§63.314. Fenceline monitoring provisions. — Inbound Citations

(j) For fenceline monitoring systems subject to § 63.314 of this subpart, each owner or operator must submit fenceline monitoring reports on a quarterly basis using the appropriate electronic template on the CEDRI website (https://www.epa.gov/electronic-reporting-air-emissions/cedri) for this subpart and following the procedure specified in § 63.9(k), except any medium submitted through mail must be sent to the attention of the Coke Ovens Sector Lead. The first quarterly report must cover the period beginning on the compliance date that is specified in § 63.314(a) of this subpart and ending on March 31, June 30, September 30 or December 31, whichever date is the first date that occurs after the owner or operator has completed at least one sampling period. Each subsequent quarterly report must cover one of the following reporting periods: Quarter 1 from January 1 through March 31; Quarter 2 from April 1 through June 30; Quarter 3 from July 1 through September 30; and Quarter 4 from October 1 through December 31. Each quarterly report must be electronically submitted no later than 45 calendar days following the end of the reporting period.

(2) Year and reporting quarter (i.e., Quarter 1, Quarter 2, Quarter 3, or Quarter 4).

(3) The latitude and longitude location coordinates; the sampler name; and identification of the type of sampler (i.e., regular monitor, extra monitor, duplicate, field blank, inactive). Coordinates must be in decimal degrees with at least five decimal places.

(5) Individual sample results for benzene reported in units of micrograms per cubic meter (mg/m 3) for each monitor for each sampling period that ends during the reporting period. Results below the method detection limit shall be flagged as below the detection limit and reported at the method detection limit. Where individual sample results are corrected according to a site specific monitoring plan according to § 63.314(f), both the original and the corrected results are reported.

(6) Data flags that indicate each monitor that was skipped for the sampling period, if the owner or operator uses an alternative sampling frequency under § 63.314(a)(2)(iii).

(7) Data flags for each outlier determined in accordance with section 9.2 of Method 325A in appendix A to this part. For each outlier, the owner or operator must submit the individual sample result of the outlier, as well as the evidence used to conclude that the result is an outlier.

(8) The biweekly concentration difference (Δc) for benzene for each sampling period and, beginning the first quarterly report with sufficient data to calculate an annual average, the annual average Δc for benzene for each sampling period.

(9) Indication of whether the owner or operator was required to develop a corrective action plan under § 63.314(e) of this subpart.

(j) For fenceline monitoring systems subject to § 63.314 of this subpart, each owner or operator must submit fenceline monitoring reports on a quarterly basis using the appropriate electronic template on the CEDRI website (https://www.epa.gov/electronic-reporting-air-emissions/cedri) for this subpart and following the procedure specified in § 63.9(k), except any medium submitted through mail must be sent to the attention of the Coke Ovens Sector Lead. The first quarterly report must cover the period beginning on the compliance date that is specified in § 63.314(a) of this subpart and ending on March 31, June 30, September 30 or December 31, whichever date is the first date that occurs after the owner or operator has completed at least one sampling period. Each subsequent quarterly report must cover one of the following reporting periods: Quarter 1 from January 1 through March 31; Quarter 2 from April 1 through June 30; Quarter 3 from July 1 through September 30; and Quarter 4 from October 1 through December 31. Each quarterly report must be electronically submitted no later than 45 calendar days following the end of the reporting period.

(2) Year and reporting quarter (i.e., Quarter 1, Quarter 2, Quarter 3, or Quarter 4).

(3) The latitude and longitude location coordinates; the sampler name; and identification of the type of sampler (i.e., regular monitor, extra monitor, duplicate, field blank, inactive). Coordinates must be in decimal degrees with at least five decimal places.

(5) Individual sample results for benzene reported in units of micrograms per cubic meter (mg/m 3) for each monitor for each sampling period that ends during the reporting period. Results below the method detection limit shall be flagged as below the detection limit and reported at the method detection limit. Where individual sample results are corrected according to a site specific monitoring plan according to § 63.314(f), both the original and the corrected results are reported.

(6) Data flags that indicate each monitor that was skipped for the sampling period, if the owner or operator uses an alternative sampling frequency under § 63.314(a)(2)(iii).

(7) Data flags for each outlier determined in accordance with section 9.2 of Method 325A in appendix A to this part. For each outlier, the owner or operator must submit the individual sample result of the outlier, as well as the evidence used to conclude that the result is an outlier.

(8) The biweekly concentration difference (Δc) for benzene for each sampling period and, beginning the first quarterly report with sufficient data to calculate an annual average, the annual average Δc for benzene for each sampling period.

(9) Indication of whether the owner or operator was required to develop a corrective action plan under § 63.314(e) of this subpart.

For each by-product coke oven battery facility as defined in § 63.301, beginning no later than July 7, 2025, the owner or operator of a coke manufacturing facility shall conduct sampling along the facility property boundary and analyze the samples in accordance with paragraphs (a) through (g) of this section.

(a) The owner or operator must conduct sampling along the facility property boundary and analyze the samples in accordance with Methods 325A and 325B in appendix A to this part and paragraphs (a)(1) through (a)(2) of this section. The monitoring perimeter may be located within the facility, inside the facility property boundary. However, the monitoring perimeter must encompass all potential sources of benzene that are located within the facility's property boundary.

(1) The owner or operator must follow the procedure in section 9.6 of Method 325B in appendix A to this part to determine the detection limit of benzene for each sampler used to collect samples and blanks.

(2) The owner or operator must use a sampling period and sampling frequency as specified in paragraphs (a)(2)(i) through (a)(2)(iii) of this section.

(i) A 14-day sampling period must be used unless a shorter sampling period is determined to be necessary under paragraph (e) or (g) of this section. A sampling period is defined as the period during which a sampling tube is deployed at a specific sampling location with the diffusive sampling end cap in-place and does not include the time required to analyze the sample. For the purpose of this subpart, a 14-day sampling period may be no shorter than 13 calendar days and no longer than 15 calendar days, but the routine sampling period must be 14 calendar days.

(ii) Except as provided in paragraph (a)(2)(iii) of this section, the frequency of sample collection must be once each contiguous 14-day sampling period, such that the beginning of the next 14-day sampling period begins immediately upon the completion of the previous 14-day sampling period.

(iii) When an individual monitor consistently achieves results for benzene at or below the level specified in paragraph (a)(3) of this section, the owner or operator may elect to use the applicable minimum sampling frequency specified in paragraphs (a)(2)(iii)(A) through (E) of this section for that monitoring site. When calculating Δc for the monitoring period when using this alternative for burden reduction, use zero for the lowest sampling result for each monitoring period where one or more samples was not taken and/or analyzed for benzene.

(A) If every sample at a monitoring site is at or below the level specified in paragraph (a)(3) of this section for 2 years (52 consecutive samples), every other sampling period can be skipped for that monitoring site, i.e., sampling will occur approximately once per month.

(B) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 26 consecutive “monthly” samples), five 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur approximately once per quarter.

(C) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(B) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 8 consecutive quarterly samples), twelve 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur twice a year.

(D) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(C) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 4 consecutive semiannual samples), only one sample per year is required for that monitoring site. For yearly sampling, samples shall occur at least 10 months but no more than 14 months apart.

(E) If at any time a sample for a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) through (D) of this section returns a result that is above the level specified in paragraph (a)(3) of this section, the sampling site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for one quarter (six 14-day sampling periods). If every sample collected during this quarter is at or below the level specified in paragraph (a)(3) of this section, the owner or operator may revert back to the reduced monitoring schedule applicable for that monitoring site prior to the sample reading exceeding the level specified in paragraph (a)(3) of this section. If any sample collected during this quarter is above the level specified in paragraph (a)(3) of this section, that monitoring site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for a minimum of two years. The burden reduction requirements can be used again for that monitoring site once the requirements of paragraph (a)(2)(iii)(A) of this section are met again, i.e., after 52 contiguous 14-day samples with no results above the level specified in paragraph (a)(3) of this section.

(3) To use the alternative sampling frequency outlined in paragraph (a)(2) of this section, an individual monitor must consistently achieve results for benzene at or below 0.7 mg/m 3.

(a) The owner or operator must conduct sampling along the facility property boundary and analyze the samples in accordance with Methods 325A and 325B in appendix A to this part and paragraphs (a)(1) through (a)(2) of this section. The monitoring perimeter may be located within the facility, inside the facility property boundary. However, the monitoring perimeter must encompass all potential sources of benzene that are located within the facility's property boundary.

(1) The owner or operator must follow the procedure in section 9.6 of Method 325B in appendix A to this part to determine the detection limit of benzene for each sampler used to collect samples and blanks.

(2) The owner or operator must use a sampling period and sampling frequency as specified in paragraphs (a)(2)(i) through (a)(2)(iii) of this section.

(i) A 14-day sampling period must be used unless a shorter sampling period is determined to be necessary under paragraph (e) or (g) of this section. A sampling period is defined as the period during which a sampling tube is deployed at a specific sampling location with the diffusive sampling end cap in-place and does not include the time required to analyze the sample. For the purpose of this subpart, a 14-day sampling period may be no shorter than 13 calendar days and no longer than 15 calendar days, but the routine sampling period must be 14 calendar days.

(ii) Except as provided in paragraph (a)(2)(iii) of this section, the frequency of sample collection must be once each contiguous 14-day sampling period, such that the beginning of the next 14-day sampling period begins immediately upon the completion of the previous 14-day sampling period.

(iii) When an individual monitor consistently achieves results for benzene at or below the level specified in paragraph (a)(3) of this section, the owner or operator may elect to use the applicable minimum sampling frequency specified in paragraphs (a)(2)(iii)(A) through (E) of this section for that monitoring site. When calculating Δc for the monitoring period when using this alternative for burden reduction, use zero for the lowest sampling result for each monitoring period where one or more samples was not taken and/or analyzed for benzene.

(A) If every sample at a monitoring site is at or below the level specified in paragraph (a)(3) of this section for 2 years (52 consecutive samples), every other sampling period can be skipped for that monitoring site, i.e., sampling will occur approximately once per month.

(B) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 26 consecutive “monthly” samples), five 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur approximately once per quarter.

(C) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(B) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 8 consecutive quarterly samples), twelve 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur twice a year.

(D) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(C) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 4 consecutive semiannual samples), only one sample per year is required for that monitoring site. For yearly sampling, samples shall occur at least 10 months but no more than 14 months apart.

(E) If at any time a sample for a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) through (D) of this section returns a result that is above the level specified in paragraph (a)(3) of this section, the sampling site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for one quarter (six 14-day sampling periods). If every sample collected during this quarter is at or below the level specified in paragraph (a)(3) of this section, the owner or operator may revert back to the reduced monitoring schedule applicable for that monitoring site prior to the sample reading exceeding the level specified in paragraph (a)(3) of this section. If any sample collected during this quarter is above the level specified in paragraph (a)(3) of this section, that monitoring site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for a minimum of two years. The burden reduction requirements can be used again for that monitoring site once the requirements of paragraph (a)(2)(iii)(A) of this section are met again, i.e., after 52 contiguous 14-day samples with no results above the level specified in paragraph (a)(3) of this section.

