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Kim Donovan -2- 21 July 2019 <br /> Stockton District Wide Potable <br /> Water Service Maintenance Project <br /> Section 5.3 of the SIP allows "exceptions from meeting the Priority Pollutant criterialobjectives <br /> if determined to be necessary to implement control measures..." The Discharger is requesting <br /> an exception from the CTR requirements under the SIP Categorical Exceptions, Item Number <br /> 2, regarding drinking water conducted to fulfill statutory requirements under the California <br /> Health and Safety Code, in accordance with the California Department of Public Health, Title <br /> 22, requirements and water quality standards. Therefore, the Discharger(s)qualified for the <br /> SIP exception in Section 5.3 and are not required to conduct Priority Pollutant (CTR <br /> constituent) sampling. <br /> Dischargers authorized to discharge under this Low Threat General Order who have been <br /> granted an exception to the priority pollutant criteria and objectives in the SIP, must provide <br /> certification by a qualified biologist that the beneficial uses of the receiving water have been <br /> restored upon completion of the discharge. <br /> The receiving waters were identified as the Sacramento-San Joaquin Delta which is listed <br /> under the Clean Water Act 303(d) List of impaired water bodies. The Discharger submitted <br /> lab data that show non-detection for the constituents on the 303(d) List. <br /> PROJECT DESCRIPTION <br /> Stockton District Wide Potable Water System (System) consists of over 520 miles of <br /> distribution system pipelines, servicing over 49,000 connections. The System also includes 13 <br /> storage tanks, 11 booster pump stations, over 3,700 fire hydrants including blow off valves, <br /> -and over 30 groundwater wells. Nearly every well in the System has orthorphosphate <br /> treatment to remove iron and manganese. <br /> The Discharger will dechlorinate all potable water discharges and will conduct any necessary <br /> treatment from their potable water system to comply with the Effluent and Receiving Water <br /> Limitations contained in General Order No. R5-2008-0081 prior to discharging Into surface <br /> waters. -Discharges are generally to the nearest storm drain inlet located within the . <br /> Discharger's property boundaries and within the vicinity of the respective groundwater wells or <br /> distribution system's point of discharge. All of the receiving waters are.tributary to the <br /> Sacramento-San Joaquin Delta. <br /> MONITORING AND REPORTING <br /> All Dischargers must notify Central Valley Water Board staff 24 hours before the start of each <br /> new discharge, as soon as noncompliance is anticipated, and when the discharge ceases. <br /> This is a water supply project with numerous discharge points. Therefore, the Discharger was <br /> required to submit a Pollution Prevention and Monitoring and Reporting Program (PPMRP) <br /> with the NOI. The PPMRP dated 7 June 2011 complies with Attachment H and with Sections <br /> I, IX, and X of Attachment E of the Low Threat General Order, and is hereby approved. <br /> Effluent and receiving water analytical monitoring shall be conducted as described in the <br /> approved PPMRP and the results submitted to the Central Valley Water Board on a quarterly <br /> basis unless specified otherwise. The Discharger must submit quarterly reports, as described <br /> in Attachment E, Section X, even if there is no discharge or receiving water flow during the <br /> reporting quarter, until the Discharger formally requests that coverage under this Order be <br /> terminated. <br />