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California (_Yllonal Water Quality Con -,)I Board <br /> Central Valley Regio <br /> K111-1 L. Sci). 11.1-_ Chair <br /> Linda S. 1d;II11, 11111d <br /> Sacramento N11:611 Off-ice Im <br /> 1 1020 Sill,I Ill, (cif d"%a, altiolma <br /> lih.fiun I'll, N 19 1 h i pAl <br /> Imp %N ii1ci h,1;iI LIS u:prat clillak alln <br /> 3: �3 <br /> April 27. 2007 <br /> Mr. Dennis Zaragoza, Esq. <br /> Attorney at Law <br /> P, O. Box 2190 <br /> San Francisco, CA 94126-2190 <br /> REVIEW OF PROPOSED WELL SAMPLING PROGRAM AND PROPOSED ADDITIONAL <br /> DEEP MONITORING WELL, FORMER BUSY BEE CLEANERS, 40 NORTH MAIN STREET, <br /> LODI, SAN JOAQUIN COUNTY <br /> Staff of the California Regional Water Quality Control Board. Central Valley Region (Regional <br /> Water Board) has reviewed the Proposed Well Sampling Program and Proposed Additionill <br /> Deep Groundwater Monitoring Well for the Former Busy Bee Cleaners (the Site), 40 North <br /> Main Street. Lodi, San Joaquin County. The letter is dated March 22. 2007, and was received <br /> by the Regional Water Board on March 27. 2007. Your environmental consultant, E2C <br /> Remediation, Inc., of Bakersfield prepared the letter on behalf of the representatives of the <br /> Busy Bee Site and the City of Lodi. <br /> The purpose of this letter is to present the tentative agreements reached in a November 3. <br /> 2006 meeting between the representatives of the Busy Bee Site and the City of Lodi. propose <br /> modifications to the sampling program as jointly developed by the representatives of the Busy <br /> Bee Site and the City of Lodi, and propose one additional deep monitoring well. <br /> The Regional Water Board concurs with the proposal to install one additional deep monitoring <br /> well, and with the proposed location. After four quarters of monitoring data are obtained and <br /> evaluated from the new deep well, a determination can be made if continued quarterly <br /> monitoring data is needed, or if monitoring frequency can be reduced to semiannual. <br /> The Regional Water Board has the following comments on the proposed modifications to the <br /> existing groundwater monitoring well sampling program. First, staff request clarification <br /> concerning the proposed frequency of monitoring for DW-3BB. In the text, this well is <br /> recommended for annual sampling. though Figure 1 has the semi-annual symbol associated <br /> with this well. Second, staff finds that DW-3BB should be sampled on a semi-annual basis. <br /> We believe that one deep well beneath the lower portion of the shallow plume should be <br /> monitored semi-annually, like it is recommended to sample DW-1 BB semi-annually to monitor <br /> the deep zone beneath the upper portion of the shallow plume. Third, staff recommends that <br /> MVV-15BB and MW-17BB be monitored on a semi-annual basis instead of the proposed <br /> annual sampling. Our concern is that an annual check is not sufficient at the present tir-ne to <br /> monitor the down-gradient lateral extremities of the existing plume. Once the soil vapor <br /> extraction combined with groundwater air sparging remedy is implemented. then the proposal <br /> to monitor MVV-15BB and MW-17BB annually can be reevaluated. <br /> Califi)rnla Environmental ProtectionAgenc.1, <br />