(3) To use the alternative sampling frequency outlined in paragraph (a)(2) of this section, an individual monitor must consistently achieve results for benzene at or below 0.7 mg/m 3.

(2) The owner or operator must use a sampling period and sampling frequency as specified in paragraphs (a)(2)(i) through (a)(2)(iii) of this section.

(i) A 14-day sampling period must be used unless a shorter sampling period is determined to be necessary under paragraph (e) or (g) of this section. A sampling period is defined as the period during which a sampling tube is deployed at a specific sampling location with the diffusive sampling end cap in-place and does not include the time required to analyze the sample. For the purpose of this subpart, a 14-day sampling period may be no shorter than 13 calendar days and no longer than 15 calendar days, but the routine sampling period must be 14 calendar days.

(ii) Except as provided in paragraph (a)(2)(iii) of this section, the frequency of sample collection must be once each contiguous 14-day sampling period, such that the beginning of the next 14-day sampling period begins immediately upon the completion of the previous 14-day sampling period.

(iii) When an individual monitor consistently achieves results for benzene at or below the level specified in paragraph (a)(3) of this section, the owner or operator may elect to use the applicable minimum sampling frequency specified in paragraphs (a)(2)(iii)(A) through (E) of this section for that monitoring site. When calculating Δc for the monitoring period when using this alternative for burden reduction, use zero for the lowest sampling result for each monitoring period where one or more samples was not taken and/or analyzed for benzene.

(A) If every sample at a monitoring site is at or below the level specified in paragraph (a)(3) of this section for 2 years (52 consecutive samples), every other sampling period can be skipped for that monitoring site, i.e., sampling will occur approximately once per month.

(B) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 26 consecutive “monthly” samples), five 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur approximately once per quarter.

(C) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(B) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 8 consecutive quarterly samples), twelve 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur twice a year.

(D) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(C) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 4 consecutive semiannual samples), only one sample per year is required for that monitoring site. For yearly sampling, samples shall occur at least 10 months but no more than 14 months apart.

(E) If at any time a sample for a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) through (D) of this section returns a result that is above the level specified in paragraph (a)(3) of this section, the sampling site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for one quarter (six 14-day sampling periods). If every sample collected during this quarter is at or below the level specified in paragraph (a)(3) of this section, the owner or operator may revert back to the reduced monitoring schedule applicable for that monitoring site prior to the sample reading exceeding the level specified in paragraph (a)(3) of this section. If any sample collected during this quarter is above the level specified in paragraph (a)(3) of this section, that monitoring site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for a minimum of two years. The burden reduction requirements can be used again for that monitoring site once the requirements of paragraph (a)(2)(iii)(A) of this section are met again, i.e., after 52 contiguous 14-day samples with no results above the level specified in paragraph (a)(3) of this section.

(2) The owner or operator must use a sampling period and sampling frequency as specified in paragraphs (a)(2)(i) through (a)(2)(iii) of this section.

(i) A 14-day sampling period must be used unless a shorter sampling period is determined to be necessary under paragraph (e) or (g) of this section. A sampling period is defined as the period during which a sampling tube is deployed at a specific sampling location with the diffusive sampling end cap in-place and does not include the time required to analyze the sample. For the purpose of this subpart, a 14-day sampling period may be no shorter than 13 calendar days and no longer than 15 calendar days, but the routine sampling period must be 14 calendar days.

(ii) Except as provided in paragraph (a)(2)(iii) of this section, the frequency of sample collection must be once each contiguous 14-day sampling period, such that the beginning of the next 14-day sampling period begins immediately upon the completion of the previous 14-day sampling period.

(iii) When an individual monitor consistently achieves results for benzene at or below the level specified in paragraph (a)(3) of this section, the owner or operator may elect to use the applicable minimum sampling frequency specified in paragraphs (a)(2)(iii)(A) through (E) of this section for that monitoring site. When calculating Δc for the monitoring period when using this alternative for burden reduction, use zero for the lowest sampling result for each monitoring period where one or more samples was not taken and/or analyzed for benzene.

(A) If every sample at a monitoring site is at or below the level specified in paragraph (a)(3) of this section for 2 years (52 consecutive samples), every other sampling period can be skipped for that monitoring site, i.e., sampling will occur approximately once per month.

(B) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 26 consecutive “monthly” samples), five 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur approximately once per quarter.

(C) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(B) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 8 consecutive quarterly samples), twelve 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur twice a year.

(D) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(C) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 4 consecutive semiannual samples), only one sample per year is required for that monitoring site. For yearly sampling, samples shall occur at least 10 months but no more than 14 months apart.

(E) If at any time a sample for a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) through (D) of this section returns a result that is above the level specified in paragraph (a)(3) of this section, the sampling site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for one quarter (six 14-day sampling periods). If every sample collected during this quarter is at or below the level specified in paragraph (a)(3) of this section, the owner or operator may revert back to the reduced monitoring schedule applicable for that monitoring site prior to the sample reading exceeding the level specified in paragraph (a)(3) of this section. If any sample collected during this quarter is above the level specified in paragraph (a)(3) of this section, that monitoring site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for a minimum of two years. The burden reduction requirements can be used again for that monitoring site once the requirements of paragraph (a)(2)(iii)(A) of this section are met again, i.e., after 52 contiguous 14-day samples with no results above the level specified in paragraph (a)(3) of this section.

(6) Data flags that indicate each monitor that was skipped for the sampling period, if the owner or operator uses an alternative sampling frequency under § 63.314(a)(2)(iii).

(2) The owner or operator must use a sampling period and sampling frequency as specified in paragraphs (a)(2)(i) through (a)(2)(iii) of this section.

(i) A 14-day sampling period must be used unless a shorter sampling period is determined to be necessary under paragraph (e) or (g) of this section. A sampling period is defined as the period during which a sampling tube is deployed at a specific sampling location with the diffusive sampling end cap in-place and does not include the time required to analyze the sample. For the purpose of this subpart, a 14-day sampling period may be no shorter than 13 calendar days and no longer than 15 calendar days, but the routine sampling period must be 14 calendar days.

(ii) Except as provided in paragraph (a)(2)(iii) of this section, the frequency of sample collection must be once each contiguous 14-day sampling period, such that the beginning of the next 14-day sampling period begins immediately upon the completion of the previous 14-day sampling period.

(iii) When an individual monitor consistently achieves results for benzene at or below the level specified in paragraph (a)(3) of this section, the owner or operator may elect to use the applicable minimum sampling frequency specified in paragraphs (a)(2)(iii)(A) through (E) of this section for that monitoring site. When calculating Δc for the monitoring period when using this alternative for burden reduction, use zero for the lowest sampling result for each monitoring period where one or more samples was not taken and/or analyzed for benzene.

(A) If every sample at a monitoring site is at or below the level specified in paragraph (a)(3) of this section for 2 years (52 consecutive samples), every other sampling period can be skipped for that monitoring site, i.e., sampling will occur approximately once per month.

(B) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 26 consecutive “monthly” samples), five 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur approximately once per quarter.

(C) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(B) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 8 consecutive quarterly samples), twelve 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur twice a year.

(D) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(C) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 4 consecutive semiannual samples), only one sample per year is required for that monitoring site. For yearly sampling, samples shall occur at least 10 months but no more than 14 months apart.

(E) If at any time a sample for a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) through (D) of this section returns a result that is above the level specified in paragraph (a)(3) of this section, the sampling site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for one quarter (six 14-day sampling periods). If every sample collected during this quarter is at or below the level specified in paragraph (a)(3) of this section, the owner or operator may revert back to the reduced monitoring schedule applicable for that monitoring site prior to the sample reading exceeding the level specified in paragraph (a)(3) of this section. If any sample collected during this quarter is above the level specified in paragraph (a)(3) of this section, that monitoring site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for a minimum of two years. The burden reduction requirements can be used again for that monitoring site once the requirements of paragraph (a)(2)(iii)(A) of this section are met again, i.e., after 52 contiguous 14-day samples with no results above the level specified in paragraph (a)(3) of this section.

(iii) When an individual monitor consistently achieves results for benzene at or below the level specified in paragraph (a)(3) of this section, the owner or operator may elect to use the applicable minimum sampling frequency specified in paragraphs (a)(2)(iii)(A) through (E) of this section for that monitoring site. When calculating Δc for the monitoring period when using this alternative for burden reduction, use zero for the lowest sampling result for each monitoring period where one or more samples was not taken and/or analyzed for benzene.

(A) If every sample at a monitoring site is at or below the level specified in paragraph (a)(3) of this section for 2 years (52 consecutive samples), every other sampling period can be skipped for that monitoring site, i.e., sampling will occur approximately once per month.

(B) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 26 consecutive “monthly” samples), five 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur approximately once per quarter.

(C) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(B) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 8 consecutive quarterly samples), twelve 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur twice a year.

(D) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(C) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 4 consecutive semiannual samples), only one sample per year is required for that monitoring site. For yearly sampling, samples shall occur at least 10 months but no more than 14 months apart.

(E) If at any time a sample for a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) through (D) of this section returns a result that is above the level specified in paragraph (a)(3) of this section, the sampling site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for one quarter (six 14-day sampling periods). If every sample collected during this quarter is at or below the level specified in paragraph (a)(3) of this section, the owner or operator may revert back to the reduced monitoring schedule applicable for that monitoring site prior to the sample reading exceeding the level specified in paragraph (a)(3) of this section. If any sample collected during this quarter is above the level specified in paragraph (a)(3) of this section, that monitoring site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for a minimum of two years. The burden reduction requirements can be used again for that monitoring site once the requirements of paragraph (a)(2)(iii)(A) of this section are met again, i.e., after 52 contiguous 14-day samples with no results above the level specified in paragraph (a)(3) of this section.

(iii) When an individual monitor consistently achieves results for benzene at or below the level specified in paragraph (a)(3) of this section, the owner or operator may elect to use the applicable minimum sampling frequency specified in paragraphs (a)(2)(iii)(A) through (E) of this section for that monitoring site. When calculating Δc for the monitoring period when using this alternative for burden reduction, use zero for the lowest sampling result for each monitoring period where one or more samples was not taken and/or analyzed for benzene.

(A) If every sample at a monitoring site is at or below the level specified in paragraph (a)(3) of this section for 2 years (52 consecutive samples), every other sampling period can be skipped for that monitoring site, i.e., sampling will occur approximately once per month.

(B) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 26 consecutive “monthly” samples), five 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur approximately once per quarter.

(C) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(B) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 8 consecutive quarterly samples), twelve 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur twice a year.

(D) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(C) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 4 consecutive semiannual samples), only one sample per year is required for that monitoring site. For yearly sampling, samples shall occur at least 10 months but no more than 14 months apart.

