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Californiaconal Water Quality Cont I Board <br /> N�N P69 <br /> Central Valley Region <br /> H - <br /> Karl E. Longley,Sc D, P.E.,Chair <br /> Linda S :\damsArnold <br /> Sacramento Main Office Schwarzenegger <br /> 11020 Sun Center Drive#200.Rancho Cordova,California 956706114 <br /> I.uruonni.n¢d Governor <br /> Prmzcnan Phone(916)4643291 •FAX(916)464-4645 <br /> http,/hvwwwaterboards.ca.gov/centralvalley �1`/'` II�'I <br /> 28 May 2008 IR IE C E <br /> Mr. Gil Moore MAY 2 9 -008 <br /> New West Petroleum, Inc. ENVIRONMENT HEALTH <br /> 1831 16th Street PERMIT/SERVICES <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 First Quarter 2008 <br /> Groundwater Monitoring and Remediation System Status Report (1Q2008 Report), submitted <br /> 21 May 2008 and 21 April 2008 respectively by your consultant Closure Solutions, Inc. (CSI). <br /> The Request provides the results of a technical review of the data collected to date from <br /> groundwater monitoring of individual wells (enclosed Figure 1) conducted under Regional Board <br /> Cleanup and Abatement Order No. R5-2007-0709 (CAO) and Regional Board Monitoring and <br /> Reporting Program R5-2007-0808 (MRP). The CAO requires compliance with the MRP <br /> schedule, which in turn requires quarterly groundwater monitoring and the full list of analyses for <br /> all monitoring wells (MW's) and municipal wells CSA-31 Well 1 and CSA-31 Well 2. The <br /> Request recommends the following changes to the MRP in Request, Table 1 Recommended <br /> Sampling Frequency and Analyte Reductions (enclosed): <br /> • No changes to CSA-31 Well 1 and CSA-31 Well 2 schedules and analyses. <br /> • MW-1 would be sampled annually for all analytes during the second quarter of each <br /> calendar year, <br /> • MW-2, MW-5A and MW-5B would be sampled semi-annually for all analyses during the <br /> second and fourth quarters of each calendar year, and <br /> • MW-2 through MW-9D would be sampled <br /> 1. Annually (second quarter) for constituents total petroleum hydrocarbons as <br /> gasoline (TPHg), and benzene, toluene, ethylbenzene, and xylenes (collectively <br /> as BTEX), and <br /> 2. Quarterly for constituents methyl tert-butyl ether (MtBE), ethanol, methanol, <br /> tertiary butyl alcohol (TBA), tertiary amyl methyl ether (TAME), di-isopropyl ether <br /> (DIPE), and ethyl tertiary butyl ether (ETBE). <br /> Comments: <br /> 1. The Request did not include the data set that was evaluated. However, I also reviewed <br /> the most recent 1 Q2008 Report Table 2, which does include all of the historical data for <br /> the wells. Please include a copy of the most recent Table 2 in future requests for <br /> changes in the MRP sampling frequency. <br /> 2. The Request proposes the annual sampling event be changed from the fourth quarter to <br /> the second quarter without providing a technical rationale for the change. The MRP <br /> California Environmental Protection Agency <br /> 0 Recycled Paper <br />