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7S <br /> Wiff F_nvironmerual Cansullants, Inc. <br /> Sampling ProlOcOl <br /> Page: 3 <br /> The samples will be refrigerated immediately for delivery to the laboratory and �(J' <br /> will under no circumstances be opened by anyone other than laboratory <br /> personnel. Chain of Custody records will be maintained at all times (Figure 6). <br /> Sail Sampling <br /> All soil sampling equipment wilt be thoroughly steam-cleaned before and <br /> between sampling to prevent cross contamination. Relatively undisturbed soil <br /> samples will be taken at intervals of not more than 5 Feet in order to evaluate <br /> the subsurface materials, however, this sampling interval may be waived in <br /> saturated sands in which sample recovery is not possible. <br /> The soil samples will be taken using a California Modified Split Spoon sampler <br /> with brass liners. The sampler will be driven by a 140 pound <br /> repeatedly falling ah • chrvltevaluate nts necessary to drive the sl <br /> er <br /> will be recorded or inches. <br /> bininterval help the consistencies the <br /> materials. <br /> The laboratory samples will not have head aspacc c and s.The rebe maining sample <br /> immediately seled <br /> in their liners using aluminum foil lined p 1? <br /> will be removed from its liner to be used as an aide to the on-site geologist in <br /> logging the material at that depth. <br /> Soil samples collected for analysis will be analyzed using EPA method 8015 <br /> modified for total petroleum hydrocarbons, EPA method 8020 for BTX <br /> compounds. The minimum detection limitsusgasoline. for each Analyses are te be will be .0c ed <br /> mglkg for BTX&E, and 2.5 mglkg <br /> by GeoAnalytical Laboratories, Inc. <br /> brass <br /> s, driven into the <br /> Soil sampling in o[om of he excavation. Thevation will be taken number enumber ofsamples will be <br /> sidewalls and the bottom <br /> b <br /> determined by the size of the excavation. <br /> und_WuterSampling <br /> A travel blank provided by the laboratory will accompany the sample vials from <br /> the time they are picked up from the lab to tile time they are delivered to the <br />