(E) If at any time a sample for a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) through (D) of this section returns a result that is above the level specified in paragraph (a)(3) of this section, the sampling site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for one quarter (six 14-day sampling periods). If every sample collected during this quarter is at or below the level specified in paragraph (a)(3) of this section, the owner or operator may revert back to the reduced monitoring schedule applicable for that monitoring site prior to the sample reading exceeding the level specified in paragraph (a)(3) of this section. If any sample collected during this quarter is above the level specified in paragraph (a)(3) of this section, that monitoring site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for a minimum of two years. The burden reduction requirements can be used again for that monitoring site once the requirements of paragraph (a)(2)(iii)(A) of this section are met again, i.e., after 52 contiguous 14-day samples with no results above the level specified in paragraph (a)(3) of this section.

(iii) When an individual monitor consistently achieves results for benzene at or below the level specified in paragraph (a)(3) of this section, the owner or operator may elect to use the applicable minimum sampling frequency specified in paragraphs (a)(2)(iii)(A) through (E) of this section for that monitoring site. When calculating Δc for the monitoring period when using this alternative for burden reduction, use zero for the lowest sampling result for each monitoring period where one or more samples was not taken and/or analyzed for benzene.

(A) If every sample at a monitoring site is at or below the level specified in paragraph (a)(3) of this section for 2 years (52 consecutive samples), every other sampling period can be skipped for that monitoring site, i.e., sampling will occur approximately once per month.

(B) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 26 consecutive “monthly” samples), five 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur approximately once per quarter.

(C) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(B) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 8 consecutive quarterly samples), twelve 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur twice a year.

(D) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(C) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 4 consecutive semiannual samples), only one sample per year is required for that monitoring site. For yearly sampling, samples shall occur at least 10 months but no more than 14 months apart.

(E) If at any time a sample for a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) through (D) of this section returns a result that is above the level specified in paragraph (a)(3) of this section, the sampling site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for one quarter (six 14-day sampling periods). If every sample collected during this quarter is at or below the level specified in paragraph (a)(3) of this section, the owner or operator may revert back to the reduced monitoring schedule applicable for that monitoring site prior to the sample reading exceeding the level specified in paragraph (a)(3) of this section. If any sample collected during this quarter is above the level specified in paragraph (a)(3) of this section, that monitoring site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for a minimum of two years. The burden reduction requirements can be used again for that monitoring site once the requirements of paragraph (a)(2)(iii)(A) of this section are met again, i.e., after 52 contiguous 14-day samples with no results above the level specified in paragraph (a)(3) of this section.

(iii) When an individual monitor consistently achieves results for benzene at or below the level specified in paragraph (a)(3) of this section, the owner or operator may elect to use the applicable minimum sampling frequency specified in paragraphs (a)(2)(iii)(A) through (E) of this section for that monitoring site. When calculating Δc for the monitoring period when using this alternative for burden reduction, use zero for the lowest sampling result for each monitoring period where one or more samples was not taken and/or analyzed for benzene.

(A) If every sample at a monitoring site is at or below the level specified in paragraph (a)(3) of this section for 2 years (52 consecutive samples), every other sampling period can be skipped for that monitoring site, i.e., sampling will occur approximately once per month.

(B) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 26 consecutive “monthly” samples), five 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur approximately once per quarter.

(C) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(B) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 8 consecutive quarterly samples), twelve 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur twice a year.

(D) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(C) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 4 consecutive semiannual samples), only one sample per year is required for that monitoring site. For yearly sampling, samples shall occur at least 10 months but no more than 14 months apart.

(E) If at any time a sample for a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) through (D) of this section returns a result that is above the level specified in paragraph (a)(3) of this section, the sampling site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for one quarter (six 14-day sampling periods). If every sample collected during this quarter is at or below the level specified in paragraph (a)(3) of this section, the owner or operator may revert back to the reduced monitoring schedule applicable for that monitoring site prior to the sample reading exceeding the level specified in paragraph (a)(3) of this section. If any sample collected during this quarter is above the level specified in paragraph (a)(3) of this section, that monitoring site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for a minimum of two years. The burden reduction requirements can be used again for that monitoring site once the requirements of paragraph (a)(2)(iii)(A) of this section are met again, i.e., after 52 contiguous 14-day samples with no results above the level specified in paragraph (a)(3) of this section.

(iii) When an individual monitor consistently achieves results for benzene at or below the level specified in paragraph (a)(3) of this section, the owner or operator may elect to use the applicable minimum sampling frequency specified in paragraphs (a)(2)(iii)(A) through (E) of this section for that monitoring site. When calculating Δc for the monitoring period when using this alternative for burden reduction, use zero for the lowest sampling result for each monitoring period where one or more samples was not taken and/or analyzed for benzene.

(A) If every sample at a monitoring site is at or below the level specified in paragraph (a)(3) of this section for 2 years (52 consecutive samples), every other sampling period can be skipped for that monitoring site, i.e., sampling will occur approximately once per month.

(B) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 26 consecutive “monthly” samples), five 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur approximately once per quarter.

(C) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(B) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 8 consecutive quarterly samples), twelve 14-day sampling periods can be skipped for that monitoring site following each period of sampling, i.e., sampling will occur twice a year.

(D) If every sample at a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(C) of this section is at or below the level specified in paragraph (a)(3) of this section for 2 years (i.e., 4 consecutive semiannual samples), only one sample per year is required for that monitoring site. For yearly sampling, samples shall occur at least 10 months but no more than 14 months apart.

(E) If at any time a sample for a monitoring site that is monitored at the frequency specified in paragraph (a)(2)(iii)(A) through (D) of this section returns a result that is above the level specified in paragraph (a)(3) of this section, the sampling site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for one quarter (six 14-day sampling periods). If every sample collected during this quarter is at or below the level specified in paragraph (a)(3) of this section, the owner or operator may revert back to the reduced monitoring schedule applicable for that monitoring site prior to the sample reading exceeding the level specified in paragraph (a)(3) of this section. If any sample collected during this quarter is above the level specified in paragraph (a)(3) of this section, that monitoring site must return to the original sampling requirements of contiguous 14-day sampling periods with no skip periods for a minimum of two years. The burden reduction requirements can be used again for that monitoring site once the requirements of paragraph (a)(2)(iii)(A) of this section are met again, i.e., after 52 contiguous 14-day samples with no results above the level specified in paragraph (a)(3) of this section.

For each by-product coke oven battery facility as defined in § 63.301, beginning no later than July 7, 2025, the owner or operator of a coke manufacturing facility shall conduct sampling along the facility property boundary and analyze the samples in accordance with paragraphs (a) through (g) of this section.

(b) The owner or operator shall collect and record meteorological data according to the applicable requirements in paragraphs (b)(1) through (3) of this section.

(1) If a near-field source correction is used as provided in paragraph (f)(2) of this section and/or if an alternative test method is used that provides time-resolved measurements, the owner or operator must use an on-site meteorological station in accordance with section 8.3 of Method 325A in appendix A to this part. Collect and record hourly average meteorological data, including temperature, barometric pressure, wind speed and wind direction, and calculate daily unit vector wind direction and daily sigma theta.

(2) For cases other than those specified in paragraph (b)(1) of this section, the owner or operator shall collect and record sampling period average temperature and barometric pressure using either an on-site meteorological station in accordance with section 8.3 of Method 325A in appendix A to this part or, alternatively, using data from a National Weather Service (NWS) meteorological station provided the NWS meteorological station is within 40 kilometers (25 miles) of the coke manufacturing facility.

(3) If an on-site meteorological station is used, the owner or operator shall follow the calibration and standardization procedures for meteorological measurements in EPA-454/B-08-002 (incorporated by reference, see § 63.14).

(b) The owner or operator shall collect and record meteorological data according to the applicable requirements in paragraphs (b)(1) through (3) of this section.

(1) If a near-field source correction is used as provided in paragraph (f)(2) of this section and/or if an alternative test method is used that provides time-resolved measurements, the owner or operator must use an on-site meteorological station in accordance with section 8.3 of Method 325A in appendix A to this part. Collect and record hourly average meteorological data, including temperature, barometric pressure, wind speed and wind direction, and calculate daily unit vector wind direction and daily sigma theta.

(2) For cases other than those specified in paragraph (b)(1) of this section, the owner or operator shall collect and record sampling period average temperature and barometric pressure using either an on-site meteorological station in accordance with section 8.3 of Method 325A in appendix A to this part or, alternatively, using data from a National Weather Service (NWS) meteorological station provided the NWS meteorological station is within 40 kilometers (25 miles) of the coke manufacturing facility.

(3) If an on-site meteorological station is used, the owner or operator shall follow the calibration and standardization procedures for meteorological measurements in EPA-454/B-08-002 (incorporated by reference, see § 63.14).

(b) The owner or operator shall collect and record meteorological data according to the applicable requirements in paragraphs (b)(1) through (3) of this section.

(1) If a near-field source correction is used as provided in paragraph (f)(2) of this section and/or if an alternative test method is used that provides time-resolved measurements, the owner or operator must use an on-site meteorological station in accordance with section 8.3 of Method 325A in appendix A to this part. Collect and record hourly average meteorological data, including temperature, barometric pressure, wind speed and wind direction, and calculate daily unit vector wind direction and daily sigma theta.

(2) For cases other than those specified in paragraph (b)(1) of this section, the owner or operator shall collect and record sampling period average temperature and barometric pressure using either an on-site meteorological station in accordance with section 8.3 of Method 325A in appendix A to this part or, alternatively, using data from a National Weather Service (NWS) meteorological station provided the NWS meteorological station is within 40 kilometers (25 miles) of the coke manufacturing facility.

(3) If an on-site meteorological station is used, the owner or operator shall follow the calibration and standardization procedures for meteorological measurements in EPA-454/B-08-002 (incorporated by reference, see § 63.14).

For each by-product coke oven battery facility as defined in § 63.301, beginning no later than July 7, 2025, the owner or operator of a coke manufacturing facility shall conduct sampling along the facility property boundary and analyze the samples in accordance with paragraphs (a) through (g) of this section.

For each by-product coke oven battery facility as defined in § 63.301, beginning no later than July 7, 2025, the owner or operator of a coke manufacturing facility shall conduct sampling along the facility property boundary and analyze the samples in accordance with paragraphs (a) through (g) of this section.

(9) Indication of whether the owner or operator was required to develop a corrective action plan under § 63.314(e) of this subpart.

For each by-product coke oven battery facility as defined in § 63.301, beginning no later than July 7, 2025, the owner or operator of a coke manufacturing facility shall conduct sampling along the facility property boundary and analyze the samples in accordance with paragraphs (a) through (g) of this section.

(e) An owner or operator must develop a corrective action plan if any of the conditions in paragraphs (e)(1) through (e)(3) of this section are met. The corrective action plan must describe the corrective action(s) completed to date, additional measures that the owner or operator proposes to employ to reduce annual average fenceline concentrations below the action level set forth in paragraph (c)(3) of this section, and a schedule for completion of these measures. The corrective action plan does not need to be approved by the Administrator. However, if upon review, the Administrator disagrees with the additional measures outlined in the plan, the owner or operator must revise and resubmit the plan within 7 calendar days of receiving comments from the Administrator.

