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— w - FMLD PROCEDUMS FOA PREVIOUS WORK � ite afe �a Field work performed by Applied GeoSystems at the site was conducted in accordance with Applied Geosystems' Site Safetli Plan. This plan describes the safety requirements for drilling soil borings at the .sits. The Site Safety Plan is applicable to personnel and subcontractors of Applied GeoSystems. Applied GeoSystems'personnel and subcontractors I scheduled to perform work at the site were briefed on the contents of the Site Safety pian before work b agan. A copy of the Site Safety Plan was available for reference by appropriate parties during the work. The onsite Staff Geologist of Applied GeoSystems acted as the Site Safety Officer. ® nil >Iari Before drilling, Applied GeoSystems notified Underground Service Alert of our intent to drill so that approximate locations of underground utility lines and structures could be marked. We'hand-augered each boring to a depth of approximately 5 feet below grade to 0 attempt to locate underground structures. The borings were drilled with a CME SS drill rig a equipped with E-inch-diameter, hollow-stem augers. 15-Pil p Soil samples were collected at 5-foot intervals from the ground surface to the full depth of f. fhe;barings. The soil samples wert,'collected by advancing the boring to a point immediately . above.the sampling depth, and then uriving a i x California-modified, sPlit- sFooh samplercontaininS equipped with clean brass sleeves through the hollow center of the auger into the undisturbed native soil. The sampler and brass slc:,,ies were steam-cleaned or washed thoroughly with a laboratory-grade, non-phosphatic detergent and water before each use. The sampler was driven IS inches with a standard .140-pound hammer repeatedly dropped . E 30 inches. The number of blows to drive the sampler each successive 6 inches were counted and recorded to evaluate the relative consistency of the soil. During sampling, the geologist used a field photoionization detector{PID)to characterizeT. the re?ative levels of hydrocarbons. Field instruments such as the PID are useful for indicating relative Ievels of hydrocarbon vapors, but do not detect the concentration of hydrocarbons present with the same precision as laboratory analyses. One of the samples in brass sieeves not selected for laboratory analysis at each sampling interval was tested in �j the field using an PID, 771_;� ,esting was performed by placing the intake probe of the PID ® against the soil aft®s opening the brass container. € 3 � 4 ORnff4 ® Soil cuttings an d samples were logged using' gg the Unified Soil Classification System. Samples r. not selected for chemical analysis and the soil in the sampler'shoe were extruded in the field