Powder Mill State Fish Hatchery, New Durham, NH Draft
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NPDES Permit No. NH0000710 2019 Draft Permit Page 1 of 22 AUTHORIZATION TO DISCHARGE UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM In compliance with the provisions of the Federal Clean Water Act as amended, (33 U.S.C. §§1251 et seq.; the “CWA”, New Hampshire Fish and Game Department is authorized to discharge from a facility located at Powder Mill State Fish Hatchery 288 Merrymeeting Road New Durham, NH 03855 to receiving water named Merrymeeting River Hydrologic Basin Code 01070002 in accordance with effluent limitations, monitoring requirements and other conditions set forth herein. This permit shall become effective on [DATE].1 This permit expires at midnight, on [DATE]. This permit supersedes the permit issued on December 22, 2011. This permit consists of this cover page, Part I and Part II (NPDES Part II Standard Conditions, April 2018). Signed this day of _________________________ Ken Moraff, Director Water Division Environmental Protection Agency Region 1 Boston, MA 1 Pursuant to 40 Code of Federal Regulations (C.F.R.) § 124.15(b)(3), if no comments requesting a change to the Draft Permit are received, the permit will become effective upon the date of signature. Procedures for appealing EPA’s Final Permit decision may be found at 40 C.F.R. § 124.19. NPDES Permit No. NH0000710 2019 Draft Permit Page 2 of 22 PART I A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS 1. During the period beginning on the effective date and lasting through the expiration date, the Permittee is authorized to discharge culture water and treated hatchery effluent through Outfall Serial Number 001 to Merrymeeting River. The discharge shall be limited and monitored as specified below. Effluent Limitation Monitoring Requirements1,2,3 Effluent Characteristic Average Measurement Maximum Daily Sample Type5 Monthly Frequency4 Effluent Flow6 2.0 MGD Report 1/day Meter or Estimate Report lbs/d Report lbs/d Total Suspended Solids (TSS) 1/week Composite Report mg/L Report mg/L7 Report lbs/d Report lbs/d Biochemical Oxygen Demand (BOD5) 1/week Composite Report mg/L Report mg/L pH8 6.5 - 8.0 S.U. 1/week Grab Ambient pH8 Report S.U. Report lbs/d Report lbs/d Total Ammonia as N 1/month Composite Report mg/L Report mg/L Report lbs/d Report lbs/d Total Nitrogen 1/week Composite Report mg/L Report mg/L Report lbs/d Report lbs/d Effluent Total Phosphorus (October – May)9 1/week Composite 25 µg/L Report µg/L Effluent Total Phosphorus (June – Report lbs/d Report lbs/d 1/week Composite September)9 14 µg/L Report µg/L NPDES Permit No. NH0000710 2019 Draft Permit Page 3 of 22 Effluent Limitation Monitoring Requirements1,2,3 Effluent Characteristic Average Measurement Maximum Daily Sample Type5 Monthly Frequency4 Interim Total Phosphorus Requirement (first Report lbs/d Report lbs/d 60 months from the effective date of the 1/week Composite Report µg/L Report µg/L permit) Dissolved Oxygen13 Report Minimum mg/L 1/week Grab Dissolved Oxygen Saturation13 Report Minimum % 1/week Grab Effluent Temperature13 Report °F 1/week Grab Fish Biomass on Hand Report lbs/d --- 1/month Calculation Fish Feed Used Report lbs/d Report lbs/d 1/month Calculation Feed Conversion Ratio Report --- 1/month Calculation Total Residual Chlorine (when in use)14 11 µg/L 19 µg/L 1/day Grab Hydrogen Peroxide (when in use) --- 0.7 mg/L 1/day Grab Formaldehyde (Formalin in use)15, 16 1.6 mg/L 4.6 mg/L 1/day Grab Dissolved Oxygen (Formalin in use)15 Report Minimum mg/L 1/day Grab NPDES Permit No. NH0000710 2019 Draft Permit Page 4 of 22 2. During the period beginning on the effective date and lasting through the expiration date, the Permittee is authorized to discharge culture water and treated hatchery effluent through Outfall Serial Number 002 to Merrymeeting River. The discharge shall be limited and monitored as specified below. Effluent Limitation Monitoring Requirements1,2,3 Effluent Characteristic Average Measurement Maximum Daily Sample Type5 Monthly Frequency4 Effluent Flow6 4.2 MGD Report 1/day Meter or Estimate Report lbs/d Report lbs/d Total Suspended Solids (TSS) 1/week Composite Report mg/L Report mg/L7 Report lbs/d Report lbs/d Biochemical Oxygen Demand (BOD5) 1/week Composite Report mg/L Report mg/L pH8 6.5 - 8.0 S.U. 1/week Grab Report lbs/d Report lbs/d Total Ammonia as N 1/month Composite Report mg/L Report mg/L Report lbs/d Report lbs/d Total Nitrogen 1/week Composite Report mg/L Report mg/L Report lbs/d Report lbs/d Effluent Total Phosphorus9 1/week Composite 25 µg/L Report µg/L Effluent Total Phosphorus (June – Report lbs/d Report lbs/d 1/week Composite