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WVE_ 01- NOV 2 ? 1989 ENVIRONMENTAL HEAL Th PE,' MIT/SERV,'CES ATTACHMENT #1 SOIL BORING Soil Boring Procedures Soil borings will be drilled with a continuous-flight hollow- stem auger. Samples will be collected with a California modified split-spoon sampler fitted w_,th clean brass sleeves . where possible, samples will be taken in conjunction with a Standard Penetration Test and blow counts will be recorded on the geological logs . All equipment will be steam cleaned before each boring to prevent cross-contamination. Samples will be collected at 5-foot intervals to the depth of the saturated zone, or 5 feet into the first massive clay or to 10 feet below evidence of contamination. The samples will be collected undisturbed in a brass liner sleeve and both ends will be sealed with aluminum foil, capped and wrapped with plastic tape. The samples will be labeled using a unique identifier and placed in a cooler chilled to 4 degrees Celsius with blue ice for shipment to the laboratory. All shipments will contain proper Chain-of Custody documents . The soil borings will be logged according to the Unified Soil Classification System by a qualified geologist under the supervision of a geologist registered in the State of California. Geological logs will be prepared for each boring. If groundwater is encountered in a soil boring, the fact will be noted on the boring logs and a sample will be collected, if possible. The sample will be collected through the hollow stem of the auger using standard bailer methods. The water sample will be transferred to standard 40 ml VOA vials fitted with Teflon septa and placed in a cooler chilled with blue ice for transportation to the analytical laboratory. After the boring has reached planned depth and sampling has been completed, the boring will be abandoned. Abandonment will consist of back-falling the boring with a bentonite slurry and sealing at the surface with a cement plug.