Laserfiche WebLink
D. Impaired Water Bodies on CWA 303(d) List <br /> In November 2006, USEPA approved a revised list of impaired water bodies prepared pursuant <br /> to CWA section 303(d), which requires identification of specific waterbodies where it is <br /> expected that water quality standards will not be met after implementation of technology-based <br /> effluent limitations on point sources. In November 2010,USEPA partially approved an updated <br /> 303(d) list. Where it has not already done so, the Regional Water Board plans to adopt Total <br /> Maximum Daily Loads(TMDLs) for pollutants on the 303(d) list. TMDLs establish wasteload <br /> allocations for point sources and load allocations for non-point source sand are established to <br /> achieve the water quality standards for the impaired waterbodies. The SIP requires final effluent <br /> limitations for a11303(d)-listed pollutants to be based on total maximum daily loads and <br /> associated waste load allocations. <br /> IV.RATIONALE FOR EFFLUENT LIMITATIONS AND DISCHARGE SPECIFICATIONS <br /> The CWA requires point source dischargers to control the amount of conventional,non- <br /> conventional,and toxic pollutants that are discharged into the waters of the United States. The <br /> control of pollutants discharged is established through effluent limitations and other requirements in <br /> NPDES permits. There are two principal bases for effluent limitations in 40CFR: Section 122.44(a) <br /> requires that permits include applicable technology-based limitations and standards; and Section <br /> 122.44(d)requires that permits include water quality-based effluent limitations to attain and <br /> maintain applicable numeric and narrative water quality criteria to protect the beneficial uses of the <br /> receiving water. <br /> Several specific factors affecting the development of limitations and requirements in this Order are <br /> discussed as follows: <br /> A. Discharge Prohibitions <br /> 1. Prohibition III.A (Unauthorized discharges of extracted and treated groundwater are <br /> prohibited): This discharge prohibition is retained from the previously issued Fuel and <br /> VOC General Permits and is based on CWC section 13260, which requires filing of a report <br /> of waste discharge (ROWD)before discharges can occur. Discharges which have not been <br /> described in a Discharger's NOI are prohibited. <br /> 2. Prohibition III.B(Discharges of effluent other than extracted groundwater treated only <br /> with approved chemicals are prohibited): This prohibition is retained from the previously <br /> issued Fuel and VOC General Permits and is based on the fact that the requirements in the <br /> Order were developed for discharges of treated groundwater from VOC or fuel-contaminated <br /> groundwater sites so only discharges associated with this type of activity can be pernutted <br /> under this Order. <br /> 3. Prohibition III.0 (Discharges in excess of the authorized flow rate are prohibited): This <br /> prohibition is retained from the previously issued Fuel and VOC General Pertnits. The basis <br /> for the prohibition is the same rationale documented for Prohibition III.A. Dischargers have <br /> submitted NOIs that included a description of treatment facility design and the maximum <br /> Attachment F—Fact Sheet F-11 <br /> For VOC and Fuel General NPDES Permit No.CAG912002 <br />