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1 <br />' 5.2 Laboratory Analytical Results (soils) <br /> Select soil samples were analyzed for hydrocarbons by EPA modified 8015 as <br /> diesel and gasoline, oxygenates and lead scavengers by EPA method 8260 (See <br /> Scope of Work, Appendix VI) <br /> Laboratory analytical results showed detections of MTBE only in the soil samples <br /> collected Detections ranged from 6 1 parts per billion in GP-3 located on the <br /> subject property to as high as 44 ppb in GP-7 located offsite and to the northeast <br /> of the subject property All detections in soil were made in samples collected at <br /> or below the capillary fringe Samples were taken in the tank pit area located in <br /> 1 the area of GP-2 The sample at a depth of 12 feet bgs exhibited visual evidence <br /> of hydrocarbon contamination A request was made that this sample be analyzed <br /> for organic carbon and for petroleum hydrocarbons The laboratory sent this <br /> sample GP-12 @ 12 feet, to another laboratory for organic carbon analysis and all <br /> of the sample was used in the organic carbon analysis Therefore, hydrocarbons <br /> and oxygenates could not be analyzed for this sample <br /> Select samples were analyzed for organic carbon and for permeability and porosity <br /> A coarse sand analyzed for permeability and porosity exhibited moderate to high <br /> permeability A silty sand in the area of impact exhibited fairly high organic <br /> 1 carbon levels <br /> TABLE I <br /> SUMMARY OF SOIL ANALYTICAL RESULTS (GEOPROBE) <br /> TOTAL PETROLEUM HYDROCARBONS AS GASOLINE AND DIESEL <br /> 1 OXYGENATES AND VOCs <br /> BoringNumber Sample EPA Method EPA Method EPA Method 8260 MTBE, <br /> Depth 8015 Gasoline 8015 Diesel ETBE,TAME,DIPE,TBA, EPA Method 8020 BTEX(uglkg <br /> 1 (Feet) (mg(kg)ppm (mg(kg)PP m Ethanol,Methanol and 8260 VOCs(ug/kg)ppb <br /> (mg/kg) ppb <br /> GP-1 5 NA NA NA NA <br /> GP-1 8 ND ND ND ND <br /> 1 GP-1 15 NA NA NA NA <br /> GP-1 20 NA NA NA NA <br /> GP-2 10 NA NA NA NA <br /> GP-2 12 NA NA NA NA <br /> 1 <br /> Avalon Environmental Consultants 9627001-6 <br /> Joes Truck Plaza 15600 5 Harlan Road <br /> April 15,2001 6 Lathrop California <br />