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California Regional Water Quality Control Board .- ' , <br /> Central Valley Region <br /> Robert Schneider,Chair M <br /> Winston H.Hickox Gray Davis <br /> Secretaryfor Sacramento Main Office Governor <br /> Environmental Internet Address: http://www.swrcb.ca.gov/rwgcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003@O�n @� <br /> Phone(916)255-3000•FAX(916)255-3015 @ II �' v <br /> 2 August 2002 AUG 0 7 2002 <br /> B. D. Davis ENVIRONMENT HEALTH <br /> Pacific Gas and Electric Company PERMIT/SERVICES <br /> 375 North Wiget Lane, Suite 250 <br /> Walnut Creek, CA 94598-2412 <br /> REVIEW OF APRIL 2002 SEMI-ANNUAL GROUNDWATER MONITORING REPOR T FOR <br /> FORMER CLASS II SURFACE IMPOUNDMENTS, PG&E MCDONALD ISLAND GAS STORAGE <br /> FACILITY, McDONALD ISLAND, SAN JOAQUIN COUNTY(Case File No. 2288) <br /> Regional Board staff has reviewed the above referenced report, dated 14 June 2002. We find that the <br /> report is complete as shown on the attached Monitoring Report Compliance Checklist. In summary, the <br /> report states that there are slight upward trends for chloride, sodium, TDS &EC in MW-2 and sulfate in <br /> MW-8. Constituents of concern (COCs) are greater than background in MW-1RD, MW-2, -3, -6, -9 and <br /> —11. Mann-Kendall trend analysis shows an upward trend in MW-2. <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. This issue was discussed with Nancy Hendrickson via telephone on 1 August 2002. <br /> If you have any questions, please contact me at (916) 255-3137 or schwabk@rb5s.swrcb.ca.gov. <br /> 4:z 6�t VXJC(//— <br /> KIM <br /> A. SCHWAB, R.G. <br /> Associate Engineering Geologist <br /> Attachment <br /> cc: Director, San Joaquin County Environmental Health Division, Stockton <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.gov/rwgcb5 <br />