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a <br /> 11'1Ir E11vironmental Consrrlurnts, Inc. <br /> Sampling Protocols <br /> Page: 3 <br /> The samples will be refrigerated immediately for delivery to the laboratory and will <br /> under no circurnstances be opened by anyone other than laboratory personnel. <br /> Chc.in of Custody records will be maintained at all times. <br /> Soil Sampling <br /> All soil sampling equipment will be thoroughly steam-cleaned before and between <br /> sampling to prevent cross contamination. Relatively undisturbed soil samples will <br /> be taken at intervals of not more than five feet (5') in order to evaluate the <br /> subsurface materials; however, this sampling interval may be waived in saturated <br /> sands in which sample recovery is not possible. During the use of a rotary rig, <br /> samples will not be taken through the gravel zone but wilI resume at five foot (S') <br /> intervals when a hollow stem flight auger drilling rig can be used. <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 hammer repeatedly <br /> falling 30 inches (30"), The blow counts necessary to drive the sampler will be <br /> recorded for each six inch (b°) interval to help evaluate the consistencies of the <br /> materials. <br /> The laboratory samples will not have head space and will be immediately sealed in <br /> their liners using aluminum foil lined plastic caps that are taped in place. The re- <br /> maining sample will be removed from its liner to be used as an aide to the on-site <br /> geologist in logging the material at that depth. <br /> Soil samples collected for analysis will be analyzed using EPA method 8240, <br /> Purgeable Organics, in a solid matrix. <br /> Ground Water Sampling <br /> A laboratory provided travel blank will accompany the sample vials from the time <br /> they are picked tip from the!ab to the time they are delivered to the lab. This travel <br /> blank should be listed on the Chain of Custody but will be analyzed only if all <br /> samples contain the same contaminants. <br /> - -- -- -- -- ----- -All sampling equipment including the pump,-bailer>-and cables,-used by sampling <br /> W _ personnel, will be disassembled if appropriate and steam-cleaned prior to <br /> commencement of sampling. These procedures will also be followed between each <br />