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r�w <br /> I <br /> Associated Soils Analysis <br /> August 11,1994 <br /> File No 420-93 <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#100878, 1012 W Yosemite, Manteca, CA <br /> Dear Mr Cobb <br /> In accordance with your request, quarterly groundwater sampling was conducted at the above <br /> subject site on June 15, 1994 This quarterly work package includes a site data summary table, <br /> site groundwater gradient map (FIGURE 1), laboratory analyses, monitoring well sampling <br /> record, and sampling and purging protocol (ATTACHED) Our field and laboratory analyses <br /> were conducted in accordance with approved ASTM and EPA standards <br /> The site wells contained no measurable free product A slightly sour odor was noted in the <br /> water sample collected from Monitoring Well MWI Non-detect levels of petroleum <br /> constituents were present 1n the water samples collected from Wells MWI, MW3, MW4, MW6 <br /> and MW7 during the previous quarter sampling oat May 2, 1994 However, petroleum <br /> constituents were detected in water samples collected from all eight monitoring wells this <br /> quarter Hydrocarbon levels in all other wells increased significantly since last quarter <br /> Groundwater depths at the site have increased by about 0 92 to 1 10 feet relative to last <br /> quarter, indicating that the groundwater table has lowered A site groundwater gradient was <br /> determined by calculating the groundwater elevation in each well (SUMMARY TABLE) and <br /> triangulating the elevation data between the wells (FIGURE 1) The gradient is currently <br /> flowing toward the north at a magnitude ranging from 0 006 to 0 005 foot per foot The current <br /> groundwater gradient pattern has a similar magnitude and the same general direction as in the <br /> previous quarter's results I <br /> If you have any questions about these results,please contact our office <br /> Sincerely, <br /> ASSOCIATED SOILS ANALYSIS,INC. <br /> m o <br /> R GY5574 wGarI th n 6 Na. 5674' a <br /> �F pe,q ~ <br /> GJC GMS/tp <br /> 'II I 1141 Batavia Ct • Tulare, California 93274 + (209) 688-1011 <br /> I v I II `I I 'I,r <br />