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' 23 March 2001 <br /> AGE-NC Project No 97-0343 <br />' Page 4 of 7 <br />' • TPH-g and TPH-d in accordance with EPA Methods 5030/8015 Modified and 3550/8015 <br /> Modified, respectively, <br />' • BTEX in accordance with EPA Method 602/8020, and <br /> • MTBE, DIPS, ETBE, TAME and TBA in accordance with EPA Method 8260 Modified <br /> 28 SURVEYING <br /> The casing elevations of monitoring wells MW4 through MW7 were surveyed relative to City of <br /> Stockton Bench Mark#346 On 07 March 2001, a California state-licensed survey engineer from <br />' Baumbach & Piazza, Inc surveyed the elevation of a reference point on the top of ground water <br /> monitoring wells MW4 through MW7 to the nearest 0 01-foot relative to City of Stockton Bench <br /> Marks and Description at 25 57 feet above mean sea level (msl) The results of the monitoring well <br />' survey are contained in Table 1 The surveying report (Baumbach & Piazza) is presented in <br /> Appendix D <br /> 3.0 FINDINGS <br /> Ground water elevation, flow direction, and gradient were determined from field data collected on <br /> 25 January 2001, the contaminant impact to soil and ground water was assessed from the laboratory <br /> analytical data <br /> 31 STRATIGRAPHY <br /> Generally, light to reddish brown, dry to damp, poorly graded sand with silt was encountered from <br /> I 15 feet bsg to 30 feet bsg Reddish brown, moist, silty sand was encountered from 30 feet bsg to 45 <br /> feet bsg Light brown, saturated, silty clay was encountered from 45 to 60 feet bsg <br /> Lines of cross section are illustrated on Figure 2 and stratigraphic cross sections are depicted on <br /> Figures 4 and 5 <br /> Organic vapor was not detected in any of the soil samples collected from monitoring well pilot <br /> borings MW4 through MW7 PID data is included on the boring logs (Appendix A) <br /> • <br /> Advanced GcoEnvironmentai,Inc <br />