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tw Y, i Lodi Ready Mix Soil Sampling Report i Project No.:01-93.1 November 12,1991 Page 2 Laboratory Analyses The soil samples were submitted to GeoAnalytical Laboratories WE757) of Modesto,CA for analysis. Ten discrete soil samples were collected (one from each pile) and analyzed for benzene, toluene, ethyl benzene, total xylene (BTEX), total petroleum hydrocarbons as gasoline (TPH GasoIine), and total extractable petroleum hydrocarbons (TEPH)• Four soil samples were collected from random locations and composited into one sample to be analyzed for 5 metals (Ca, Cr, Pb, Ni, Zn). Four soil samples were collected from random locations and are being held at the laboratory for possible Bioassay analysis. The detection limits for these analyses are as follows: BTEX is 5.0 Ag/kg (parts per billion-ppb), TPH Gasoline is 2.5 mg/kg (parts per million-ppm), TEPH are kerosene-5.0 ppm, diesel-5.0 ppm, and motor oil-50 ppm, the 5 metals are Ca-0.5 ppm,Cr-1.0 ppm,Pb-5.0 ppm,Ni-2.5 ppm,and Zn-2.5 ppm. Discussion of Analytical Data As the analytical data indicate, only two soil samples had contamination as hydrocarbons (soil pile #3 had 200 ppm of diesel and soil pile #8 had 50 ppm motor oil, just at detection limit) The metals found in the soil are not significant levels, and are believed to represent background levels. The source for the metals in the soil are most likely the metamorphic volcanic source rocks to the East in the Sierra Nevada Range. Aromatic Hydrocarbon and Total Petroleum Hydrocarbons as Gasoline Analyses Sample ID Benzene Toluene Ethyl Benzene Xylenes Gasoline / /k /k /k Soil l ND ND ND ND ND Soil ND ND ND ND ND Soil ND ND ND NDI ND Soil ND ND ND ND ND w- Soil ND ND ND ND ND Soil ND ND ND ND ND Soil ? ND ND ND ND ND Soil S ND ND ND ND ND I 9 ND ND ND ND ND _10..._.. ..... ND NDND ND ND ection 5.0 5.0 5.0 5.0 2.5 its