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GROUND ZERO ANALYSIS, INC. <br /> .� JAN 2 0 2004 <br /> 1714 Main Street <br /> Escalon,Cahforma 95320-1927 ENVIRONMENT HEALTH <br /> Telephone (209)838-9888 PERMIT/SERVICES <br /> Facstmde (209)838-9883 <br /> January 16, 2004 <br /> Mr Jeff Wong <br /> San Joaquin County <br /> Environmental Health Department <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 <br /> • Subject Third Quarter 2003 Groundwater Monitoring and Sampling Report <br /> Speedy Mart, 8200 N Highway 99,Morada, CA <br /> Dear Mr Wong <br /> This letter report summarizes the Third Quarter 2003 groundwater monitoring and sampling <br /> activities at the subject site Figure 1 presents a site vicinity map <br /> 1.0 SITE ACTIVITIES <br /> Activities at the site included removing free product from well MW1, monitoring groundwater <br /> levels in all site wells, purging and sampling groundwater from wells MW2 through MW9B, and <br /> analyzing groundwater samples for the presence of gasoline constituents <br /> 2.0 FIELD WORK <br /> 2.1 Free Product Measurement and Recovery <br /> As an interim remedial action, Ground Zero is removing product from well MW1 Between August <br /> 16, 2001 and September 30, 2003 a total of 161 53 gallons of product/water mixture has been <br /> extracted by either manually bailing the well, or through the operation of a passive skimmer, and <br /> transferring the liquid into properly labeled DOT-approved 55-gallon drums in accordance with 49 <br /> CFR part 172 and 40 CFR part 262 <br /> A Ground Zero technician measured free product thickness and removed approximately 30 gallons <br /> of product/water mixture from well MW1 during the reporting period A passive skimmer was <br /> installed in the well on May 19, 2003 Table 1 summarizes the measured product thickness and <br /> . volume removed from well MW 1 since August 16, 2001 Attachment A contains copies of field <br /> logs related to product monitoring and removal during the reporting period <br /> G%GROUNDZEITULEBURG\RcportslQMR1200313QM2003 doe <br />