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I <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> Robert Schneider Chair <br /> Alan C.Lloyd Ph.D. Arnold Governor <br /> enegger <br /> Agency SecretarySacramento Main Office <br /> _- F '] temet�Addrcss:''http://w".waterboaids.cEi.gov/centralvalley/. <br /> r, 11020 Sun Center Drive,4200,Rancho Cordova,CA 956706114 <br /> Phone(9 i6)464=3291•FAX(916}4644780 <br /> 23 August 2005 <br /> Karla Kuhl Jeff Welch <br /> San Joaquin County Comm. Develop. Dept. Munn and Perkins <br /> 1810 E:Hazelton Ave. P.G. Box 4760 <br /> Stockton, CA 95205 , "' 'T` .'' " Modesto, CA 95352 <br /> 4 <br /> SCH NO. 2005082001,NOTICE OF COMPLETION, QUARRY EXCAVATION. ESCALON,'SAN <br /> JOAQUIN COUNTY <br /> I have reviewed the Notice of Completion distributed by the State Clearinghouse for an expansion of an <br /> existing aggregate mine in Escalon. The State Clearinghouse number is 2005082001. The document <br /> briefly describes plans to excavate 11.4 acres and transport the material to an existing processing facility. <br /> The processing facility is described in Waste Discharge Requirements (WDRs) Order No. 72-22. The <br /> WDRs do'nof adequately describe the activities proposed.-at the excavation site and must be revised. A <br /> Request fora Reportof Waste-Discharge Will be iransmltted separately to Munn and Perkins <br /> Waste Discharje'Rec�ire ments ", <br /> Because wastewater will be generated'and treated; stored, or disposed on site at the processing facility, <br /> WDRs are required, Because addition of new excavation areas is generally considered a material change <br /> in operations,'iri"accordance with California Water'Code'Section 13260, the project proponent shall <br /> submit a Report of Waste Discharge (RWD). <br /> Construction Stormwater Permit " <br /> A National Pollutant Discharge Elimination System(NPDES) General Permit for Storm Water <br /> Discharges Associated with Construction Activities, Order No. 99-28-DWQ is required when a project <br /> involves clearing, grading, disturbances to the ground, such as stockpiling, or excavation. Currently, <br /> construction activity that involves soil disturbances ori construction sites one acre or greater or which are <br /> part of a larger common plan of development or sale require a construction storm water permit. <br /> Because construction associated with the project will disturb more than one acre,the property owner <br /> needs to obtain permit coverage under the NPDES General Permit No. CAS000002 for Discharges of <br /> Storm Water Associated With Construction Activity. Before construction begins, the proponent must <br /> submit an NOI to comply with the permit to the State Water Resources Control Board and a Stormwater <br /> Pollution Prevention Plan (SWPPP) must be prepared. The permitting requirement applies both at the <br /> excavation site and the processing facility. <br /> Industrial Stormwater Permit <br /> Depending on the Standard Industrial Classification(SIC) code of the final project, compliance with the <br /> NPDES General Permit No. CAS000001 for Discharges of Storm Water Associated With Industrial <br /> California Environmental Protection Agency <br /> Q?Recycled Paper <br />