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APPENDIX II <br /> SOIL BORING PROCEDURES <br /> Soil borings will be made using a truck-mounted 8-inch, hollow-stem auger drill rig An <br /> • AEMC geologist will maintain a continuous log of the soils penetrated and note soil type, <br /> color, and obvious contanunation Soils will be classified in accordance with the Unified <br /> Soil Classification System (USCS) <br /> • <br /> Relatively undisturbed soil samples will be collected in each hollow stem auger boring at <br /> approximately 5- to 10-foot intervals using a California modified split spoon sampler. The <br /> sampler will be driven 18 inches ahead of the drill bit using a 140-pound hammer with a <br /> 30-inch drop The number of blows necessary to drive the sampler will be recorded on the <br /> boring logs as a qualitative measure of the soil's density and cohesion The split spoon <br /> . sampler will be fitted with 6-inch long, 2 5-inch diameter brass sleeves Upon retrieval of <br /> • <br /> the sampler from the borehole, soils will be screened for organic vapor emissions using a <br /> Microtip portable photo-roruzation detector (PID) The samples will be monitored by <br /> recording peak readings while separating the brass sleeves in the sampler Organic vapor <br /> emissions will be recorded in volumetric parts per million (ppm) <br /> i <br /> Subsequent to vapor monitoring, the exposed ends of the sleeves will be covered with <br /> j• Teflon sheeting, fitted with plastic end caps, sealed with electrical tape and labeled <br /> I <br /> Sample labels will include the following information (1) boring number, (2) sample <br /> number, (3) date, (4) collector initials, (5) owner, and (6) location Soil samples will be <br /> • stored in an ice chest cooled with blue ice Samples will be delivered under Chain-of- <br /> Custody to American Environmental Laboratory Corporation (AELC) for analysis <br /> Before advancing each boring, the downhole drilling equipment (auger sections) will be <br /> • steam cleaned to help prevent cross-contamination from the previous borings Sampling <br /> equipment will be cleaned between each use by washing in a Liqur-Nox solution followed <br /> hlh]d-O(ka 1) <br /> 0 AMERICAN <br />