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CDSequoia 885 Jarvis Drive <br /> Morgan Hill CA 95037 <br /> Analytical {408 776-9308 <br /> FAX(4081) 782-6308 <br /> Blaine Tech Services(Chev) Project Chevron 9-1848(1257 Yosemite Wy,,Manteca) Sampled 11/23/99 <br /> 1680 Rogers Avenue Project Number 991123-A2 Received 11/24/99 <br /> San Jose CA 95112 Project Manager Scott Boor Reported 12/10/99 <br /> `Total Petroleum IfIydrocarbons as,Gasoline and RTEX-byrEPA,8015M18020M/Quality Control' W- <br /> Sequoia Analytical-Petaiuma <br /> Date <br /> Spike Sample QC Reporting L►mit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9120117 Date Prepared 12/7/99 Extraction Method EPA 5030 waters <br /> Blank 9120117-BLK2 <br /> Gasoline 12/7/99 ND ug// 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butvl ether ND 2 50 <br /> Surrogate a,a a-Trifluor91oluene 300 303 650-135 101 <br /> Surrogate 4-Bromofluorobenzene 300 279 650-135 93 0 <br /> LCS 9120117-BSZ <br /> Benzene 12/7/99 100 105 ug/1 650-135 105 <br /> Toluene 100 104 650-135 104 <br /> Ibenzene 100 97 2 650-135 97 2 <br /> nes/tot l l _ 300 308 65 0-135 _ 103 <br /> rogate a a,a-l'rflucrotoeuene- - "- T ------ 300 ��---� 31?- - ' --� _ 55 0-135 104 ----� --- — - <br /> Matrix Spike 9120117-MSl P912110-01 <br /> Gasoline- _ 12_/6/99 - 1000 63 3 1060 ug/l _ 65_0 135 99 7 _ <br /> Surrogate T-Bromof¢orobenzene 300 283 - "- 650-135 94 3- �- <br /> Matrix Spike Oup 9120117-MSD1 P912110-01 <br /> Gasoline _ - ne__- 1216/99 1000 63 3 1030 ug/I 650-135 967 200 305 <br /> 4- <br /> Surrogate Bromofluorobenze300 — 282 — 6-50-135 94 0 — <br /> oja Analytical-Morgan H111 *Refer to end ofreport for text of notes and definitions <br /> Page 3 of 4 <br />