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Work Flan Evaluation of Soil and Ground Water December 4, 1989 <br /> Unr;cai Station No. 6981, Stockton, California AGS 38032-3W <br /> technique may be terminated if very loose sandy dry soil or loose saturated sands are <br /> encountered. These types of soil can cause the sampler to become stuck in the auger. The } <br /> continuous care will provide a continuous log of the soil encountered,which can be used <br /> to evaluate the vertical extent of soil contamination more precisely and to observe small <br /> In addition, a continuous log <br /> vertical changes in site soil conditions. can be used when <br /> bearing zones that are less than S feet thick.and <br /> designing monitoring well screens in water <br /> can allow a more precise evaluation of the vertical ;hange in relative permeability of soil <br /> assist in the selection of remediation alternatives, <br /> beneath the site, which can be used to <br /> j if necessary. <br /> k A sample from each interval where soil samples are collected for possible laboratory <br /> analyses will be analyzed with a PID. These devices are useful for evaluating relative <br /> concentrations of hydrocarbon vapors,but cannot be used to measure levels of hydrocarbons <br /> with the precision and accuracy of laboratory analysis. <br /> Soil samples selected for chemical analysis will be quickly sealed with aluminum fail,Plastic <br /> caps, and duck tape. The samples will then be labeled and placed in iced storage for <br /> iransnort to the analytical laboratory for testing. Chain of Custody Records will be initiated <br /> by the geologist in the field and will accompany the samples to the laboratory. Copies of <br /> T — - —- - --- - -Chain-of - -- -- - <br /> these records will be presented in our final report. An example-of a :Custa y - <br /> Record is included in the Appendix to this Work Flan. <br /> Ld GOOSOMInS <br />