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Californi*egional Water Quality Cool Board <br /> k <br /> Central Valley Region <br /> Karl E.Longley,ScD,P.E.,Chair <br /> Linda S.Adams 11020 Sun Center Drive#200,Rancho Cordova,California 95670-6114 Arnold <br /> Secretaryfor Phone(916)464-3291 •FAX(916)464-4645 Schwarzenegger <br /> Environmental hitp://www.waterboards.ca.gov/centralvalley Governor <br /> Protection <br /> 5 May 2009 <br /> Ms. Anne Conner <br /> Pacific Gas and Electric Company <br /> 375 North Wiget Lane, Suite 200 <br /> Walnut Creek, California 94598 <br /> RECISSION OF WASTE DISCHARGE REQUIREMENT ORDER NO. 96-176 FOR THE <br /> FORMER CLASS H SURFACE IMPOUNDMENTS, MCDONALD ISLAND GAS STORAGE <br /> FACILITY, SAN JOAQUIN COUNTY <br /> The Central Valley Regional Water Quality Control Board (Central Valley Water Board) <br /> rescinded Waste Discharge Requirement (WDR) Order No. 96-176 in an uncontested item <br /> during its April Board meeting. The Class II Surface Impoundments were clean closed as <br /> corrective action and the Discharger (Pacific Gas and Electric) had been conducting continued <br /> groundwater monitoring to evaluate the effectiveness of the corrective action. The rescission <br /> of the WDR was supported by an extensive groundwater monitoring program evaluation, <br /> additional site sampling both for soils and groundwater, and geochemical modeling providing <br /> evidence the Class II surface Impoundments were not affecting water quality beneath the site. <br /> Groundwater monitoring and reporting in accordance with the WDRs and the Monitoring and <br /> Reporting Program are no longer required to be submitted to the Central Valley Water Board. <br /> Groundwater monitoring wells can be scheduled for destruction once an appropriate work plan <br /> and permits have been approved by San Joaquin County Environmental Health. The wells <br /> must be destroyed per San Joaquin County guidelines. Please notify staff a minimum of 48 <br /> hours in advance of the scheduled well destruction. <br /> Attached is Order No. R5-2009-0057 rescinding WDR Order No. 96-176. If you have any <br /> questions please call me at (916) 464-4737. <br /> i <br /> TOLAEL FRATE, PG <br /> Engineering Geologist <br /> Compliance and Enforcement <br /> Title 27 and Non 15 Programs <br /> Attachment: Order No. R5-2009-0057 <br /> cc- Robert McClellon, San Joaquin County Environmental Health Division, Stockton <br /> California Environmental Protection Agency <br /> C5Recycled Paper <br />