September)9 14 µg/L Report µg/L Interim Total Phosphorus Requirement (first Report lbs/d Report lbs/d 60 months from the effective date of the 1/week Composite Report µg/L Report µg/L permit) Dissolved Oxygen13 Report Minimum mg/L 1/week Grab Dissolved Oxygen Saturation13 Report % 1/week Grab NPDES Permit No. NH0000710 2019 Draft Permit Page 5 of 22 Effluent Limitation Monitoring Requirements1,2,3 Effluent Characteristic Average Measurement Maximum Daily Sample Type5 Monthly Frequency4 Effluent Temperature13 Report °F 1/week Grab Fish Biomass on Hand Report lbs/d --- 1/month Calculation Fish Feed Used Report lbs/d Report lbs/d 1/month Calculation Feed Conversion Ratio Report --- 1/month Calculation Total Residual Chlorine (when in use)14 11 µg/L 19 µg/L 1/day Grab Hydrogen Peroxide (when in use) --- 0.7 mg/L 1/day Grab Formaldehyde (Formalin in use) 15,16 1.6 mg/L 4.6 mg/L 1/day Grab Dissolved Oxygen (Formalin in use)15 Report Minimum mg/L 1/day Grab NPDES Permit No. NH0000710 2019 Draft Permit Page 6 of 22 3. During the period beginning on the effective date and lasting through the expiration date, the Permittee is authorized to discharge culture water and treated hatchery effluent through Outfall Serial Number SUM, which is the calculated cumulative load from Outfall Serial Numbers 001 and 002 to Merrymeeting River. The cumulative discharge from both outfalls combined shall be limited and monitored as specified below; Marsh Pond shall be monitored as specified below. Effluent Limitation Monitoring Requirements1,2,3 Effluent Characteristic Average Measurement Annual Total Sample Type5 Monthly Frequency4 Report Annual Total Phosphorus Load10 395 lbs/year 1/month Calculation lbs/month Seasonal Total Phosphorus Load (June – Report 87 lbs/season 1/month Calculation September)11 lbs/month Interim Total Phosphorus Requirement (first Report 60 months from the effective date of the Report lbs/year 1/week Composite lbs/month permit) Ambient Total Phosphorus12 --- Report µg/L 2/month Grab Ambient Chlorophyll-a12 --- Report µg/L 2/month Grab Ambient Secchi Disc Transparency12 --- Report m 2/month Grab NPDES Permit No. NH0000710 2019 Draft Permit Page 7 of 22 Footnotes for Parts I.A.1, I.A.2, and I.A.3: 1. Effluent samples shall yield data representative of the discharge. A routine sampling program shall be developed in which samples are taken at the discharge point to the receiving water after treatment, prior to co-mingling with any other wastestream. Changes in sampling location must be approved in writing by the Environmental Protection Agency Region 1 (EPA) and the State. The Permittee shall report the results to EPA and the State of any additional testing above that required herein, if testing is done in accordance with 40 C.F.R. § 136. 2. In accordance with 40 C.F.R. § 122.44(i)(1)(iv), the Permittee shall monitor according to sufficiently sensitive test procedures (i.e., methods) approved under 40 C.F.R. Part 136 or required under 40 C.F.R. chapter I, subchapter N or O, for the analysis of pollutants or pollutant parameters (except WET). A method is “sufficiently sensitive” when: 1) The method minimum level (ML) is at or below the level of the effluent limitation established in the permit for the measured pollutant or pollutant parameter; or 2) The method has the lowest ML of the analytical methods approved under 40 C.F.R. Part 136 or required under 40 C.F.R. chapter I, subchapter N or O for the measured pollutant or pollutant parameter. The term “minimum level” refers to either the sample concentration equivalent to the lowest calibration point in a method or a multiple of the method detection limit (MDL), whichever is higher. Minimum levels may be obtained in several ways: They may be published in a method; they may be based on the lowest acceptable calibration point used by a laboratory; or they may be calculated by multiplying the MDL in a method, or the MDL determined by a laboratory, by a factor. 3. When a parameter is not detected above the ML, the Permittee must report the data qualifier signifying less than the ML for that parameter (e.g., < 50 μg/L, if the ML for a parameter is 50 μg/L). When calculating and reporting the average monthly concentration when one or more values are not detected, assign a value of zero to all non-detects and report the average of all the results. The number of exceedances shall be enumerated for each parameter in the field provided on every Discharge Monitoring Report (DMR). 4. Measurement frequency of 1/day is defined as the recording of one measurement for each 24-hour period. Measurement frequency of 1/week is defined as the sampling of one discharge event in each seven-day calendar week.