(1) Except as noted in paragraph (e)(3) of this section, if upon completion of the root cause analysis and initial corrective actions required under paragraph (d) of the section, the Δc value for the next sampling period, for which the sampling start time begins after the completion of the initial corrective actions, is greater than the level specified in paragraph (c)(3) of this section. The corrective action plan must include the implementation of real-time sampling techniques to locate the primary and other contributing causes of the exceedance. The owner or operator must submit the corrective action plan to the Administrator within 60 days after receiving the analytical results indicating that the Δc value for the sampling period following the completion of the initial corrective action is greater than the level specified in paragraph (c)(3) of this section.

(2) The owner or operator must develop a corrective action plan if complete implementation of all corrective measures identified in the root cause analysis required by paragraph (e) of this section will require more than 45 days. The owner or operator must submit the corrective action plan to the Administrator no later than 60 days following the completion of the root cause analysis required in paragraph (d) of this section.

(3) The owner or operator must develop a corrective action plan if upon completion of the root cause analysis and following implementation of the approved revision to the site-specific monitoring plan required under paragraph (d)(3) of this section, the Δc value for the next sampling period, for which the sampling start time begins after implementation of the approved revision to the site-specific monitoring plan, is greater than the level specified in paragraph (c)(3) of this section. The corrective action plan must include the implementation of real-time sampling techniques to locate the primary and other contributing causes of the exceedance. The owner or operator must submit the corrective action plan to the Administrator within 60 days after receiving the analytical results indicating that the Δc value for the sampling period following the implementation of the approved revision to the site-specific monitoring plan is greater than the level specified in paragraph (c)(3) of this section.

(e) An owner or operator must develop a corrective action plan if any of the conditions in paragraphs (e)(1) through (e)(3) of this section are met. The corrective action plan must describe the corrective action(s) completed to date, additional measures that the owner or operator proposes to employ to reduce annual average fenceline concentrations below the action level set forth in paragraph (c)(3) of this section, and a schedule for completion of these measures. The corrective action plan does not need to be approved by the Administrator. However, if upon review, the Administrator disagrees with the additional measures outlined in the plan, the owner or operator must revise and resubmit the plan within 7 calendar days of receiving comments from the Administrator.

(1) Except as noted in paragraph (e)(3) of this section, if upon completion of the root cause analysis and initial corrective actions required under paragraph (d) of the section, the Δc value for the next sampling period, for which the sampling start time begins after the completion of the initial corrective actions, is greater than the level specified in paragraph (c)(3) of this section. The corrective action plan must include the implementation of real-time sampling techniques to locate the primary and other contributing causes of the exceedance. The owner or operator must submit the corrective action plan to the Administrator within 60 days after receiving the analytical results indicating that the Δc value for the sampling period following the completion of the initial corrective action is greater than the level specified in paragraph (c)(3) of this section.

(2) The owner or operator must develop a corrective action plan if complete implementation of all corrective measures identified in the root cause analysis required by paragraph (e) of this section will require more than 45 days. The owner or operator must submit the corrective action plan to the Administrator no later than 60 days following the completion of the root cause analysis required in paragraph (d) of this section.

(3) The owner or operator must develop a corrective action plan if upon completion of the root cause analysis and following implementation of the approved revision to the site-specific monitoring plan required under paragraph (d)(3) of this section, the Δc value for the next sampling period, for which the sampling start time begins after implementation of the approved revision to the site-specific monitoring plan, is greater than the level specified in paragraph (c)(3) of this section. The corrective action plan must include the implementation of real-time sampling techniques to locate the primary and other contributing causes of the exceedance. The owner or operator must submit the corrective action plan to the Administrator within 60 days after receiving the analytical results indicating that the Δc value for the sampling period following the implementation of the approved revision to the site-specific monitoring plan is greater than the level specified in paragraph (c)(3) of this section.

(e) An owner or operator must develop a corrective action plan if any of the conditions in paragraphs (e)(1) through (e)(3) of this section are met. The corrective action plan must describe the corrective action(s) completed to date, additional measures that the owner or operator proposes to employ to reduce annual average fenceline concentrations below the action level set forth in paragraph (c)(3) of this section, and a schedule for completion of these measures. The corrective action plan does not need to be approved by the Administrator. However, if upon review, the Administrator disagrees with the additional measures outlined in the plan, the owner or operator must revise and resubmit the plan within 7 calendar days of receiving comments from the Administrator.

(1) Except as noted in paragraph (e)(3) of this section, if upon completion of the root cause analysis and initial corrective actions required under paragraph (d) of the section, the Δc value for the next sampling period, for which the sampling start time begins after the completion of the initial corrective actions, is greater than the level specified in paragraph (c)(3) of this section. The corrective action plan must include the implementation of real-time sampling techniques to locate the primary and other contributing causes of the exceedance. The owner or operator must submit the corrective action plan to the Administrator within 60 days after receiving the analytical results indicating that the Δc value for the sampling period following the completion of the initial corrective action is greater than the level specified in paragraph (c)(3) of this section.

(2) The owner or operator must develop a corrective action plan if complete implementation of all corrective measures identified in the root cause analysis required by paragraph (e) of this section will require more than 45 days. The owner or operator must submit the corrective action plan to the Administrator no later than 60 days following the completion of the root cause analysis required in paragraph (d) of this section.

(3) The owner or operator must develop a corrective action plan if upon completion of the root cause analysis and following implementation of the approved revision to the site-specific monitoring plan required under paragraph (d)(3) of this section, the Δc value for the next sampling period, for which the sampling start time begins after implementation of the approved revision to the site-specific monitoring plan, is greater than the level specified in paragraph (c)(3) of this section. The corrective action plan must include the implementation of real-time sampling techniques to locate the primary and other contributing causes of the exceedance. The owner or operator must submit the corrective action plan to the Administrator within 60 days after receiving the analytical results indicating that the Δc value for the sampling period following the implementation of the approved revision to the site-specific monitoring plan is greater than the level specified in paragraph (c)(3) of this section.

(5) Individual sample results for benzene reported in units of micrograms per cubic meter (mg/m 3) for each monitor for each sampling period that ends during the reporting period. Results below the method detection limit shall be flagged as below the detection limit and reported at the method detection limit. Where individual sample results are corrected according to a site specific monitoring plan according to § 63.314(f), both the original and the corrected results are reported.

For each by-product coke oven battery facility as defined in § 63.301, beginning no later than July 7, 2025, the owner or operator of a coke manufacturing facility shall conduct sampling along the facility property boundary and analyze the samples in accordance with paragraphs (a) through (g) of this section.

(f) An owner or operator may request approval from the Administrator for a site-specific monitoring plan to account for offsite upwind sources or onsite sources not subject to a regulation codified in 40 CFR part 63 according to the requirements in paragraphs (f)(1) through (4) of this section.

(1) The owner or operator must prepare and submit a site-specific monitoring plan and receive approval of the site-specific monitoring plan prior to using the near-field source alternative calculation for determining Δc provided in paragraph (f)(2) of this section. The site-specific monitoring plan shall include, at a minimum, the elements specified in paragraphs (f)(1)(i) through (v) of this section. The procedures in section 12 of Method 325A in appendix A to this part are not required, but may be used, if applicable, when determining near-field source contributions.

(i) For onsite sources, specify that the onsite source is not subject to a regulation codified in 40 CFR part 63 and identify any federal regulation or federally enforceable permit condition the source is subject to.

(ii) If more than one near-field source is present, identify the near-field source or sources that are expected to contribute to the concentration at each monitoring location.

(iii) A description of (including sample calculations illustrating) the planned data reduction; treatment of invalid data and data below detection limits; and calculations to determine the near-field source concentration contribution for each monitoring location.

(iv) A detailed description of the measurement technique, measurement location(s), the standard operating procedures, measurement frequency, recording frequency, measurement detection limit, and data quality indicators to ensure accuracy, precision, and validity of the data. If you are accounting for on-site sources, you must use a real-time sampling technique (e.g., mobile gas chromatographs, optical spectroscopy instruments, sensors).

(v) A detailed description of how data will be handled during periods of calm wind conditions (i.e., less than 2 miles per hour).

(2) When an approved site-specific monitoring plan is used, the owner or operator shall determine Δc for comparison with action level according to paragraph (c) of this section. When determining the sample results for use in the Δc calculation, the concentration for any monitor that has been corrected using an approved site-specific monitoring plan will be corrected according to the procedures specified in paragraphs (f)(2)(i) and (ii) of this section.

(i) For each monitoring location corrected using the site-specific monitoring plan, the corrected fenceline concentration at that monitoring station will be equal to the fenceline concentration measured with Methods 325A and 325B in appendix A to this part minus the near-field source contributing concentration at the measurement location determined using the additional measurements and calculation procedures included in the approved site-specific monitoring plan.

(ii) If the fenceline concentration at the monitoring station is below the method detection limit for Methods 325A and 325B in appendix A to this part, no near-field source contribution can be subtracted from that monitoring station for that sampling period.

(3) The site-specific monitoring plan shall be submitted and approved as described in paragraphs (f)(3)(i) through (iv) of this section.

(i) The site-specific monitoring plan must be submitted to the Administrator for approval.

(ii) The site-specific monitoring plan shall also be submitted to the following address: U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Sector Policies and Programs Division, U.S. EPA Mailroom (D243-02), Attention: Metals and Inorganic Chemicals Group, 109 T.W. Alexander Drive, Research Triangle Park, NC 27711. Electronic copies in lieu of hard copies also may be submitted to [email protected].

(iii) The Administrator shall approve or disapprove the plan in 120 days. The plan shall be considered approved if the Administrator either approves the plan in writing or fails to disapprove the plan in writing. The 120-day period shall begin when the Administrator confirms receipt of a complete site-specific monitoring plan.

(iv) If the Administrator finds any deficiencies in the site-specific monitoring plan and disapproves the plan in writing, the owner or operator may revise and resubmit the site-specific monitoring plan following the requirements in paragraphs (f)(3)(i) and (ii) of this section. The 120-day period starts over with the resubmission of the revised monitoring plan. The Administrator may indicate in writing that a submitted plan is incomplete and specify the information necessary for completeness.

(4) The approval by the Administrator of a site-specific monitoring plan will be based on the completeness, accuracy and reasonableness of the request for a site-specific monitoring plan. Factors that the Administrator will consider in reviewing the request for a site-specific monitoring plan include, but are not limited to, those described in paragraphs (f)(4)(i) through (v) of this section.

(i) The identification of the near-field source or sources and evidence of how the sources impact the fenceline concentration.

(ii) The location(s) selected for additional monitoring to determine the near-field source concentration contribution.

(iv) The appropriateness of the planned data reduction and calculations to determine the near-field source concentration contribution for each monitoring location, including the handling of invalid data, data below the detection limit, and data during calm periods.

(v) The adequacy of the description of and the rationale for the measurement technique, measurement location(s), the standard operating procedure, the measurement and recording frequency, measurement detection limit, and data quality indicators proposed to ensure accuracy, precision, and validity of the data.

