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' <br /> APPENDIX C <br /> ' � <br />`~^ Page: 2 <br /> such as names of on-site personnel, sampling methods, date <br /> and time of sampling, the number of well volumes removed <br /> before sampling, and any preservatives added or filtration <br /> performed on samples. <br /> � The samples will be refrigerated and packaged <br /> w� <br /> immediately for delivery to the laboratory, and will under no <br /> circumstances be opened by anyone other than laboratory <br /> Lpersonnel. Chain of Custody �records will be maintained at <br /> all times. <br /> � <br /> � <br /> Samples will be analyzed by a laboratory specifically <br /> L certified by the California Department of Health Services to <br /> perform the analysis requested. Samples will not be tested <br /> after their sample life has been exceeded according to EPA <br /> Lguidelines, and will be properly disposed of after analysis. <br /> " <br /> " <br /> L SOIL PLING <br /> o <br /> T All soil sampling equiprnent will be thoroughly steam- <br /> cleaned before sampling and between sampling to prevent <br /> L cross-contamination. Relatively undisturbed soil samples <br /> � will be taken at intervals of not more than five feet in <br /> order to evaluate the subsurface materials; however, this <br /> �- <br /> � sampling interval may be waived in saturated sands or gravels <br /> � <br /> ~� in which sample recovery is not possible. <br /> � <br /> The soil samples will be collected using a California <br /> L Modified split-spoon sampler with- brass liners. The sampler <br /> will be driven by a 140 pound,, hammer repeatedly falling 30 <br /> inches (ASTM Standard 1586) . <br /> L The laboratory samples w ill not have head space and will <br /> be immediately sealed in the liners using aluminum foil <br /> L <br /> lined plastic caps that are ped in place. The remaining <br /> sample will be removed from '' s liner to be used for sieve <br /> analysis, if appropriate, and to aid the on-site geologist in <br /> logging the material. <br /> 1 <br /> | " <br /> � <br /> � <br /> | " <br /> � <br /> : <br /> / . . <br /> � <br /> , <br /> | <br /> � <br /> � <br /> * ' <br /> 1 <br /> � <br />'' ' <br />