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} <br /> g � <br /> ALTH <br /> e. <br /> Associated Soils AfiaI0141 . <br /> February 21, 1994 <br /> File No. 420-93 <br /> r <br /> J <br /> Brian Cobb <br /> E-Z Serve Management Company <br /> 2550 N.Loop West,Ste. 600 <br /> Houston,TX 77292 <br /> PROJECT: E-Z Serve Location #100966,2537 Waterloo Road, Stockton, CA <br /> Dear Mr.Cobb: <br /> i <br /> In accordance with your request; quarterly groundwater sampling was conducted:at the above <br /> subject site on December 9 and December 21, 1993. This quarterly work package includes a site <br /> data summary table, site groundwater gradient map (FIGURE 1), laboratory analyses of those <br /> " samples collected by ASA, monitoring well sampling record,and sampling and purging protocol <br /> (ATTACHED). Our field and laboratory analyses were conducted in accordance with approved <br /> ASTM and EPA standards. <br /> Three new wells were installed by HET, Inc. at the site since the last quarterly report. That ' <br /> company sampled the new wells on December 9, 1993,and resurveyed the old and t.Eie new wells <br /> to a common elevation datum. Associated Soils, Analysis, Inc. sampled the old wells on <br /> December 21. The gathering of all the new field data has resulted in delays in th'e production <br /> of this report (HET Inc. may have filed a separate report on the results of their sampling). The <br /> site wells contained no measurable free product, and no odors were reported orifi the purging <br /> record. Petroleum constituents were detected in each of the monitoring well samples except for <br /> MW-6, generally at similar levels as measured in the third quarter of 1993. <br /> Groundwater depths at the site have decreased relative to last quarter, indicating that the <br /> groundwater table is higher by about half a foot. A site groundwater gradient was determined <br /> by calculating the groundwater elevation in each well (SUMMARY TABLE) and contouring the <br /> elevation data (FIGURE 1). The site groundwater gradient currently flows priniarily toward <br /> the south at a magnitude varying from .0017 ft/ft .to the Southwest to .00043 ft/ft to the <br /> Southeast. <br /> If you have any questions about these results,please contact our office. <br /> 1 <br /> Sincerely, �df rah <br /> ASSOCIATED SOILS ANALYSIS,INC. GQ 30SEPH C4 �( <br /> 0 <br /> r <br /> No. 5574 <br /> Gary J. Cawtho i <br /> y. R.G.5574 D <br /> r <br /> GaF c� <br /> JC%tp <br /> 1 <br /> 1141 Batavia Ct. Tulare, California 93274.' 9 (209) 688-1'011 1 <br />