(1) The owner or operator must prepare and submit a site-specific monitoring plan and receive approval of the site-specific monitoring plan prior to using the near-field source alternative calculation for determining Δc provided in paragraph (f)(2) of this section. The site-specific monitoring plan shall include, at a minimum, the elements specified in paragraphs (f)(1)(i) through (v) of this section. The procedures in section 12 of Method 325A in appendix A to this part are not required, but may be used, if applicable, when determining near-field source contributions.

(i) For onsite sources, specify that the onsite source is not subject to a regulation codified in 40 CFR part 63 and identify any federal regulation or federally enforceable permit condition the source is subject to.

(ii) If more than one near-field source is present, identify the near-field source or sources that are expected to contribute to the concentration at each monitoring location.

(iii) A description of (including sample calculations illustrating) the planned data reduction; treatment of invalid data and data below detection limits; and calculations to determine the near-field source concentration contribution for each monitoring location.

(iv) A detailed description of the measurement technique, measurement location(s), the standard operating procedures, measurement frequency, recording frequency, measurement detection limit, and data quality indicators to ensure accuracy, precision, and validity of the data. If you are accounting for on-site sources, you must use a real-time sampling technique (e.g., mobile gas chromatographs, optical spectroscopy instruments, sensors).

(v) A detailed description of how data will be handled during periods of calm wind conditions (i.e., less than 2 miles per hour).

(1) The owner or operator must prepare and submit a site-specific monitoring plan and receive approval of the site-specific monitoring plan prior to using the near-field source alternative calculation for determining Δc provided in paragraph (f)(2) of this section. The site-specific monitoring plan shall include, at a minimum, the elements specified in paragraphs (f)(1)(i) through (v) of this section. The procedures in section 12 of Method 325A in appendix A to this part are not required, but may be used, if applicable, when determining near-field source contributions.

(i) For onsite sources, specify that the onsite source is not subject to a regulation codified in 40 CFR part 63 and identify any federal regulation or federally enforceable permit condition the source is subject to.

(ii) If more than one near-field source is present, identify the near-field source or sources that are expected to contribute to the concentration at each monitoring location.

(iii) A description of (including sample calculations illustrating) the planned data reduction; treatment of invalid data and data below detection limits; and calculations to determine the near-field source concentration contribution for each monitoring location.

(iv) A detailed description of the measurement technique, measurement location(s), the standard operating procedures, measurement frequency, recording frequency, measurement detection limit, and data quality indicators to ensure accuracy, precision, and validity of the data. If you are accounting for on-site sources, you must use a real-time sampling technique (e.g., mobile gas chromatographs, optical spectroscopy instruments, sensors).

(v) A detailed description of how data will be handled during periods of calm wind conditions (i.e., less than 2 miles per hour).

(1) The owner or operator must prepare and submit a site-specific monitoring plan and receive approval of the site-specific monitoring plan prior to using the near-field source alternative calculation for determining Δc provided in paragraph (f)(2) of this section. The site-specific monitoring plan shall include, at a minimum, the elements specified in paragraphs (f)(1)(i) through (v) of this section. The procedures in section 12 of Method 325A in appendix A to this part are not required, but may be used, if applicable, when determining near-field source contributions.

(i) For onsite sources, specify that the onsite source is not subject to a regulation codified in 40 CFR part 63 and identify any federal regulation or federally enforceable permit condition the source is subject to.

(ii) If more than one near-field source is present, identify the near-field source or sources that are expected to contribute to the concentration at each monitoring location.

(iii) A description of (including sample calculations illustrating) the planned data reduction; treatment of invalid data and data below detection limits; and calculations to determine the near-field source concentration contribution for each monitoring location.

(iv) A detailed description of the measurement technique, measurement location(s), the standard operating procedures, measurement frequency, recording frequency, measurement detection limit, and data quality indicators to ensure accuracy, precision, and validity of the data. If you are accounting for on-site sources, you must use a real-time sampling technique (e.g., mobile gas chromatographs, optical spectroscopy instruments, sensors).

(v) A detailed description of how data will be handled during periods of calm wind conditions (i.e., less than 2 miles per hour).

(1) The owner or operator must prepare and submit a site-specific monitoring plan and receive approval of the site-specific monitoring plan prior to using the near-field source alternative calculation for determining Δc provided in paragraph (f)(2) of this section. The site-specific monitoring plan shall include, at a minimum, the elements specified in paragraphs (f)(1)(i) through (v) of this section. The procedures in section 12 of Method 325A in appendix A to this part are not required, but may be used, if applicable, when determining near-field source contributions.

(i) For onsite sources, specify that the onsite source is not subject to a regulation codified in 40 CFR part 63 and identify any federal regulation or federally enforceable permit condition the source is subject to.

(ii) If more than one near-field source is present, identify the near-field source or sources that are expected to contribute to the concentration at each monitoring location.

(iii) A description of (including sample calculations illustrating) the planned data reduction; treatment of invalid data and data below detection limits; and calculations to determine the near-field source concentration contribution for each monitoring location.

(iv) A detailed description of the measurement technique, measurement location(s), the standard operating procedures, measurement frequency, recording frequency, measurement detection limit, and data quality indicators to ensure accuracy, precision, and validity of the data. If you are accounting for on-site sources, you must use a real-time sampling technique (e.g., mobile gas chromatographs, optical spectroscopy instruments, sensors).

(v) A detailed description of how data will be handled during periods of calm wind conditions (i.e., less than 2 miles per hour).

(1) The owner or operator must prepare and submit a site-specific monitoring plan and receive approval of the site-specific monitoring plan prior to using the near-field source alternative calculation for determining Δc provided in paragraph (f)(2) of this section. The site-specific monitoring plan shall include, at a minimum, the elements specified in paragraphs (f)(1)(i) through (v) of this section. The procedures in section 12 of Method 325A in appendix A to this part are not required, but may be used, if applicable, when determining near-field source contributions.

(i) For onsite sources, specify that the onsite source is not subject to a regulation codified in 40 CFR part 63 and identify any federal regulation or federally enforceable permit condition the source is subject to.

(ii) If more than one near-field source is present, identify the near-field source or sources that are expected to contribute to the concentration at each monitoring location.

(iii) A description of (including sample calculations illustrating) the planned data reduction; treatment of invalid data and data below detection limits; and calculations to determine the near-field source concentration contribution for each monitoring location.

(iv) A detailed description of the measurement technique, measurement location(s), the standard operating procedures, measurement frequency, recording frequency, measurement detection limit, and data quality indicators to ensure accuracy, precision, and validity of the data. If you are accounting for on-site sources, you must use a real-time sampling technique (e.g., mobile gas chromatographs, optical spectroscopy instruments, sensors).

(v) A detailed description of how data will be handled during periods of calm wind conditions (i.e., less than 2 miles per hour).

(f) An owner or operator may request approval from the Administrator for a site-specific monitoring plan to account for offsite upwind sources or onsite sources not subject to a regulation codified in 40 CFR part 63 according to the requirements in paragraphs (f)(1) through (4) of this section.

(1) The owner or operator must prepare and submit a site-specific monitoring plan and receive approval of the site-specific monitoring plan prior to using the near-field source alternative calculation for determining Δc provided in paragraph (f)(2) of this section. The site-specific monitoring plan shall include, at a minimum, the elements specified in paragraphs (f)(1)(i) through (v) of this section. The procedures in section 12 of Method 325A in appendix A to this part are not required, but may be used, if applicable, when determining near-field source contributions.

(i) For onsite sources, specify that the onsite source is not subject to a regulation codified in 40 CFR part 63 and identify any federal regulation or federally enforceable permit condition the source is subject to.

(ii) If more than one near-field source is present, identify the near-field source or sources that are expected to contribute to the concentration at each monitoring location.

(iii) A description of (including sample calculations illustrating) the planned data reduction; treatment of invalid data and data below detection limits; and calculations to determine the near-field source concentration contribution for each monitoring location.

(iv) A detailed description of the measurement technique, measurement location(s), the standard operating procedures, measurement frequency, recording frequency, measurement detection limit, and data quality indicators to ensure accuracy, precision, and validity of the data. If you are accounting for on-site sources, you must use a real-time sampling technique (e.g., mobile gas chromatographs, optical spectroscopy instruments, sensors).

(v) A detailed description of how data will be handled during periods of calm wind conditions (i.e., less than 2 miles per hour).

(2) When an approved site-specific monitoring plan is used, the owner or operator shall determine Δc for comparison with action level according to paragraph (c) of this section. When determining the sample results for use in the Δc calculation, the concentration for any monitor that has been corrected using an approved site-specific monitoring plan will be corrected according to the procedures specified in paragraphs (f)(2)(i) and (ii) of this section.

(i) For each monitoring location corrected using the site-specific monitoring plan, the corrected fenceline concentration at that monitoring station will be equal to the fenceline concentration measured with Methods 325A and 325B in appendix A to this part minus the near-field source contributing concentration at the measurement location determined using the additional measurements and calculation procedures included in the approved site-specific monitoring plan.

(ii) If the fenceline concentration at the monitoring station is below the method detection limit for Methods 325A and 325B in appendix A to this part, no near-field source contribution can be subtracted from that monitoring station for that sampling period.

(3) The site-specific monitoring plan shall be submitted and approved as described in paragraphs (f)(3)(i) through (iv) of this section.

(i) The site-specific monitoring plan must be submitted to the Administrator for approval.

(ii) The site-specific monitoring plan shall also be submitted to the following address: U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Sector Policies and Programs Division, U.S. EPA Mailroom (D243-02), Attention: Metals and Inorganic Chemicals Group, 109 T.W. Alexander Drive, Research Triangle Park, NC 27711. Electronic copies in lieu of hard copies also may be submitted to [email protected].

(iii) The Administrator shall approve or disapprove the plan in 120 days. The plan shall be considered approved if the Administrator either approves the plan in writing or fails to disapprove the plan in writing. The 120-day period shall begin when the Administrator confirms receipt of a complete site-specific monitoring plan.

(iv) If the Administrator finds any deficiencies in the site-specific monitoring plan and disapproves the plan in writing, the owner or operator may revise and resubmit the site-specific monitoring plan following the requirements in paragraphs (f)(3)(i) and (ii) of this section. The 120-day period starts over with the resubmission of the revised monitoring plan. The Administrator may indicate in writing that a submitted plan is incomplete and specify the information necessary for completeness.

(4) The approval by the Administrator of a site-specific monitoring plan will be based on the completeness, accuracy and reasonableness of the request for a site-specific monitoring plan. Factors that the Administrator will consider in reviewing the request for a site-specific monitoring plan include, but are not limited to, those described in paragraphs (f)(4)(i) through (v) of this section.

(i) The identification of the near-field source or sources and evidence of how the sources impact the fenceline concentration.

(ii) The location(s) selected for additional monitoring to determine the near-field source concentration contribution.

(iv) The appropriateness of the planned data reduction and calculations to determine the near-field source concentration contribution for each monitoring location, including the handling of invalid data, data below the detection limit, and data during calm periods.

