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Superior Precision Analytical. inc- <br /> BEC2 -11992 <br /> 825 Arnold Dri Su tc 1 '4 ■ Martinez California 94553 • J5 10) 229 1 51 2 / ' 51 01 229 1 526 <br /> Pro3ect 31-0308 <br /> Alton Geoscience Reported 12/23/92 <br /> Attn TODD PEARSON <br /> TOTAL PETROLEUM HYDROCARBONS <br /> Sampled Analyzed Matrix <br /> Lab # Sample Identification Sam P <br /> TB-LB <br /> 12710/92 12 23/92 Water <br /> 87409- 1 <br /> 87409- 2 TB-LB <br /> RINS 12/10/92 12/23/92 Water <br /> 87409- 3 MW-7 12/10/92 12/23/92 Water <br /> 87409- 4 MW-3 12/10/92 12/23/92 Water <br /> 5 MW-4 12/10/92 12/23/92 Water <br /> 87409- <br /> 87409- 5 MW-6 12/10/92 12/23/92 Water <br /> 87409- 7 MW-5 12/10/92 12/23/92 Water <br /> 87409- 8 MW-1 12/10/92 12/23/92 Water <br /> 12/10/92 12/23/92 Water <br /> 87409- 9 MW-2 <br /> RESULTS OF ANALYSIS <br /> Laboratory Number. 87409- 1 87409- 2 8740- 3 8740 3 4 87409- 5 <br /> -v 5 P,�N <br /> ND<50 ND<50 ND<50 ND<50 ND<50 ND<0 <br /> Gasoline ND<0 . 5 <br /> Benzene : ND<0 5 ND<0 . 5 . 5 �<0 . 5 ND<0 . 5 <br /> Toluene : ND<0 . 5 ND<0 5 ND<0 . 5 <br /> Ethyl Benzene ND<0 5 ND<0 5 ND<0 . 5 ND<0 5 NDND<0 . 5 <br /> Xylenes : <br /> ND<0 5 ND<0 5 ND<0 . 5 0 5 Concentration. ug/L ug/L ug/L ug/L ug/L <br /> Laboratory Number 87409- <br /> 6 87409- 7 87409- 8 87409 9 <br /> 700 1200 4900 9900 <br /> Gasoline : 1300 1600 <br /> 16 <br /> 3 . 2 16 26 <br /> Benzene ND<0 . 5 8 <br /> Toluene - 224 1100 <br /> 0 6 <br /> Ethyl Benzene . 64 <br /> 200 130 930 <br /> Xylenes 0 6 <br /> u <br /> Concentration- 9/L ug/L ug/L ug/L <br /> Page 1 of 2 <br /> Certified Laboratories <br />