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Superior Precision Ana6 ca/. Inc. <br /> 825 Arnold Drive Suite 1 14 ■ Martinez California 94553 • (510) 229-1512 /fax (510) 229-1526 <br /> WESTERN GEO ENGINEERS Project R603 <br /> Attn: GEORGE CONVERSE Reported 10/07/93 <br /> TOTAL PETROLEUM HYDROCARBONS <br /> Lab ## Sample Identification Sampled Analyzed Matrix <br /> 90150- 1 MWl 09/29/93 10/07/93 Water <br /> 90150- 2 MW2 09/29/93 10/07/93 Water <br /> 90150- 3 MW3 09/29/93 10/07/93 Water <br /> 90150- 4 MW4 09/29/93 10/07/93 Water <br /> 90150- 5 MW5 09/29/93 10/07/93 Water <br /> 90150- 6 MW6 09/29/93 10/07/93 Water <br /> 90150- 7 MW7 09/29/93 10/07/93 Water <br /> 90150- 8 MW8 09/29/93 10/07/93 Water <br /> 90150- 9 MW9 09/29/93 10/07/93 Water <br /> 90150-10 MW10 09/29/93 10/07/93 Water <br /> RESULTS OF ANALYSIS <br /> Laboratory Number- 90150- 1 90150- 2 90150- 3 90150- 4 90150- 5 <br /> lesoline 440 12000 1000 ND<50 ND<50 <br /> Benzene 0 6 920 34 ND<O 3 ND<O 3 <br /> Toluene : 1 0 1900 96 0 . 5 ND<O 3 <br /> Ethyl Benzene 1 9 120 6 . 7 ND<O 3 ND<0 . 3 <br /> Total Xylenes - 55 2200 190 0 9 ND<O 9 <br /> Concentration ug/L ug/L ug/L ug/L ug/L <br /> Laboratory Number 90150- 6 90150- 7 90150- 8 90150- 9 90150-10 <br /> Gasoline ND<50 ND<50 7700 ND<50 10000 <br /> Benzene ND<O 3 ND<O 3 1100 ND<O 3 24 <br /> Toluene ND<O 3 ND<O 3 550 ND<O 3 60 <br /> Ethyl Benzene ND<O 3 ND<O 3 110 ND<O 3 80 <br /> Total Xylenes ND<O 9 ND<O 9 1500 ND<O 9 3000 <br /> Concentration ug/L ug/L ug/L ug/L ug/L <br /> Page 1 of 3 <br /> Certified Laboratories <br />