(v) The adequacy of the description of and the rationale for the measurement technique, measurement location(s), the standard operating procedure, the measurement and recording frequency, measurement detection limit, and data quality indicators proposed to ensure accuracy, precision, and validity of the data.

(f) An owner or operator may request approval from the Administrator for a site-specific monitoring plan to account for offsite upwind sources or onsite sources not subject to a regulation codified in 40 CFR part 63 according to the requirements in paragraphs (f)(1) through (4) of this section.

(1) The owner or operator must prepare and submit a site-specific monitoring plan and receive approval of the site-specific monitoring plan prior to using the near-field source alternative calculation for determining Δc provided in paragraph (f)(2) of this section. The site-specific monitoring plan shall include, at a minimum, the elements specified in paragraphs (f)(1)(i) through (v) of this section. The procedures in section 12 of Method 325A in appendix A to this part are not required, but may be used, if applicable, when determining near-field source contributions.

(i) For onsite sources, specify that the onsite source is not subject to a regulation codified in 40 CFR part 63 and identify any federal regulation or federally enforceable permit condition the source is subject to.

(ii) If more than one near-field source is present, identify the near-field source or sources that are expected to contribute to the concentration at each monitoring location.

(iii) A description of (including sample calculations illustrating) the planned data reduction; treatment of invalid data and data below detection limits; and calculations to determine the near-field source concentration contribution for each monitoring location.

(iv) A detailed description of the measurement technique, measurement location(s), the standard operating procedures, measurement frequency, recording frequency, measurement detection limit, and data quality indicators to ensure accuracy, precision, and validity of the data. If you are accounting for on-site sources, you must use a real-time sampling technique (e.g., mobile gas chromatographs, optical spectroscopy instruments, sensors).

(v) A detailed description of how data will be handled during periods of calm wind conditions (i.e., less than 2 miles per hour).

(2) When an approved site-specific monitoring plan is used, the owner or operator shall determine Δc for comparison with action level according to paragraph (c) of this section. When determining the sample results for use in the Δc calculation, the concentration for any monitor that has been corrected using an approved site-specific monitoring plan will be corrected according to the procedures specified in paragraphs (f)(2)(i) and (ii) of this section.

(i) For each monitoring location corrected using the site-specific monitoring plan, the corrected fenceline concentration at that monitoring station will be equal to the fenceline concentration measured with Methods 325A and 325B in appendix A to this part minus the near-field source contributing concentration at the measurement location determined using the additional measurements and calculation procedures included in the approved site-specific monitoring plan.

(ii) If the fenceline concentration at the monitoring station is below the method detection limit for Methods 325A and 325B in appendix A to this part, no near-field source contribution can be subtracted from that monitoring station for that sampling period.

(3) The site-specific monitoring plan shall be submitted and approved as described in paragraphs (f)(3)(i) through (iv) of this section.

(i) The site-specific monitoring plan must be submitted to the Administrator for approval.

(ii) The site-specific monitoring plan shall also be submitted to the following address: U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Sector Policies and Programs Division, U.S. EPA Mailroom (D243-02), Attention: Metals and Inorganic Chemicals Group, 109 T.W. Alexander Drive, Research Triangle Park, NC 27711. Electronic copies in lieu of hard copies also may be submitted to [email protected].

(iii) The Administrator shall approve or disapprove the plan in 120 days. The plan shall be considered approved if the Administrator either approves the plan in writing or fails to disapprove the plan in writing. The 120-day period shall begin when the Administrator confirms receipt of a complete site-specific monitoring plan.

(iv) If the Administrator finds any deficiencies in the site-specific monitoring plan and disapproves the plan in writing, the owner or operator may revise and resubmit the site-specific monitoring plan following the requirements in paragraphs (f)(3)(i) and (ii) of this section. The 120-day period starts over with the resubmission of the revised monitoring plan. The Administrator may indicate in writing that a submitted plan is incomplete and specify the information necessary for completeness.

(4) The approval by the Administrator of a site-specific monitoring plan will be based on the completeness, accuracy and reasonableness of the request for a site-specific monitoring plan. Factors that the Administrator will consider in reviewing the request for a site-specific monitoring plan include, but are not limited to, those described in paragraphs (f)(4)(i) through (v) of this section.

(i) The identification of the near-field source or sources and evidence of how the sources impact the fenceline concentration.

(ii) The location(s) selected for additional monitoring to determine the near-field source concentration contribution.

(iv) The appropriateness of the planned data reduction and calculations to determine the near-field source concentration contribution for each monitoring location, including the handling of invalid data, data below the detection limit, and data during calm periods.

(v) The adequacy of the description of and the rationale for the measurement technique, measurement location(s), the standard operating procedure, the measurement and recording frequency, measurement detection limit, and data quality indicators proposed to ensure accuracy, precision, and validity of the data.

(3) The site-specific monitoring plan shall be submitted and approved as described in paragraphs (f)(3)(i) through (iv) of this section.

(i) The site-specific monitoring plan must be submitted to the Administrator for approval.

(ii) The site-specific monitoring plan shall also be submitted to the following address: U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Sector Policies and Programs Division, U.S. EPA Mailroom (D243-02), Attention: Metals and Inorganic Chemicals Group, 109 T.W. Alexander Drive, Research Triangle Park, NC 27711. Electronic copies in lieu of hard copies also may be submitted to [email protected].

(iii) The Administrator shall approve or disapprove the plan in 120 days. The plan shall be considered approved if the Administrator either approves the plan in writing or fails to disapprove the plan in writing. The 120-day period shall begin when the Administrator confirms receipt of a complete site-specific monitoring plan.

(iv) If the Administrator finds any deficiencies in the site-specific monitoring plan and disapproves the plan in writing, the owner or operator may revise and resubmit the site-specific monitoring plan following the requirements in paragraphs (f)(3)(i) and (ii) of this section. The 120-day period starts over with the resubmission of the revised monitoring plan. The Administrator may indicate in writing that a submitted plan is incomplete and specify the information necessary for completeness.

(3) The site-specific monitoring plan shall be submitted and approved as described in paragraphs (f)(3)(i) through (iv) of this section.

(i) The site-specific monitoring plan must be submitted to the Administrator for approval.

(ii) The site-specific monitoring plan shall also be submitted to the following address: U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Sector Policies and Programs Division, U.S. EPA Mailroom (D243-02), Attention: Metals and Inorganic Chemicals Group, 109 T.W. Alexander Drive, Research Triangle Park, NC 27711. Electronic copies in lieu of hard copies also may be submitted to [email protected].

(iii) The Administrator shall approve or disapprove the plan in 120 days. The plan shall be considered approved if the Administrator either approves the plan in writing or fails to disapprove the plan in writing. The 120-day period shall begin when the Administrator confirms receipt of a complete site-specific monitoring plan.

(iv) If the Administrator finds any deficiencies in the site-specific monitoring plan and disapproves the plan in writing, the owner or operator may revise and resubmit the site-specific monitoring plan following the requirements in paragraphs (f)(3)(i) and (ii) of this section. The 120-day period starts over with the resubmission of the revised monitoring plan. The Administrator may indicate in writing that a submitted plan is incomplete and specify the information necessary for completeness.

(3) The site-specific monitoring plan shall be submitted and approved as described in paragraphs (f)(3)(i) through (iv) of this section.

(i) The site-specific monitoring plan must be submitted to the Administrator for approval.

(ii) The site-specific monitoring plan shall also be submitted to the following address: U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Sector Policies and Programs Division, U.S. EPA Mailroom (D243-02), Attention: Metals and Inorganic Chemicals Group, 109 T.W. Alexander Drive, Research Triangle Park, NC 27711. Electronic copies in lieu of hard copies also may be submitted to [email protected].

(iii) The Administrator shall approve or disapprove the plan in 120 days. The plan shall be considered approved if the Administrator either approves the plan in writing or fails to disapprove the plan in writing. The 120-day period shall begin when the Administrator confirms receipt of a complete site-specific monitoring plan.

(iv) If the Administrator finds any deficiencies in the site-specific monitoring plan and disapproves the plan in writing, the owner or operator may revise and resubmit the site-specific monitoring plan following the requirements in paragraphs (f)(3)(i) and (ii) of this section. The 120-day period starts over with the resubmission of the revised monitoring plan. The Administrator may indicate in writing that a submitted plan is incomplete and specify the information necessary for completeness.

(3) The site-specific monitoring plan shall be submitted and approved as described in paragraphs (f)(3)(i) through (iv) of this section.

(i) The site-specific monitoring plan must be submitted to the Administrator for approval.

(ii) The site-specific monitoring plan shall also be submitted to the following address: U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Sector Policies and Programs Division, U.S. EPA Mailroom (D243-02), Attention: Metals and Inorganic Chemicals Group, 109 T.W. Alexander Drive, Research Triangle Park, NC 27711. Electronic copies in lieu of hard copies also may be submitted to [email protected].

(iii) The Administrator shall approve or disapprove the plan in 120 days. The plan shall be considered approved if the Administrator either approves the plan in writing or fails to disapprove the plan in writing. The 120-day period shall begin when the Administrator confirms receipt of a complete site-specific monitoring plan.

(iv) If the Administrator finds any deficiencies in the site-specific monitoring plan and disapproves the plan in writing, the owner or operator may revise and resubmit the site-specific monitoring plan following the requirements in paragraphs (f)(3)(i) and (ii) of this section. The 120-day period starts over with the resubmission of the revised monitoring plan. The Administrator may indicate in writing that a submitted plan is incomplete and specify the information necessary for completeness.

(f) An owner or operator may request approval from the Administrator for a site-specific monitoring plan to account for offsite upwind sources or onsite sources not subject to a regulation codified in 40 CFR part 63 according to the requirements in paragraphs (f)(1) through (4) of this section.

(1) The owner or operator must prepare and submit a site-specific monitoring plan and receive approval of the site-specific monitoring plan prior to using the near-field source alternative calculation for determining Δc provided in paragraph (f)(2) of this section. The site-specific monitoring plan shall include, at a minimum, the elements specified in paragraphs (f)(1)(i) through (v) of this section. The procedures in section 12 of Method 325A in appendix A to this part are not required, but may be used, if applicable, when determining near-field source contributions.

(i) For onsite sources, specify that the onsite source is not subject to a regulation codified in 40 CFR part 63 and identify any federal regulation or federally enforceable permit condition the source is subject to.

(ii) If more than one near-field source is present, identify the near-field source or sources that are expected to contribute to the concentration at each monitoring location.

(iii) A description of (including sample calculations illustrating) the planned data reduction; treatment of invalid data and data below detection limits; and calculations to determine the near-field source concentration contribution for each monitoring location.

(iv) A detailed description of the measurement technique, measurement location(s), the standard operating procedures, measurement frequency, recording frequency, measurement detection limit, and data quality indicators to ensure accuracy, precision, and validity of the data. If you are accounting for on-site sources, you must use a real-time sampling technique (e.g., mobile gas chromatographs, optical spectroscopy instruments, sensors).

(v) A detailed description of how data will be handled during periods of calm wind conditions (i.e., less than 2 miles per hour).

