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KLEINFELDEF <br /> led. During purging and sampling, odors were detected, but no <br /> --� were pI rged and sampled. <br /> petroleum product or sheen was observed on the ground 2 tandusampie #67560 frface. Water rom <br /> N (sample #67561 from MW-1, sample #57562 from Me red by California Analytical <br /> MW-3) were collected in containers supplied and p p <br /> Laboratories/Enseco in West Sacramento. At the end of the field day,the water samples <br /> were submitted under C ain-Of-Cusu,dy to Es <br /> nco, a laboratory certified by the State of <br /> California, Department of I;eelt i Services for the requested analyses of extractable TP'H <br /> M, <br /> by EPA Method 8015M/3510 and purgeable TPH by EPA Method 8015114/5030; and <br /> } BTEX by TEPA Method 602. <br /> oil June 26, 1991, the monitoring wells were re-sampled for laboratory ately 1.5 feet analysis to verify <br /> of <br /> the February 21, 1991 results. During purging and sampling pp No rodact layer or <br /> product was observed floating on the ground water su �other well.ace in M -1.Water samples were <br /> sheen was observed while purging and sampling the <br /> Chain-Of- <br /> collected from MW-2 (#67713) and MW-3 (#67712)and were submitet analyticaldCmeth Os. <br /> Custody to California Analytical Laboratory for analysis using the same <br /> s for both sample rounds are included in <br /> The Purge Characterization and Sample Log <br /> _ A endix E. Chain-Of-Custody forms and the laboratory data sheets are provided in <br /> : y PP <br /> Appendix E. <br /> 3.5 MONITORING WELL ELEVATION SURVEY y" coordinates coordinates for the top of each 2-inch <br /> Elevations relative to mean sea level and the x,y' <br /> = well casings were surveyed by Tom O. Morrow, Inc. (California Licensed Land <br /> PVC <br /> 91. The coordinates were <br /> Surveyor #5161) on February 19, 19tied to City of Stockton <br /> datum on the southeast earner of the site. The map provided by Tom O. Morrow, Inc. is <br /> included in Appendix F. <br /> W The deptly to ground water was measured from a set location at the top of each casing on <br /> ril 9, 1991, and .lune 26, 1991. The depth to water was then <br /> February21, 1991, Ap round water surface h. <br /> ` subtracted from the corresponding. casing elevation to provide a g <br /> elevation at each well. The well casing <br /> elevations, depth to water measurements, and <br /> calculated ground water surface elevations relative to mean sea level are presented on ; <br /> Table 3. <br /> .... 6 <br /> F18.91.62 <br /> copyright 1991 Kleinfelder, Inc. <br />