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8o0 E. Sf, e /a o /�wy California Regional Water Quality Control Board Central Valley Region } Robert Schneider,Chair Winston H. Hickoz Gray Davis Secretaryfor Sacramento Main Office Governor Environmental Internet Address: http://www.swrcb.ca.gov/--rwgcb5 Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 Phone(916)255-3000•FAX(916)255-3015 21 February 2001 Chandler Martin Vincent Estell and Landmark Lathrop'Group San Joaquin County Comm. Develop. Dept. c/o Triple "E" Engineering and Survey Company 1810 E. Hazelton Ave. 15810 S. Harlan Road Stockton, CA 95205 Lathrop, CA 95330 QX-00-01 LANDMARK LATHROP GROUP, Q UARR Y EXCA VA TION APPLICA TION, SCH 001022007, MANTECA, SAN JOA QUIN COUNTY, I have reviewed the Negative Declaration for Aggregate Mining near Manteca, San Joaquin County distributed by the State Clearinghouse. The project number is SCH 2001022007. The document briefly describes plans to excavate 60 acres of a 162 acre parcel; all excavations will remain above the groundwater table. The Negative Declaration doesn't indicate if the excavated material will be processed on site. If wastewater is generated (including wash water used to separate fines from sand or gravel) Waste Discharge Requirements (WDRs) will be required for the discharge of the process water into settling basins at the site. Landmark Lathrop Group shall submit a Report of Waste Discharge (RWD) at least 120 days prior to discharging wastewater at the site. Submittal of the RWD is required by California Water Code Section 13260. If groundwater dewatering is required, Landmark Lathrop Group shall submit a RWD to apply for a National Pollutant Discharge Elimination System (NPDES)permit. Depending on the Standard Industrial Classification (SIC) code of the final project, compliance with the National Pollutant Discharge Elimination System (NPDES) General Permit No. CAS000001 for Discharges of Storm Water Associated With Industrial Activities may be required. The SIC codes of activities requiring coverage are listed in the General Permit. In order to obtain coverage by the General Permit, the proponent must submit a Notice of Intent to comply with the permit (NOI) to the State Water Resources Control Board and a Storm Water Pollution Prevention Plan (SWPPP) must be prepared. Because construction associated with the project will disturb more than five acres or is part of a larger common plan of development that encompasses five or more acres, the property owner needs to obtain permit coverage under the National Pollutant Discharge Elimination System (NPDES) General Permit No. CAS000002 for Discharges of Storm Water Associated With Construction Activity. Before construction begins, the proponent must submit an NOI to comply with the permit to the State Water Resources Control Board and a SWPPP must be prepared. If there are any questions about this process or the storm water program, you may call Dani Berchtold at (916) 255-3383 or Leo Sarmiento at(916) 255-3049. Additional information can be found at the Storm Water website - http://www.swrcb.ca.govlstormwtr/index.htm 1. California Environmental Protection Agency �a Recycled Paper The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. For a list of simple ways you can reduce demand and cut your energy costs,see our Web-site at http://www.swrcb.ca.gov/rwgcb5