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-- - , <br /> t - <br /> k <br /> and garage etc . are located. This is almost exactly where <br /> the Spring 1990 County maps .predicted, as was shown on the <br /> work plan. <br /> Cores were taken and analyzed to cui' rent Tri-Regional <br /> standards in all three wells . In the two down-gradient wells <br /> away from the tank site (MW # ' s 1 &' 3) , the samples were <br /> either just above or just below the water table top. In MW # <br /> 2, located near the former tank site, cores were taken at <br /> the surface and at 5 ' intervals until the water table was <br /> penetrated. No contamination at test detection limits was <br /> found. The samples were tested for BTEX and TPH(G) . <br /> ' All three monitor wells were bailed and;' sampled twice, about <br /> one month apart. The on-site water,. well . also was sampled <br /> and tested. No contamination at test detection limits was <br /> found. The samples were tested for BTEX' and TPH(G) . No <br /> hydrocarbon odor or taste was observed in any of the tests <br /> The wells were bailed a total of three times when including <br /> the bailing done for developing thelwells immediately after <br /> drilling. A total of 90 plus gallons of' water was bailed <br /> from each of the wells when the three bailings are summed. <br /> I <br /> CONCLUSIONS <br /> i <br /> The monitor wells are located in optimum positions for <br /> detecting hydrocarbons in either the ground water or in the <br /> vadose zone . ! <br /> No detectable hydrocarbon contamination was found in any of r <br /> the three series of tests noted above on Charts A, B and C, <br /> all of which were to Tri-Regional sitandards . <br /> With the ground water at its current shallow depth, any y <br /> earlier and deeper vadose zone contamination that might have <br /> occurred should have been reflected: in the ground water <br /> samples . ' <br /> Water from the on-site water well was sampled when the tank <br /> was removed and during the series If tests . No contamination I <br /> was ever found. <br /> i, <br /> i� <br /> 13 1 <br />