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PUBLIC HEALTH SERVICES <br /> G <br /> SAN JOAQUIN COUNTY 2' : <br /> Q: <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M,D., M.P.H., Health Officer �...y�... P <br /> N. <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 4e/POR <br /> 209/468-3420 <br /> PAULINE MARQUAND JUN 2 0 2000 <br /> C/O SHAWN KELLY M & M BUILDERS SUPPLY <br /> P O BOX 1107 <br /> TRACY CA 95378-1107 <br /> RE: M & M Builders Supply SITE CODE: 1530 <br /> 8111 W. Eleventh Street <br /> Tracy CA 95376 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has <br /> reviewed the "Preliminary Site Assessment Investigation" dated May 10, 2000 that was <br /> prepared by Wright Environmental Services, Inc. (Wright) on behalf of the above referenced site <br /> and has the following comments. <br /> The report details the results from fieldwork performed on March 17, 2000, when a series of five <br /> soil borings were advanced on site. Soil and grab groundwater samples were collected for <br /> analysis from each boring, and a water sample was collected from an on-site domestic well. <br /> Results of the soil sample analyses indicate some residual petroleum hydrocarbon <br /> contamination remains in the area of the former tank pits. Results of the water sample analyses <br /> indicate that there has been a petroleum hydrocarbon impact to groundwater. All water <br /> samples, including the one collected from the domestic well, had total petroleum hydrocarbons <br /> as diesel (TPHd). Quantities ranged from 69-270,000 parts per billion (ppb). The water sample <br /> from boring B-1 also had TPH as gasoline, ethylbenzene and xylene. The vertical and lateral <br /> extent of the groundwater contamination remains undefined. <br /> The report suggests that the TPHd reported in the domestic well may be from another source. <br /> To prove this, another source area must be identified, and contamination must be shown to be <br /> coming on to this site from that source area. There is a documented source of groundwater <br /> contamination at this site, which must be defined. <br /> Please prepare a work plan to define the vertical and lateral extent of the groundwater <br /> contamination and to install groundwater-monitoring wells. Submit the work plan to PHS/EHD <br /> by August 2, 2000. If you have any questions please call Lori Duncan at (209)468-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> 1-221 Cl (11(1w1/e1 <br /> Lori Duncan, Senior REHS Margare Lagorio, REHS <br /> LOP/Site Mitigation Unit IV Supervisor, Unit IV <br /> cc: Marty Hartzell, CVRWQCB <br /> John Lynch, Wright <br /> A Division of San Joaquin County Health Care Services <br />