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r <br /> NfirAA.M. AS <br /> r ` <br /> "VICE <br /> 4 Working To Restore Nature <br /> 1710 Main Street ' I10V 3 PM L- 15 <br /> Escalon, CA 95320 <br /> Phone (209) 838-3507 <br /> FAX (209) 838-3509 <br /> November 2, 1993 <br /> Ms. Margaret Lagono <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P O Box 2009 <br /> Stockton, CA 95201 <br /> Subject Monitoring and Sampling Report <br /> June through September 1993 <br /> Holt Bros , Site Code 1988 <br /> 1541 West Charter Way, Stockton, California <br /> Ms Lagono <br /> This letter report will serve to document monitoring and sampling activities from June through <br /> September 1993 at the above referenced site (Figure 1) Groundwater monitoring and sampling <br /> was conducted on September 28 and 29, 1993 Activities included monitoring of the six <br /> groundwater wells on-site, sampling three groundwater monitoring wells for analysis of dissolved <br /> hydrocarbons and halogenated volatile organics and measuring the thickness of free product in <br /> well MW-1 <br /> GROUNDWATER MONITORING AND SAMPLING <br /> RESNA personnel performed groundwater monitoring and sampling on September 28 and 29, <br /> 1993 Field work consisted of measuring depth to water (DTW) and subjectively analyzing the <br /> water from wells MW2, MWS and MW6 for the presence of sheen and floating product Well <br /> locations are shown on Figure 2 The depth-to-water in the wells ranged from 25 55 to 27 32 <br /> feet below the top of the well casings, an average water level decrease of approximately 1 51 <br /> feet since the last monitoring event in March 1993 However, the decrease in water levels was <br /> not uniform across the site The average decrease in wells MW 1, MW2 and MW6 was 0 33 <br /> feet, while the average decrease in wells MW3, MW4, and MWS was 2 69 feet Groundwater <br /> monitoring data since December 1990 are summarized in Table 1 <br /> Prod Disk\Quart1y\QR-1043 FNL <br />