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Mr. Rich Wilson November 2, 1998 Page 2 Soil boring(B-1) was advanced to a total depth of 51.5 feet below ground surface (bgs) for the collection of soil samples and a groundwater-grab sample. Soil boring(B-2) was drilled to a total depth of 21.5 feet bgs for soil sampling only. At five-foot intervals in both borings, soil samples were collected in 2-inch diameter brass sleeves using a modified California split-spoon sampler. Mr. Christopher M. Palmer(CEG 41262) logged each of the soil samples for hydrogeologic and lithologic characteristics according to the Unified Soil Classification System and screened the samples for volatile organic vapors using an organic vapor monitor, equipped with a photoionization detector(PID). The soil samples were sealed with Teflon° sheets and plastic end caps, labeled, logged onto chain-of-custody forms and placed in a chilled ice chest. Groundwater was encountered in B-1 at a depth of approximately 45 feet bgs. From B-1, a groundwater-grab sample was collected with a dedicated and disposable bailer and laboratory-supplied containers. The groundwater-grab sample was labeled, logged onto chain-of-custody forms and placed in a chilled ice chest. Upon completion of the soil and groundwater-grab sampling, both boreholes were sealed with neat cement. The soil and groundwater-grab samples were transported under chain-of-custody documentation to Chromalab, Inc., a state of California certified hazardous waste testing laboratory. Chromalab analyzed the soil sample collected at 15 feet bgs from B-1 and the groundwater-grab sample collected from B-1 for Total Petroleum Hydrocarbons (TPH)- as Jet A, TPH-as-Aviation Gasoline, TPH-as-Kerosene, benzene, toluene, ethylbenzene and xylenes (BTEX) by EPA Method 8020/8015M. Results of the Investigation In general, the soil beneath the site consists of silt and clay mixtures with only minor sand to a depth of approximately 45 feet bgs. Sandy soil was encountered at a depth of 45 feet bgs and extended to the total depth of the borehole B-1 (51.5 feet bgs). Saturated soil and groundwater was first encountered in B-I at a depth of approximately 45 feet bgs. Soil boring logs are attached. Based on the investigation results, subsurface soil and groundwater in the vicinity of the USTs has not been impacted by petroleum hydrocarbons. Concentrations of TPH-as Jet A, TPH-as-Aviation Gasoline, TPH-as-Kerosene, and BTEX were not detected above reporting limits in both the soil and groundwater-grab sample. The laboratory report and chain-of-custody documents are attached.