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Home My WebLink AboutNC0023736_Permit (Modification)_19950626NPDES DOCUMENT :SCANNING COVER SHEET NC0023736 Gunpowder Creek WWTP NPDES Permit: Document Type: Permit Issuance Wasteload Allocation Authorization to Construct (AtC) Permit Modification Complete File - Historical Engineering Alternatives (EAA) Correspondence Instream Assessment (67b) Speculative Limits Environmental Assessment (EA) Document Date: June 26, 1995 This document is printed on reuse paper - ignore any Content on the reYerse side State of North Carolina Department of Environment, Health and Natural Resources Division of Environmental Management James B. Hunt, Jr., Governor Jonathan B. Howes, Secretary A. Preston Howard, Jr., P.E., Director Mr. Jim Hipp City of Lenoir P.O. Box 958 Lenoir, North Carolina 28645 AVA �EEHN1l IL Me June 26, 1995 Subject: Stream Flow Monitoring Permit No. NC0023736 Lenoir - Gunpowder Creek WWTP Caldwell County Dear Mr. Hipp: On May 26, 1995, the Division of Environmental Management issued a modification to Part III, Condition G of the subject permit, extending the deadline to begin monitoring stream flow to July 1, 1995. Based on the City's latest request the deadline is now January 1, 1996. This should allow sufficient time to complete any preliminary studies of stream flow. Please insert the enclosed pages and discard the old pages. This permit modification becomes effective immediately. All other terms and conditions in the original permit remain unchanged and in full effect. These modifications are issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between North Carolina and the U.S. Environmental Protection Agency dated December 6, 1983. If this modification is unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt of this letter. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, Post Office Drawer 11666, Raleigh, North Carolina 27604. Unless such demand is made, this decision shall be final and binding. If you have any questions concerning this permit, please contact Mr. Greg Nizich at telephone number 919/733-5083, extension 541. Sincerely, enclosure cc: Central Files Asheville Regional Office, Water Quality Section Permit File Instream Assessment Unit McGill and Associates it6ZA. Preston Howard, Jr., P.E. P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone 919-733-5083 FAX 919-733-9919 An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper G. INSTREAM MONITORING REQUIREMENTS parameter Frequency Sample Type Location Dissolved Oxygen Weekly* Grab U, Di, D2, D3 Temperature Weekly* Grab U, D 1, D2, D3 Conductivity Weekly* Grab U, Di, D2, D3 Fecal Coliform Weekly* Grab U, D 1, D2, D3 pH** Weekly Grab U, D1, D2, D3 Total Phosphorus** Weekly Grab U, Di, D2, D3 Total Nitrogen** Weekly Grab U, Di, D2, D3 Chlorophyll a** Weekly Grab U, D 1, D2, D3 Pheophytin a** Weekly Grab D2 U - At least 100 feet upstream Di - approximately 2,000 ft below outfall + D2 - Gunpowder Creek before start of Old Millpond or at SR 1002 D3 - at SR 1107 in the pooled area of Old Millpond Note: Samples at D2 should be taken between 11:30 am and 1:30 pm. + Monitoring at this location will be dropped if the facility chooses to monitor stream flow either above or below the Old Millpond Dam by January 1, 1996. * Sampling frequency increases to 3/week at all sites during June, July, August and September. ** Monitoring required only during May, June, July, August and September. H. CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY) The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in: 1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic Bioassay Procedure - Revised *September 1989) or subsequent versions. The effluent concentration at which there may be no observable inhibition of reproduction or significant mortality is 38% (defined as treatment two in the North Carolina procedure document). The permit holder shall perform quarterly monitoring using this procedure to establish compliance with the permit condition. The first test will be performed after thirty days from the effective date of this permit during the months of March, June, September, and December. Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes. All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR-1) for the month in which it was performed, using the parameter code TGP3B. Additionally, DEM Form AT-1 (original) is to be sent to the following address: Attention: Environmental Sciences Branch North Carolina Division of Environmental Management 4401 Reedy Creek Road Raleigh, N.C. 27607 Test data shall be complete and accurate and include all supporting chemical/physical measurements performed in association with the toxicity tests, as well as all dose/response data. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring will begin immediately until such time that a single test is passed. Upon passing, this monthly test requirement will revert to quarterly in the months specified above. