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819 Striker Avenue Suite 8 <br /> Sequoia Sauarnento CA 95834 <br /> (9 16)921-9&00 <br /> (916)921 Analytical FAX equoalabs com <br /> 00 <br /> Gettler-Ryan-Rancho Cordova Project Former Unocal 0187,Stockton,CA S210535 <br /> 3140 Gold Camp Dr,Ste 170 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Geoffrey D Rtsse 11/12/02 16 29 <br /> Total Purgeable Hydrocarbon,BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result lamit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2100387-EPA 5030B(PIT) <br /> Laboratory Control Sample(2100387-BS5) Prepared&Analyzed 10/31/02 <br /> Benzene 101 0 50 ug/l 100 101 70-130 <br /> Toluene 103 050 100 103 70-130 <br /> Ethylbenzene 102 050 100 102 70-130 <br /> Xylenes(total) 306 050 300 102 70-130 <br /> Methyl tent-butyl ether 10 5 2 5 100 105 70-130 <br /> Surrogate a a a-Trifluorotoluene 917 100 93 60-140 <br /> Laboratory Control Sample Dup(2100387-BSD1) Prepared 10/25/02 Analyzed 10126102_ ^ <br /> Benzene 10 4 050 ug/l 100 104 70-130 7 25 <br /> Toluene 102 0 50 100 102 70-130 6 25 <br /> Ethylbenzene 9 64 050 100 96 70-130 4 25 <br /> Oyes(total) 309 050 300 103 70-130 5 25 <br /> J <br /> tert-butyl ether 114 2 5 100 114 70-130 4 25 <br /> Surrogate a a a-Trifluorotoluene 950 100 95 60-140 <br /> Batch 2110108-EPA 5030B PIT <br /> Blank(2110108-BLK1) Prepared&Analyzed 11/01/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 10 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-Trifluorotoluene 960 100 96 60-140 <br /> Blank(2110108-BLK2) Prepared&Analyzed 11/04/02 <br /> Purgeable Hydrocarbons ND 50 ug(l <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-Tri luorotoluene 901 100 90 60-140 <br /> uota Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Thu analytical report must be reproduced in its entirety <br /> Page 8 of 11 <br />