(2) When an approved site-specific monitoring plan is used, the owner or operator shall determine Δc for comparison with action level according to paragraph (c) of this section. When determining the sample results for use in the Δc calculation, the concentration for any monitor that has been corrected using an approved site-specific monitoring plan will be corrected according to the procedures specified in paragraphs (f)(2)(i) and (ii) of this section.

(i) For each monitoring location corrected using the site-specific monitoring plan, the corrected fenceline concentration at that monitoring station will be equal to the fenceline concentration measured with Methods 325A and 325B in appendix A to this part minus the near-field source contributing concentration at the measurement location determined using the additional measurements and calculation procedures included in the approved site-specific monitoring plan.

(ii) If the fenceline concentration at the monitoring station is below the method detection limit for Methods 325A and 325B in appendix A to this part, no near-field source contribution can be subtracted from that monitoring station for that sampling period.

(3) The site-specific monitoring plan shall be submitted and approved as described in paragraphs (f)(3)(i) through (iv) of this section.

(i) The site-specific monitoring plan must be submitted to the Administrator for approval.

(ii) The site-specific monitoring plan shall also be submitted to the following address: U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Sector Policies and Programs Division, U.S. EPA Mailroom (D243-02), Attention: Metals and Inorganic Chemicals Group, 109 T.W. Alexander Drive, Research Triangle Park, NC 27711. Electronic copies in lieu of hard copies also may be submitted to [email protected].

(iii) The Administrator shall approve or disapprove the plan in 120 days. The plan shall be considered approved if the Administrator either approves the plan in writing or fails to disapprove the plan in writing. The 120-day period shall begin when the Administrator confirms receipt of a complete site-specific monitoring plan.

(iv) If the Administrator finds any deficiencies in the site-specific monitoring plan and disapproves the plan in writing, the owner or operator may revise and resubmit the site-specific monitoring plan following the requirements in paragraphs (f)(3)(i) and (ii) of this section. The 120-day period starts over with the resubmission of the revised monitoring plan. The Administrator may indicate in writing that a submitted plan is incomplete and specify the information necessary for completeness.

(4) The approval by the Administrator of a site-specific monitoring plan will be based on the completeness, accuracy and reasonableness of the request for a site-specific monitoring plan. Factors that the Administrator will consider in reviewing the request for a site-specific monitoring plan include, but are not limited to, those described in paragraphs (f)(4)(i) through (v) of this section.

(i) The identification of the near-field source or sources and evidence of how the sources impact the fenceline concentration.

(ii) The location(s) selected for additional monitoring to determine the near-field source concentration contribution.

(iv) The appropriateness of the planned data reduction and calculations to determine the near-field source concentration contribution for each monitoring location, including the handling of invalid data, data below the detection limit, and data during calm periods.

(v) The adequacy of the description of and the rationale for the measurement technique, measurement location(s), the standard operating procedure, the measurement and recording frequency, measurement detection limit, and data quality indicators proposed to ensure accuracy, precision, and validity of the data.

(4) The approval by the Administrator of a site-specific monitoring plan will be based on the completeness, accuracy and reasonableness of the request for a site-specific monitoring plan. Factors that the Administrator will consider in reviewing the request for a site-specific monitoring plan include, but are not limited to, those described in paragraphs (f)(4)(i) through (v) of this section.

(i) The identification of the near-field source or sources and evidence of how the sources impact the fenceline concentration.

(ii) The location(s) selected for additional monitoring to determine the near-field source concentration contribution.

(iv) The appropriateness of the planned data reduction and calculations to determine the near-field source concentration contribution for each monitoring location, including the handling of invalid data, data below the detection limit, and data during calm periods.

(v) The adequacy of the description of and the rationale for the measurement technique, measurement location(s), the standard operating procedure, the measurement and recording frequency, measurement detection limit, and data quality indicators proposed to ensure accuracy, precision, and validity of the data.

(4) The approval by the Administrator of a site-specific monitoring plan will be based on the completeness, accuracy and reasonableness of the request for a site-specific monitoring plan. Factors that the Administrator will consider in reviewing the request for a site-specific monitoring plan include, but are not limited to, those described in paragraphs (f)(4)(i) through (v) of this section.

(i) The identification of the near-field source or sources and evidence of how the sources impact the fenceline concentration.

(ii) The location(s) selected for additional monitoring to determine the near-field source concentration contribution.

(iv) The appropriateness of the planned data reduction and calculations to determine the near-field source concentration contribution for each monitoring location, including the handling of invalid data, data below the detection limit, and data during calm periods.

(v) The adequacy of the description of and the rationale for the measurement technique, measurement location(s), the standard operating procedure, the measurement and recording frequency, measurement detection limit, and data quality indicators proposed to ensure accuracy, precision, and validity of the data.

(4) The approval by the Administrator of a site-specific monitoring plan will be based on the completeness, accuracy and reasonableness of the request for a site-specific monitoring plan. Factors that the Administrator will consider in reviewing the request for a site-specific monitoring plan include, but are not limited to, those described in paragraphs (f)(4)(i) through (v) of this section.

(i) The identification of the near-field source or sources and evidence of how the sources impact the fenceline concentration.

(ii) The location(s) selected for additional monitoring to determine the near-field source concentration contribution.

(iv) The appropriateness of the planned data reduction and calculations to determine the near-field source concentration contribution for each monitoring location, including the handling of invalid data, data below the detection limit, and data during calm periods.

(v) The adequacy of the description of and the rationale for the measurement technique, measurement location(s), the standard operating procedure, the measurement and recording frequency, measurement detection limit, and data quality indicators proposed to ensure accuracy, precision, and validity of the data.

(4) The approval by the Administrator of a site-specific monitoring plan will be based on the completeness, accuracy and reasonableness of the request for a site-specific monitoring plan. Factors that the Administrator will consider in reviewing the request for a site-specific monitoring plan include, but are not limited to, those described in paragraphs (f)(4)(i) through (v) of this section.

(i) The identification of the near-field source or sources and evidence of how the sources impact the fenceline concentration.

(ii) The location(s) selected for additional monitoring to determine the near-field source concentration contribution.

(iv) The appropriateness of the planned data reduction and calculations to determine the near-field source concentration contribution for each monitoring location, including the handling of invalid data, data below the detection limit, and data during calm periods.

(v) The adequacy of the description of and the rationale for the measurement technique, measurement location(s), the standard operating procedure, the measurement and recording frequency, measurement detection limit, and data quality indicators proposed to ensure accuracy, precision, and validity of the data.

(4) The approval by the Administrator of a site-specific monitoring plan will be based on the completeness, accuracy and reasonableness of the request for a site-specific monitoring plan. Factors that the Administrator will consider in reviewing the request for a site-specific monitoring plan include, but are not limited to, those described in paragraphs (f)(4)(i) through (v) of this section.

(i) The identification of the near-field source or sources and evidence of how the sources impact the fenceline concentration.

(ii) The location(s) selected for additional monitoring to determine the near-field source concentration contribution.

(iv) The appropriateness of the planned data reduction and calculations to determine the near-field source concentration contribution for each monitoring location, including the handling of invalid data, data below the detection limit, and data during calm periods.

(v) The adequacy of the description of and the rationale for the measurement technique, measurement location(s), the standard operating procedure, the measurement and recording frequency, measurement detection limit, and data quality indicators proposed to ensure accuracy, precision, and validity of the data.

For each by-product coke oven battery facility as defined in § 63.301, beginning no later than July 7, 2025, the owner or operator of a coke manufacturing facility shall conduct sampling along the facility property boundary and analyze the samples in accordance with paragraphs (a) through (g) of this section.

(h) As outlined in § 63.7(f), the owner or operator may submit a request for an alternative test method. At a minimum, the request must follow the requirements outlined in paragraphs (h)(1) through (7) of this section.

(1) The alternative method may be used in lieu of all samplers or a partial number of the passive samplers required in Method 325A in appendix A to this part.

(2) The alternative method must be validated according to Method 301 in appendix A of this part or contain performance-based procedures and indicators to ensure self-validation.

(3) The method detection limit must nominally be at least one-third of the action level. The alternate test method must describe the procedures used to provide field verification of the detection limit in the sample matrix being measured.

(4) If the alternative test method will be used to replace some or all passive samplers required under paragraph (a) of this section, the spatial coverage must be equal to or better than the spatial coverage provided in Method 325A in appendix A to this part.

(i) For path average concentration open-path instruments, the physical path length of the measurement shall be no more than a passive sample footprint (the spacing that would be provided by the sorbent traps when following Method 325A). For example, if Method 325A requires spacing monitors A and B 610 meters (2000 feet) apart, then the physical path length limit for the measurement at that portion of the fenceline shall be no more than 610 meters (2000 feet).

(ii) For range resolved open-path instrument or approach, the instrument or approach must be able to resolve an average concentration over each passive sampler footprint within the path length of the instrument.

(iii) The extra samplers required in sections 8.2.1.3 of Method 325A may be omitted when they fall within the path length of an open-path instrument.

(5) At a minimum, non-integrating alternative test methods must provide a minimum of one cycle of operation (sampling, analyzing, and data recording) for each successive 15-minute period.

(6) For alternative test methods capable of real time measurements (less than a 5-minute sampling and analysis cycle), the alternative test method may allow for elimination of data points corresponding to outside emission sources for purpose of calculation of the high point for the two-week average. The alternative test method approach must have wind speed, direction and stability class of the same time resolution and within the footprint of the instrument.

(7) For purposes of averaging data points to determine the Δc for the 14-day average high sample result, all results measured under the method detection limit must use the method detection limit. For purposes of averaging data points for the 14-day average low sample result, all results measured under the method detection limit must use zero.

(h) As outlined in § 63.7(f), the owner or operator may submit a request for an alternative test method. At a minimum, the request must follow the requirements outlined in paragraphs (h)(1) through (7) of this section.

(1) The alternative method may be used in lieu of all samplers or a partial number of the passive samplers required in Method 325A in appendix A to this part.

(2) The alternative method must be validated according to Method 301 in appendix A of this part or contain performance-based procedures and indicators to ensure self-validation.

(3) The method detection limit must nominally be at least one-third of the action level. The alternate test method must describe the procedures used to provide field verification of the detection limit in the sample matrix being measured.

(4) If the alternative test method will be used to replace some or all passive samplers required under paragraph (a) of this section, the spatial coverage must be equal to or better than the spatial coverage provided in Method 325A in appendix A to this part.

(i) For path average concentration open-path instruments, the physical path length of the measurement shall be no more than a passive sample footprint (the spacing that would be provided by the sorbent traps when following Method 325A). For example, if Method 325A requires spacing monitors A and B 610 meters (2000 feet) apart, then the physical path length limit for the measurement at that portion of the fenceline shall be no more than 610 meters (2000 feet).

(ii) For range resolved open-path instrument or approach, the instrument or approach must be able to resolve an average concentration over each passive sampler footprint within the path length of the instrument.

(iii) The extra samplers required in sections 8.2.1.3 of Method 325A may be omitted when they fall within the path length of an open-path instrument.

