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PUBLIC HtALTH SERVI C <br /> owb <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor - Stockton, CA 95202 <br /> 209/468-3420 <br /> PETER LENZ JUN 1 9 2000 <br /> 6465 PACIFIC AVE #134 <br /> STOCKTON CA 95207 <br /> RE: Howard Lenz Property SITE CODE: 2181 <br /> 1648 Shaw Road <br /> Stockton CA 95215 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) <br /> has reviewed the "Quarterly Report— First Quarter 2000" dated June 6, 2000, that was <br /> submitted by Advanced GeoEnvi ron mental, Inc. (AGE) on behalf of the above <br /> referenced site and has the following comments. <br /> The report documents the February 2000 installation of three dual completed wells and <br /> one soil boring. The dual completed wells have two casings in each boring, one <br /> screened to be a groundwater monitoring well (MW)and one screened to be a vapor <br /> extraction well (VW). The monitoring wells were developed and sampled in March 2000. <br /> Data collected from this site to date suggests that the core of the petroleum hydrocarbon <br /> contamination in soil extends to approximately 30-feet below surface grade (bsg) <br /> vertically, and is bounded laterally by soil borings B-2, B-4, B-6 and MW-3. Results of <br /> the monitoring well sample analyses indicate that the vertical and lateral extent of the <br /> contaminant plume in water has not been defined. <br /> Quarterly groundwater monitoring should continue at this site until further notice from <br /> PHS/EHD. Please prepare a work plan to define the vertical and lateral extent of the <br /> groundwater contaminant plume and submit it to PHS/EHD by July 31, 2000. If you <br /> have any questions or comments please call Lori Duncan at(209)468-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Lori Duncan, Senior REHS Marga etLagorAio, REHS� <br /> LOP/Site Mitigation Unit IV Supervisor, Unit IV <br /> cc: Marty Hartzell, CVRWQCB <br /> Bob Marty, AGE <br /> A Division of San Joaquin County Health Care Services <br />