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1551 lndusirial Road <br /> Sequoia San Carlos 0 <br /> (550)23 23 2-960-9600 <br /> FAX o) 12Analytical www.sequoiaiabs.com <br /> Gettler-Ryan/Geostraiegies(I} Project: Tosco(1) <br /> 6747 Sierra Court, Suite J Project Number: UNOCAL SS411195,LATHROP,CA Reported: <br /> Dublin CA.94568 Project Manager: Deanna Harding 08/28/01 07:22 <br /> Total Purgeable Hydrocarbon (C6-C]2) by EPA 8015AI and BTEXIAME by EPA 8021B - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Leel Result %REC Limits RPD Limit Notes <br /> Batch 1080100-EPA 5030B(PIT) <br /> Blank(1080100-BLKI) Prepared&Analyzed:08/23/01 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugll <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Methyl Cert-butyl ether ND 5.0 <br /> Surrogate:a,a,a-Triuorotoluene 9.86 10.0 98.6 70-130 <br /> LCS(1080100-BSI) Prepared&Analyzed:08/23/01 <br /> Benzene 9.71 0.50 ug/I 10.0 97.1 70-130 <br /> Toluene 9.68 0.50 10.0 96.8 70-130 <br /> Ethylbenzene 9.90 0.50 10.0 99.0 70-130 <br /> Xylenes(total) 29.6 0.50 30.0 98.7 70-130 <br /> Surrogate:a,a,a-Triiluorololuene 9.45 10.0 94.5 70-130 <br /> LCS(1080100-BS2) Prepared&Analyzed:08/23/01 <br /> Purgeable Hydrocarbons as Gasoline 230 50 ug/I 250 92,0 70-130 <br /> Surrogate:a,a,a-Tris luorotoluene 10.4 " 10,0 104 70-130 <br /> Matrix Spike(1080100-1%ISI) Source: L108078-11 Prepared&Analyzed:08/23/01 <br /> Purgeable Hydrocarbons as Gasoline 264 50 ug/l 250 106 60-140 <br /> Surrogate:a,a,a-Trifluororoluene 11.7 1110.0 117 70-130 <br /> Matrix Spike Dup(1080100-MSD1) Source: L108078-11 Prepared&Analyzed:08/23/01 <br /> Purgeable Hydrocarbons as Gasoline 266 50 ug/l 250 106. 60-140 0.755 25 <br /> Surrogate:a,a,a-Tri,Jluorotoluene 11.1 10.0 112 70-130 <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the thorn of".j <br /> custody document, This analytical report must be reproduced in its entirety. <br /> Page 12 of 22 <br />