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- <br /> n . <br /> - <br /> �i+7 <br /> WHF Environmental Consultants, Inc. <br /> Sampling Protocol <br /> Page: 3 <br /> The samples will be refrigerated immediately for delivery to the laboratory and <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 /> Soil Sampling <br /> All soil sampling equipment will 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 l,lodified Split Spoon sampler <br /> with brass liners. Tile sampler will be driven by a 140 pound hammer <br /> repeatedly falling 30 inches. The blow counts necessary to drive the sampler <br /> will be recorded for each 6-inch interval to help evaluate the consistencies of the <br /> materials. <br /> The laboratory samples will not have head space and will be immediately sealed <br /> in their liners using aluminum foil lined plastic caps. The remaining sample <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 limits used for each analyte will be .005 <br /> mg/kg for BTX&E, and 2.5 mg/kg for gasoline. Analyses are to be conducted <br /> by GeoAnalytical Laboratories, Inc. <br /> Soil sampling in the excavation will be taken with brass tubes, driven into the <br /> sidewalls and the bottom.of the excavation. The number of samples will be <br /> determined by the size of the excavation. <br /> Ground Water Sampling <br /> A travel blank provided by the laboratory will accompany the sample vials roar <br /> the time they are picked up from the lab to the time they are delivered to the <br />