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Superior P, ecision Analytical, Inc. <br /> 1555 Burke, Unit I • San Francisco, California 94124 • (415) 647-2081 / fax (415) 821 7123 <br /> TOUCHSTONE DEVELOPMENTS Project 8632-1 <br /> Attn: JEFF MONROE Reported 05/28/94 <br /> TOTAL PETROLEUM HYDROCARBONS <br /> Lab Sample Identification Sampled Analyzed Matrix <br /> 15540-11 WO-E 05/20/94 05/26/94 Soil <br /> 15540-12 WO-W 05/20/94 05/25/94 Soil <br /> 15540-13 SUMP 05/20/94 05/25/94 Soil <br /> 15540-14 HOIST 05/20/94 05/21/94 Soil <br /> 15540-15 P-1 05/20/94 05/26/94 Soil <br /> 15540-16 P-2 05/20/94 05/27/94 Soil <br /> 15540-17 P-3 05/20/94 05/27/94 Soil <br /> 15540-18 P-4 05/20/94 05/27/94 Soil <br /> 15540-19 SP-1(A&B) 05/20/94 05/27/94 Soil <br /> 15540-20 SP-2 (A&B) 05/20/94 05/27/94 Soil <br /> RESULTS OF ANALYSIS <br /> Laboratory Number: 15540-11 15540-12 15540-13 15540-14 15540-15 <br /> Gasoline_Range: 20 140 220 NA 1 <br /> Benzene: 0. 10 0.73 1. 3 NA 0. 069 <br /> Toluene: 0. 10 0. 66 2.5 NA 0.013 <br /> Ethyl Benzene: 0.35 3 . 2 2.9 NA 0. 010 <br /> Total Xylenes: 0.59 13 4 . 6 NA 0. 025 <br /> Diesel: *180 *1700 *2100 NA NA <br /> oil and Grease: 510 5200 4700 ND<50 NA <br /> Concentration: mg/kg mg/kg mg/kg mg/kg mg/kg <br /> Laboratory Number: 15540-16 15540-17 15540-18 15540-19 15540-20 <br /> Gasoline_Range: 40 620 760 100 10 <br /> Benzene: 0. 66 0.74 1. 3 0. 18 0 . 04 <br /> Toluene: 0.41 7 . 5 8.4 1. 1 0 . 06 <br /> Ethyl Benzene: 1. 5 16 14 1.7 0. 06 <br /> Total Xylenes: 0. 67 66 75 10 0 . 25 <br /> Diesel: NA NA NA NA NA <br /> Oil and Grease: NA NA NA NA NA <br /> Concentration: mg/kg mg/kg mg/kg mg/kg mg/kg <br /> Page 2 of 4 <br /> Certified Laboratories <br />