(5) At a minimum, non-integrating alternative test methods must provide a minimum of one cycle of operation (sampling, analyzing, and data recording) for each successive 15-minute period.

(6) For alternative test methods capable of real time measurements (less than a 5-minute sampling and analysis cycle), the alternative test method may allow for elimination of data points corresponding to outside emission sources for purpose of calculation of the high point for the two-week average. The alternative test method approach must have wind speed, direction and stability class of the same time resolution and within the footprint of the instrument.

(7) For purposes of averaging data points to determine the Δc for the 14-day average high sample result, all results measured under the method detection limit must use the method detection limit. For purposes of averaging data points for the 14-day average low sample result, all results measured under the method detection limit must use zero.

(h) As outlined in § 63.7(f), the owner or operator may submit a request for an alternative test method. At a minimum, the request must follow the requirements outlined in paragraphs (h)(1) through (7) of this section.

(1) The alternative method may be used in lieu of all samplers or a partial number of the passive samplers required in Method 325A in appendix A to this part.

(2) The alternative method must be validated according to Method 301 in appendix A of this part or contain performance-based procedures and indicators to ensure self-validation.

(3) The method detection limit must nominally be at least one-third of the action level. The alternate test method must describe the procedures used to provide field verification of the detection limit in the sample matrix being measured.

(4) If the alternative test method will be used to replace some or all passive samplers required under paragraph (a) of this section, the spatial coverage must be equal to or better than the spatial coverage provided in Method 325A in appendix A to this part.

(i) For path average concentration open-path instruments, the physical path length of the measurement shall be no more than a passive sample footprint (the spacing that would be provided by the sorbent traps when following Method 325A). For example, if Method 325A requires spacing monitors A and B 610 meters (2000 feet) apart, then the physical path length limit for the measurement at that portion of the fenceline shall be no more than 610 meters (2000 feet).

(ii) For range resolved open-path instrument or approach, the instrument or approach must be able to resolve an average concentration over each passive sampler footprint within the path length of the instrument.

(iii) The extra samplers required in sections 8.2.1.3 of Method 325A may be omitted when they fall within the path length of an open-path instrument.

(5) At a minimum, non-integrating alternative test methods must provide a minimum of one cycle of operation (sampling, analyzing, and data recording) for each successive 15-minute period.

(6) For alternative test methods capable of real time measurements (less than a 5-minute sampling and analysis cycle), the alternative test method may allow for elimination of data points corresponding to outside emission sources for purpose of calculation of the high point for the two-week average. The alternative test method approach must have wind speed, direction and stability class of the same time resolution and within the footprint of the instrument.

(7) For purposes of averaging data points to determine the Δc for the 14-day average high sample result, all results measured under the method detection limit must use the method detection limit. For purposes of averaging data points for the 14-day average low sample result, all results measured under the method detection limit must use zero.

(h) As outlined in § 63.7(f), the owner or operator may submit a request for an alternative test method. At a minimum, the request must follow the requirements outlined in paragraphs (h)(1) through (7) of this section.

(1) The alternative method may be used in lieu of all samplers or a partial number of the passive samplers required in Method 325A in appendix A to this part.

(2) The alternative method must be validated according to Method 301 in appendix A of this part or contain performance-based procedures and indicators to ensure self-validation.

(3) The method detection limit must nominally be at least one-third of the action level. The alternate test method must describe the procedures used to provide field verification of the detection limit in the sample matrix being measured.

(4) If the alternative test method will be used to replace some or all passive samplers required under paragraph (a) of this section, the spatial coverage must be equal to or better than the spatial coverage provided in Method 325A in appendix A to this part.

(i) For path average concentration open-path instruments, the physical path length of the measurement shall be no more than a passive sample footprint (the spacing that would be provided by the sorbent traps when following Method 325A). For example, if Method 325A requires spacing monitors A and B 610 meters (2000 feet) apart, then the physical path length limit for the measurement at that portion of the fenceline shall be no more than 610 meters (2000 feet).

(ii) For range resolved open-path instrument or approach, the instrument or approach must be able to resolve an average concentration over each passive sampler footprint within the path length of the instrument.

(iii) The extra samplers required in sections 8.2.1.3 of Method 325A may be omitted when they fall within the path length of an open-path instrument.

(5) At a minimum, non-integrating alternative test methods must provide a minimum of one cycle of operation (sampling, analyzing, and data recording) for each successive 15-minute period.

(6) For alternative test methods capable of real time measurements (less than a 5-minute sampling and analysis cycle), the alternative test method may allow for elimination of data points corresponding to outside emission sources for purpose of calculation of the high point for the two-week average. The alternative test method approach must have wind speed, direction and stability class of the same time resolution and within the footprint of the instrument.

(7) For purposes of averaging data points to determine the Δc for the 14-day average high sample result, all results measured under the method detection limit must use the method detection limit. For purposes of averaging data points for the 14-day average low sample result, all results measured under the method detection limit must use zero.

(h) As outlined in § 63.7(f), the owner or operator may submit a request for an alternative test method. At a minimum, the request must follow the requirements outlined in paragraphs (h)(1) through (7) of this section.

(1) The alternative method may be used in lieu of all samplers or a partial number of the passive samplers required in Method 325A in appendix A to this part.

(2) The alternative method must be validated according to Method 301 in appendix A of this part or contain performance-based procedures and indicators to ensure self-validation.

(3) The method detection limit must nominally be at least one-third of the action level. The alternate test method must describe the procedures used to provide field verification of the detection limit in the sample matrix being measured.

(4) If the alternative test method will be used to replace some or all passive samplers required under paragraph (a) of this section, the spatial coverage must be equal to or better than the spatial coverage provided in Method 325A in appendix A to this part.

(i) For path average concentration open-path instruments, the physical path length of the measurement shall be no more than a passive sample footprint (the spacing that would be provided by the sorbent traps when following Method 325A). For example, if Method 325A requires spacing monitors A and B 610 meters (2000 feet) apart, then the physical path length limit for the measurement at that portion of the fenceline shall be no more than 610 meters (2000 feet).

(ii) For range resolved open-path instrument or approach, the instrument or approach must be able to resolve an average concentration over each passive sampler footprint within the path length of the instrument.

(iii) The extra samplers required in sections 8.2.1.3 of Method 325A may be omitted when they fall within the path length of an open-path instrument.

(5) At a minimum, non-integrating alternative test methods must provide a minimum of one cycle of operation (sampling, analyzing, and data recording) for each successive 15-minute period.

(6) For alternative test methods capable of real time measurements (less than a 5-minute sampling and analysis cycle), the alternative test method may allow for elimination of data points corresponding to outside emission sources for purpose of calculation of the high point for the two-week average. The alternative test method approach must have wind speed, direction and stability class of the same time resolution and within the footprint of the instrument.

(7) For purposes of averaging data points to determine the Δc for the 14-day average high sample result, all results measured under the method detection limit must use the method detection limit. For purposes of averaging data points for the 14-day average low sample result, all results measured under the method detection limit must use zero.

(h) As outlined in § 63.7(f), the owner or operator may submit a request for an alternative test method. At a minimum, the request must follow the requirements outlined in paragraphs (h)(1) through (7) of this section.

(1) The alternative method may be used in lieu of all samplers or a partial number of the passive samplers required in Method 325A in appendix A to this part.

(2) The alternative method must be validated according to Method 301 in appendix A of this part or contain performance-based procedures and indicators to ensure self-validation.

(3) The method detection limit must nominally be at least one-third of the action level. The alternate test method must describe the procedures used to provide field verification of the detection limit in the sample matrix being measured.

(4) If the alternative test method will be used to replace some or all passive samplers required under paragraph (a) of this section, the spatial coverage must be equal to or better than the spatial coverage provided in Method 325A in appendix A to this part.

(i) For path average concentration open-path instruments, the physical path length of the measurement shall be no more than a passive sample footprint (the spacing that would be provided by the sorbent traps when following Method 325A). For example, if Method 325A requires spacing monitors A and B 610 meters (2000 feet) apart, then the physical path length limit for the measurement at that portion of the fenceline shall be no more than 610 meters (2000 feet).

(ii) For range resolved open-path instrument or approach, the instrument or approach must be able to resolve an average concentration over each passive sampler footprint within the path length of the instrument.

(iii) The extra samplers required in sections 8.2.1.3 of Method 325A may be omitted when they fall within the path length of an open-path instrument.

(5) At a minimum, non-integrating alternative test methods must provide a minimum of one cycle of operation (sampling, analyzing, and data recording) for each successive 15-minute period.

(6) For alternative test methods capable of real time measurements (less than a 5-minute sampling and analysis cycle), the alternative test method may allow for elimination of data points corresponding to outside emission sources for purpose of calculation of the high point for the two-week average. The alternative test method approach must have wind speed, direction and stability class of the same time resolution and within the footprint of the instrument.

(7) For purposes of averaging data points to determine the Δc for the 14-day average high sample result, all results measured under the method detection limit must use the method detection limit. For purposes of averaging data points for the 14-day average low sample result, all results measured under the method detection limit must use zero.

(h) As outlined in § 63.7(f), the owner or operator may submit a request for an alternative test method. At a minimum, the request must follow the requirements outlined in paragraphs (h)(1) through (7) of this section.

(1) The alternative method may be used in lieu of all samplers or a partial number of the passive samplers required in Method 325A in appendix A to this part.

(2) The alternative method must be validated according to Method 301 in appendix A of this part or contain performance-based procedures and indicators to ensure self-validation.

(3) The method detection limit must nominally be at least one-third of the action level. The alternate test method must describe the procedures used to provide field verification of the detection limit in the sample matrix being measured.

(4) If the alternative test method will be used to replace some or all passive samplers required under paragraph (a) of this section, the spatial coverage must be equal to or better than the spatial coverage provided in Method 325A in appendix A to this part.

(i) For path average concentration open-path instruments, the physical path length of the measurement shall be no more than a passive sample footprint (the spacing that would be provided by the sorbent traps when following Method 325A). For example, if Method 325A requires spacing monitors A and B 610 meters (2000 feet) apart, then the physical path length limit for the measurement at that portion of the fenceline shall be no more than 610 meters (2000 feet).

(ii) For range resolved open-path instrument or approach, the instrument or approach must be able to resolve an average concentration over each passive sampler footprint within the path length of the instrument.

(iii) The extra samplers required in sections 8.2.1.3 of Method 325A may be omitted when they fall within the path length of an open-path instrument.

(5) At a minimum, non-integrating alternative test methods must provide a minimum of one cycle of operation (sampling, analyzing, and data recording) for each successive 15-minute period.

(6) For alternative test methods capable of real time measurements (less than a 5-minute sampling and analysis cycle), the alternative test method may allow for elimination of data points corresponding to outside emission sources for purpose of calculation of the high point for the two-week average. The alternative test method approach must have wind speed, direction and stability class of the same time resolution and within the footprint of the instrument.

(7) For purposes of averaging data points to determine the Δc for the 14-day average high sample result, all results measured under the method detection limit must use the method detection limit. For purposes of averaging data points for the 14-day average low sample result, all results measured under the method detection limit must use zero.