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California Regional Water and <br /> ' g' Quay, 4 99 A�R <br /> Central Valley Region r'FTME <br /> Robert Schneider,Chair <br /> Winston H.Hickos 03 ��Q 2 P14 (' 21 Gray Davis <br /> Secretaryfor Sacramento Main Office Governor <br /> Enviotection l Internet Address: http://www.swrcb.ca.gov/rwgcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> 24 August 2003 <br /> B. D. Davis <br /> Pacific Gas and Electric Company <br /> 375 North Wiget Lane, Suite 250 <br /> Walnut Creek, CA 94598-2412 <br /> REVIEW OF OCTOBER 2002 AND JUNE 2003 SEMI-ANNUAL GROUNDWATER <br /> MONITORING REPORTS FOR FORMER CLASS II SURFACE IMPOUNDMENTS, PG&E <br /> MCDONALD ISLAND GAS STORAGE FACILITY, McDONALD ISLAND, SAN JOAQUIN <br /> COUNTY, FACILITY ID 5B392025001 <br /> Regional Board staff has reviewed the above referenced reports, dated 14 January 2003 and 14 June <br /> 2003, respectively. We find that the reports are complete as shown on the attached Monitoring Report <br /> Compliance Checklist. In summary, the concentrations of constituents of concern are fluctuating <br /> slightly. Comparison of chloride in MW-1RD to model shows that concentrations are on track with <br /> predicted levels. <br /> We note your request to revise Monitoring and Reporting Program Order No. 96-176 reduce semi- <br /> annual monitoring to annual monitoring. Because COCs are greater than background concentrations and <br /> some wells are showing increasing trends in the data, we maintain that semi-annual monitoring continue, <br /> at a minimum. We agree that annual reporting may be applicable to this site as long as a comprehensive <br /> evaluation of the data is completed. The MRP must be revised in order to make this change. Please <br /> continue semiannual monitoring according to WDRs 96-176. <br /> If you have any questions, please contact me at (916) 255-3137 or schwabk@rb5s.swrcb.ca.gov. <br /> 'd�� - <br /> KIM A. SCHWAB, R.G. <br /> Engineering Geologist <br /> Attachment <br /> cc: Robert McClellon, San Joaquin County Environmental Health Division, Stockton <br /> Paul Bertucci, CH2M Hill, 155 Grand Avenue, Ste. 1000, Oakland, CA <br /> California Environmental Protection Agency <br /> 0 Recycled Paper <br /> The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. <br /> For a list of simple ways you can reduce demand and cut your energy costs,see our Web-site at http://www.swrcb.ca.00v/rwgcb5 <br />