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Environmental Management indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include alternate monitoring requirements or limits. NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival and appropriate environmental controls, shall constitute an invalid test and will require immediate retesting(within 30 days of initial monitoring event). Failure to submit suitable test results will constitute noncompliance with monitoring requirements. I. AMMONIA LIMIT An ammonia limit will be phased in to allow the City of Lenoir to do additional studies and modify the plant to meet the ammonia limits. As of July 1, 1995, an ammonia limit at the flow limit of 1.2 MGD is specified to protect Gunpowder Creek. The summer ammonia limit will be 2.3 mg/1 and the winter limit will be 5.5 mg/l. State of North Carolina Department of Environment, Health and Natural Resources Division of Environmental Management James B. Hunt, Jr., Governor Jonathan B. Howes, Secretary A. Preston Howard, Jr., P.E., Director Mr. Jim Hipp City of Lenoir P.O. Box 958 Lenoir, North Carolina 28645 May 26, 1995 Subject: Stream Flow Monitoring Permit No. NC0023736 Lenoir - Gunpowder Creek WWTP Caldwell County Dear Mr. Hipp: On March 31, 1995, the Division of Environmental Management issued NPDES Permit No. NC0023736 to the City of Lenoir . Based on the City's request, Part III, Condition G now specifies the deadline of July 1, 1995 to begin monitoring stream flow. Please insert the enclosed pages and discard the old pages. This permit modification becomes effective immediately. All other terms and conditions in the original permit remain unchanged and in full effect. These modifications are issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between North Carolina and the U.S. Environmental Protection Agency dated December 6, 1983. If this modification is unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt of this letter. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, Post Office Drawer 11666, Raleigh, North Carolina 27604. Unless such demand is made, this decision shall be final and binding. If you have any questions concerning this permit, please contact Mr. Greg Nizich at telephone number 919/733-5083, extension 541. Sincerely, enclosure cc: Central Files Asheville Regional Office, Water Quality Section Permit File Instream Assessment Unit McGill and Associates Vl . Preston Howard, Jr., P.E. rA P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone 919-733-5083 FAX 919-733-9919 An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper G. INSTREAM MONITORING REQUIREMENTS Parameter Frequency Sample Type Location Dissolved Oxygen Weekly* Grab U, Di, D2, D3 Temperature Weekly* Grab U, D1, D2, D3 Conductivity Weekly* Grab U, Di, D2, D3 Fecal Coliform Weekly* Grab U, Di, D2, D3 pH** Weekly Grab U, Di, D2, D3 Total Phosphorus** Weekly Grab U, Di, D2, D3 Total Nitrogen** Weekly Grab U, Di, D2, D3 Chlorophyll a** Weekly Grab U, Di, D2, D3 Pheophytin a** Weekly Grab D2 U - At least 100 feet upstream Di - approximately 2,000 ft below outfall + D2 - Gunpowder Creek before start of Old Millpond or at SR 1002 D3 - at SR 1107 in the pooled area of Old Millpond Note: Samples at D2 should be taken between 11:30 am and 1:30 pm. + Monitoring at this location will be dropped if the facility chooses to monitor stream flow either above or below the Old Millpond Dam by July 1, 1995. * Sampling frequency increases to 3/week at all sites during June, July, August and September. ** Monitoring required only during May, June, July, August and September. H. CHRONIC TOXICITY PAS S/FAIL PERMIT LIMIT (QRTRLY) The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in: 1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic Bioassay Procedure - Revised *September 1989) or subsequent versions. The effluent concentration at which there may be no observable inhibition of reproduction or significant mortality is 38% (defined as treatment two in the North Carolina procedure document). The permit holder shall perform quarterly monitoring using this procedure to establish compliance with the permit condition. The first test will be performed after thirty days from the effective date of this permit during the months of March, June, September, and December. Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes. All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR-1) for the month in which it was performed, using the parameter code TGP3B. Additionally, DEM Form AT-1 (original) is to be sent to the following address: Attention: Environmental Sciences Branch North Carolina Division of Environmental Management 4401 Reedy Creek Road Raleigh, N.C. 27607 Test data shall be complete and accurate and include all supporting chemical/physical measurements performed in association with the toxicity tests, as well as all dose/response data. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. • Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring will begin immediately until such time that a single test is passed. Upon passing, this monthly test requirement will revert to quarterly in the months specified above. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Environmental Management indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include alternate monitoring requirements or limits. NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival and appropriate environmental controls, shall constitute an invalid test and will require immediate retesting(within 30 days of initial monitoring event). Failure to submit suitable test results will constitute noncompliance with monitoring requirements. I. AMMONIA LIMIT An ammonia limit will be phased in to allow the City of Lenoir to do additional studies and modify the plant to meet the ammonia limits. As of July 1, 1995, an ammonia limit at the flow limit of 1.2 MGD is specified to protect Gunpowder Creek. The summer ammonia limit will be 2.3 mg/1 and the winter limit will be 5.5 mg/l.