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evidence of biological activity (or absence of hydrocarbons) each successne boring around <br /> the same well will be placed three feet further than the previous boring <br /> At the next sampling (May 1995), bonngs will be drilled near VW-3, VW-4 and VW-6 The <br /> drilling will continue each quarter in a similar fashion, adding new %%ells when appropnate <br /> Bonngs will be dnlled to appro)amate depths of 60 feet using a hollow-stem auger with <br /> continuous conng However, if no hydrocarbons are detected in samples below the impacted <br /> zone, based both upon histoncal interpretations of the hydrocarbon plume and current data, <br /> sampling will occur only at five-foot intervals This decision will be made at the discretion <br /> of the on-site geologist <br /> Selected samples will be analyzed for TPH as gasoline, BTE&,X, bacterial composition and <br /> numbers Dunng the initial sampling, selected samples will be analyzed for nitrates and <br /> nitntes, phosphate and pH Hoµever, since lead and EDB have not historically shown to <br /> have significantly impacted soil, they will be eliminated from the sampling program <br /> TABLE 5 <br /> SOIL SAMPLING PROGRAM <br /> Geweke Land Detelopment and Marketing <br /> 16 South Cherokee Lane, Lodi, California <br /> . Units Ttipe of Santplutg \naktical <br /> Constituents Sample Locations Method <br /> Sample I'rcquencti <br /> TPH as gasoline ppni drnen Quarterly lanes see tL\t 801�m <br /> tube <br /> BTE&X PPn' drnen Quarterly \arses see tent 5020 <br /> tube <br /> Nitrates, Nitrites ppm drnen Initially %arses see text EPA 300 <br /> tube <br /> Phosphates PPM drnen Inrtiallv %arses, see text EPA 300 <br /> P tube <br /> --- drnen Quarterly %aries, see teat 6arious <br /> bacterial composition tube <br /> --- drnen Quarterly \aries, see text %arious <br /> bacterial numbers tube <br /> unitsdrnen Quarterly varies, see text --- <br /> i <br /> PH tube <br /> Soil samples will be collected for analysis at all changes in lithology, at the top of the <br /> capillary fringe and near the groundwater surface After May 1995, the sampling plan will <br /> Geobj�l jku&l Sery lac 6 <br /> GEN'ER�j ,d Moo.ior.ne <br /> B.11 41 <br />