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x R� <br /> 3.5 Monitoring Well Surveying <br /> IOn June 16, 1994, the casing elevation of MW-5 was surveyed relative to monitoring well <br /> MW-4. The relative elevation of MW-5 was then calculated. Casing elevations for all wells <br /> are included in Table 1. <br /> 3.6 Laboratory Analysis of Soil and Water Samples <br /> Selected soil samples were analyzed for total petroleum hydrocarbons(TPH as gasoline) and <br /> volatile aromatics(BTE&X)in accordance with EPA methods 8015m and 8020,respectively <br /> The water sample was analyzed for TPH as gasoline and BTE&X in accordance with EPA <br /> methods 8015m and 602, respectively <br />' TABLE 1 <br /> RELATIVE GROUNDWATER ELEVATIONS <br />' Depth to Groundwater Groundwater Elevation <br /> Casing <br /> Well No. Elevation 1/25/94 6/2/94 1/25/94 6/2/94 <br /> IMW-1 9.50 3489 3402 -2539 -2452 <br /> MW-2 9.84 3520 3433 -2536 -2449 <br /> MW-3 974 3512 3427 -2538 -2453 <br /> IMW-4 9.38 3482 3394 -2544 -2456 <br /> MW-5 9.60 --- 3467 --- -2507 <br /> ALI meaanrements in leet iaatrvr to mean sea level <br /> 4.0 FINDINGS <br /> 4.1 Stratigraphy <br /> The stratigraphy appears to be relatively uniform across this site Alternating silty clays and <br /> sandy silts are present from the surface to a depth of 25 feet A well-sorted sand was <br /> encountered between 25 and 28 feet. Blue-green to olive gray silty clay is present from <br /> approximately 28 feet to the bottom of the boring (49 feet, see Appendix B) <br /> 4.2 Relative Groundwater Elevation and Gradient <br /> The relative elevation of the groundwater in each well was calculated by subtracting the <br /> water depth from the surveyed casing elevation (Table 1). The data indicate that <br /> groundwater has risen an average of 0 87 feet at the site since the January monitoring event <br /> o..k.w ear 5.mnk I— 6 <br /> ck.a MW�..+�m sn�.,a...�vn+ <br /> I <br />