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Sequoia 819 Striker Avenue Suite 8 <br /> a_� <br /> Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical FAX equ alabsc00 <br /> www sequofalabs corn <br /> 4ro <br /> IT Corporation-Sacramento Project Parkinson's ARCO,Stockton <br /> 1433 N Market Blvd,Ste 1 Project Number 880-040 1AI01060000 Reported <br /> Sacramento CA,95834 Project Manager Kathleen Waldo 05/02/01 11 43 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1040299-EPA 5030B(PIT) <br /> Blank(1040299-BLK1) Prepared&Analyzed 04/25/01 <br /> Purgeable Hydrocarbons ND 500 ug/l <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 It <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Surrogate aa a-Tnfluorotoluene 985 100 983 60-140 <br /> LCS(1040299-BSI) Prepared&Analyzed 04/25/01 <br /> Benzene 962 0 500 ug/l 100 962 70-130 <br /> Toluene 972 0 500 10 0 972 70-130 <br /> Ethylbenzene 9 85 0 500 100 985 70-130 <br /> es(total) <br /> 302 0 500 300 101 70-130 <br /> urrogate a,a a-Trifluorotoluene 9 56 100 9.56 60-140 <br /> Matrix Spike(1040299-MSI) Source S104322-02 Prepared&Analyzed 04/25/01 <br /> Benzene 9 71 0 500 ug/l 100 ND 97 1 60-140 <br /> Toluene 9 72 0 500 100 ND 972 60-140 <br /> Ethylbenzene 9 79 0 500 10 0 ND 979 60-140 <br /> Xylenes(total) 30 1 0 500 300 ND 100 60-140 <br /> Surrogate a a a-Tris luorotoluene 9 71 100 971 60-140 <br /> Matrix Spike Dup(1040299-MSDI) Source S104322-02 Prepared&Analyzed 04/25/01 <br /> Benzene 9 68 0 500 ug/l 100 ND 968 60-140 0 309 25 <br /> Toluene 968 0 500 100 ND 968 60-140 0 412 25 <br /> Ethylbenzene 983 0 500 100 ND 983 60-140 0 408 25 <br /> Xylenes(total) 30 1 0 500 300 ND I00 60-140 0 25 <br /> Surrogate a,a,a-Triuorotoluene 100 100 100 60-140 <br /> uoia Analytical-Sacramento The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 6 of 10 <br />