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r _ - - �0- 01 A Lambert Barnum November 24, 1990 l ` Page 2 Sail samples were collected at a depth of 7 feetusing a hand auger and driven tube sampler. All soil samples collected for possible chemical analysis were capped with aluminum foil-lined lids, labeled and immediately placed in a chilled ice chest. Soil samples collected were analyzed in accordance with the FRP. A chain- All samples were labeled in such a manner as to maintain client confidentiality. of-custody form was initiated by the sampler and accompanied the samples to the analytical laboratory. This chain-of-custody form is presented in Appendix 1. The soil samples collected were delivered to Superior Laboratory in Martinez, California a State approved laboratory (Certification Number 319), for the type of analyses performed. All samples were analyzed in accordance with EPA SW-846 Methods 5030 and 8020 for benzene, toluene,ethyl benzene and xylenes (BTXE),by Standard Method 5520)~ EPA SW-846 Method 8015 for total petroleum for oil and grease, and Modified hydrocarbons (TPH). 1Vlonitoring.Wells tom; As proposed in the FRP each of the three monitoring wells installed at the Stan Mari Ford dealership will be sampled and the samples analyzed for purgeable halocarbon by EPA Method 601 on a quarterly basis for the period of one year. Each of these wells was sampled on November 25, 1990. Prior to sampling, each well was of purged of three to five well volumes of water until spe efiarateddedic ed PVC baillersconuctivity and pH vauesfor the water had stabilized. Each well was sampled using p each well. Two 40 ml VOA vials were collected from each well and placed in a chilled ice chest until delivery to a certified analytical laboratory. FINDINGS AND CONCLUSIONS Augg Borines Results of analytical laboratory tests are presented in Table 1 and in Appendix 1. A total of seven soil samples were analyzed for BTXE and oil and grease. A single composite ramie, comprised of six separate soil samples derived from the stockpiled soil, was - ---- -- -- --- analyied%or TPH as-diesel. ----- ----.--- The sails samples collected manually by hand auger and driver-tube.sampler were all collected from a depth of 7 feet below the surface. This was the maximum depth reachable using the hand auger. The average ail and grease concentration or 397 mg/1cg the angering for the five auger hole samples is suspected of being artificially high due to