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Tvrnin 11I MB Environmental Geology 8613 Walnut Ridge Way Sacramento, California 95828 (916) 681-1168 i /lN� 11 January 11,2005 FEB 1 0 2005 1, ENVIRONMENT HEALTH f PERMIT/SERVICES Mr.Kent Ramos Ramos Oil Company P.O. Box 401 West Sacramento, California 95691 Subject: Limited Phase Illnvestigation Results Beneto Oil Cardlock Fuel Facility 10855 South Harlan Road French Camp,California Dear Mr.Ramos, MB Environmental Geology (MBEG) was contracted by Ramos Oil Company (Ramos) to drill five Geoprobe soil borings at the Beneto Oil cardlock fuel facility located at 10855 South Harlan Road, French Camp, California. The borings were advanced in the vicinity of the diesel fuel dispensers, product piping, and 20,000-gallon diesel underground storage tank (UST). A site map illustrating site features and the soil sample locations is provided in Enclosure A. A drilling permit was required by the San Joaquin County Environmental Health Department; a copy of the drilling permit is included in Enclosure B. On December 20, 2004, under MBEG's supervision, Fisch Environmental drilled five soil borings (GP-1 through GP-5) at the subject property utilizing a hydraulic, direct-push (Geoprobe) drill rig. The borings were drilled to depths ranging from 8 to 32 feet beneath surface grade (bsg). Discrete soil samples were collected at 4 and 8 beneath surface grade (bsg) in the four borings (GP-1, GP-2, GP-4 and GP-5) adjacent to the dispenser islands and at 16 and 20 feet bsg from the boring (GP-3) adjacent to the UST. The soil samples were collected from each location using 1-inch diameter by 2-foot long acetate sample liner using hydraulic direct-push technology. Immediately following collection, the sample tube was sealed on each end with a TeflonT' membrane and a plastic cap. The sample was stored on ice pending transportation to the laboratory. Each of the soil samples was screened with a photoionization detector (PID). The PID readings were zero for each sample screened. The lithology encountered in the soil borings consists primarily of At and clay that contains thin, discontinuous beds of fine sand/silty sand. Copies of the soil boring logs are included in Enclosure C. Groundwater samples were collected from borings GP-1 through GP-3 using a Hydropunch sampling device. The soil and groundwater samples were submitted to Kiff Analytical laboratory in Davis, California for analysis of total petroleum hydrocarbons(TPH)as diesel by EPA Method 8015 Modified. Copies of the laboratory analytical report with chain-of-custody documentation for the soil and groundwater samples collected are included in Enclosures D and E, respectively. Laboratory analytical results reported low levels of TPH as diesel in each of the soil and groundwater samples for analysis. Concentrations of TPH as diesel were reported in soil at concentrations ranging from 3 to 11 milligrams per kilogram (mg/kg) and concentrations in groundwater at concentrations ranging from 89 to 240 micrograms per liter. Helping Businesses Solve Environmental Problems