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Eckert Cold Storage Company <br /> _ 757 Moffat Blvd., Manteca, California September 26, 1994 <br /> Underground Tank Investigation Page: 4 <br /> sampling methods, date and time of sampling, the number of well volumes removed <br /> before sampling, preservatives added (if any), and any filtration performed on samples. <br /> -The;samples will be.refrige4'atedximmediatelvfor,delivery-tc tlie'lahoratory;asid will <br /> under no circumstances be opened by anyone"other than laboratory personnel. tCliain <br /> of Custody-rrecords will be maintained at all times Figure 6). <br /> 3.4 Soil Sampling <br /> All soil. sampling equipment will be thoroughly steam-cleaned before and between <br /> L. sampling to prevent cross contaminatio::. Relatively undisturbed soil samples will be <br /> taken at intervals oilnot more than 5 feet in order to evaluate the subsurface materials, <br /> however, this sampling interval may be waived in saturated sands in w1iich sample <br /> recovery is not possible. <br /> The soil samples will be taken using a California Modified Split Spoon sampler with <br /> brass liners. The sampler will be driven continuously by a wire line hammer. <br /> t''Soil-samples-coIlected -for- EPA method-8G2Q_for <br /> 'rBT:�&&E=and-TPH--Gasoline and-rnetho i L-F-T 3 5.5018015-for=TP_H_ �:Gasoliiie <br /> w, C7_A aWses-are-to-be-conducted-by CeoAnalytical Labc;ratories,-Inc. <br /> 3 S (Frounrhivater Sampling <br /> A travel blank provided by the laboratory vJij. accompany the sannple rials from the <br /> time they are picked up from the lab to the time they are delivered to the lab. This <br /> travel blank should be listed on the Chair: of Custody but will be analyzed only if all <br /> samples contain the same contaminants. <br /> All sampling equipment inciuding the pump, bailer, and cables, used by sampling <br /> personnel, will be disassembled, if appropriate, and steam-cleaned prior to <br /> commencement of sampling. Tlsese procedures will also be followed between each <br /> ;well, sampling point, and at the end of the sampling day. De-ionized or organic-free <br /> water(also provided by the laboratory) will then be introduced into the pump or bailer <br /> as a final stage of cleaning. This water w7ll :then be pumped or gently poured into <br /> sample vials to be used as.pump or bailer blanks. These blanks will be tested only if <br /> their corresponding samples are found to contain contaminants. <br /> Imin. <br /> ediateiy.pnor.to-sampling,-water levels and well depth-.measurements will be takeni <br /> in all_hells at the site. `Each well will be evacuated using a stainless steel bladder pump, <br /> which does not introduce air into the water column, or a Teflon: bailer. The pIL <br /> temperature, and electrical conduc6,At, o`the water will be monitored as the well is <br />