Laserfiche WebLink
California tonal Water Quality Cool Board <br /> l\j Central Valley Region 1 <br /> Karl E. Longley, ScD, P.E., Chair l <br /> Linda S. Adams Arnold <br /> Secretary for 11020 Sun Center Drive #200, Rancho Cordova, California 95670-6114 Schwarzenegger <br /> Environmental Phone (916) 464-3291 • FAX (916)464-4645 Governor <br /> Protection http://www.waterboar �w/ce�ntr pgy <br /> J <br /> 23 February 2009 <br /> FF� <br /> Mr. Gil Moore <br /> New West Petroleum, Inc. <br /> 1831 16'" Street <br /> Sacramento, CA 95814 <br /> DOCUMENTS REVIEW, NEW WEST PETROLEUM#1003 (SHELL BRANDED), <br /> 6437 BANNER STREET, LODI, SAN JOAQUIN COUNTY(CAO R-5-2007-0709) <br /> I reviewed the Reduced Monitoring Frequency Request (Request) and the Fourth Quarter 2008 <br /> Groundwater Monitoring and Remediation System Status Report (Report), submitted 19 February 2009 <br /> and 30 January 2009, respectively, by your consultant Closure Solutions, Inc. (CSI). The Request <br /> provides the CSI technical rationale for reductions in monitoring of individual wells conducted under <br /> Regional Board Cleanup and Abatement Order No. R5-2007-0709 (CAO) and Monitoring and Reporting <br /> Program R5-2007-0808 (MRP). The CAO requires compliance with the MRP schedule, which in turn <br /> requires quarterly, semiannual, and annual groundwater monitoring as applicable, and the full list of <br /> analyses for all monitoring and extraction wells (MW's and EW's) and the two municipal wells <br /> (CSA-31 Well 1 and CSA-31 Well 2). <br /> The Request recommends the following changes to the CAO and MRP: <br /> • MW-9B, MW-9C, and MW-9D (guard wells for CSA-31 Well 2) would be sampled quarterly, the <br /> analyses would be reduced to methyl tert-butyl ether (MTBE). <br /> • New groundwater extraction wells EW-6A, EW-7A, EW-7B, EW-8B, EW-9B and EW-10A would <br /> begin quarterly monitoring for MTBE. <br /> • MW-413, MW-7A. MW-8B, EW-4, and EW-5 would be sampled semi-annually in the second and <br /> fourth quarters; the analyses would be reduced to MTBE. <br /> • All remaining wells not listed above (including CSA-31 Well 1 and Well 2 municipal wells) would <br /> be sampled annually during the fourth quarter; the analyses would be reduced to MTBE. <br /> The Report provided the results of quarterly monitoring conducted 12 November 2008. Maximum MTBE <br /> concentrations were: <br /> • Zone A, 1,000 micrograms per Liter (ug/L, MW-7A). <br /> • Zone B, 360 ug/L (MW-8B). <br /> • Extraction wells, 130 ug/L (EW-4) and 33 ug/L (EW-5). <br /> Approximately 0.37 pounds of MTBE were removed during the 4`" quarter, for a cumulative 115.88 <br /> pounds of MTBE removed to date. Six new extraction wells (EW-6A, EW-7A, EW-713, EW-86, EW-913 <br /> California Environmental Protection Agency <br /> Of Recycled Paper <br />