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ENVIRONMENTAL HEALTH DEPARTMENT <br /> PpUIN SAN JOAQUIN COUNTY Unit Supervisors <br /> Donna K.Heran,R.E.H.S. Carl Borgman,R.E.H.S. <br /> Director <br /> 304 East Weber Avenue, Third Floor Mike Huggins,R.E.H.S.,R.D.I. <br /> * Al Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson,R.E.H.S. <br /> .,Cq ..;p• Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Laurie A.Cotulla,R.E.H.S. Fax: (209) 464-0138 Robert McClellan,R.E.H.S. <br /> Program Manager Mark Barcellos,R.E.H.S. <br /> APR 0 9 2002 <br /> PAULINE 14ARQUAND <br /> C/O SHAWN KELLY M & M BUILDERS <br /> P O BOX 1107 <br /> TRACY CA 95378-1107 <br /> RE: M & M Builders Supply SITE CODE: 1530 <br /> 8111 Eleventh Street <br /> Tracy CA 95376 <br /> San Joaquin County Environmental Health Department (SJC/EHD) has reviewed the <br /> "Quarterly Groundwater Monitoring Report" dated March 11, 20014hat was prepared on <br /> your behalf by Wright Environmental Services, Inc. and has the following comments. <br /> The report documents the groundwater monitoring and sampling event that took place on <br /> December 14, 2001, and the sampling of two domestic well located adjacent to the <br /> subject property that took place on February 7, 2002. Analytical results from the <br /> groundwater samples were non-detect for all constituents analyzed, except for 170 <br /> micrograms per liter of total petroleum hydrocarbons as diesel in MW-3. <br /> The report recommends reviewing the site for closure following three more quarters of <br /> groundwater monitoring and sampling, and discontinuing sampling of the domestic wells. <br /> SJC/EHD agrees with the first recommendation, but not the second. As this was the first <br /> quarter that both domestic wells were sampled from proper sample ports installed at each <br /> well head, a confirmation round of samples must be collected and analyzed from each. If <br /> the analytical results confirm the non-detect results, then sampling of the two domestic <br /> wells can be discontinued. <br /> In the future, please be sure to include in the Quarterly Groundwater Monitoring and <br /> Sampling Reports all historical groundwater monitoring data in cumulative data tables. <br /> If you have any questions or comments please call Lori Duncan at(209) 468-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Department <br /> Lori Duncan, Senior REHS MargarefLagorio, Supervising REHS <br /> LOP/Site Mitigation Unit IV LOP/Site Mitigation Unit IV <br /> cc: Marty Hartzell, CVRWQCB <br /> John Lynch, Wright Environmental Services, Inc. <br />