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Mr. Brian Cobb <br /> July 27, 1995 <br /> Page 2 <br /> Summary of Findings <br /> Field data collected during the sampling event indicate groundwater elevations have increased <br /> significantly relative to last quarter. Groundwater was identified as flowing to the southeast <br /> and southwest, under average gradients ranging between approximately 0 001 and 0.01 feet <br /> per foot. Analytical Iaboratory results show a decrease in petroleum hydrocarbon constituents <br /> in the samples collected from wells MW-1, MW-2, MW-3, MW-4, MW-5 and MW-8; all <br /> other wells showed no significant change in concentration. A summary of the depth-to-water <br /> measurements, calculated groundwater elevations, and analytical results are included in <br /> Table 1. A groundwater contour map, identifying the primary groundwater flow directions <br /> on June 20, 1995 and the analytical results, is included as Figure 1. Field notes, the chain-of- <br /> custody form and the laboratory data sheets are included in Attachment A. <br /> If you have any question regarding the information presented herein, please contact one of <br /> us at your earliest convenience. <br /> t <br /> Sincerely, <br /> BROWN AND CALDWELL <br /> Todd Miller <br /> Projectanag <br /> Jay cas Y <br /> California Registered Geologist No. 4301 <br /> TM/PC/lkg <br /> Attachments ' <br /> cc: Mr. John Reeves, Attorney at Law - <br /> Ms. Linda Turkatte, San Joaquin County Public Health Services Department <br /> r <br /> 01/IVVaUJMIX7qrRLYRMIW9MIST 19n W" <br /> i <br /> HPIMWM <br /> Brown and Caldwell , <br /> Consultants - <br />