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Sequoia 885 Jarvis Drive <br /> Morgan Hill CA 95037 <br /> Analytical (408) 776-9600 <br /> Y FAX(408) 782-6308 <br /> Blaine Tee h Services(Chev) Project Chevron 9-8632 (575 Grant Line Rd Tracy) Sampled 8/30/99 <br /> 1680 Rogers Avenue Project Number 990830-P2 Received 8/31/99 <br /> San Jose, CA 95112 Project Manager Christine Lillie Reported 9/28/99 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Anaiyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9090254 Date Prepared 9/10/99 Extraction Method EPA 5030B PIT <br /> Blank 9090254-BLK1 <br /> Purgeable Hydrocarbons 9110/99 ND ug/l 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-butyl ether ND " 2 50 <br /> Surrogate a a a-Trifluorotoluene 100 108 700-130 108 <br /> LCS 9090254-BSI <br /> Purgeable Hydrocarbons 9/10/99 250 248 ug/l 700-130 992 _ <br /> Surrogate a a,a-Trifluorotoluene 10 0 106 700-130 106 <br /> AllishirtxRnike 9090254-MS1 9090045-02 <br /> _ eable Hydrocarbons 9/10/99 250 ND 261 ug/I 600-140 _104 <br /> Surrogate a a a-Trafluorotoluene 10 0 102 700-130 102 <br /> Matrix Spike Dup 9090254-MSDI 9090045-02 <br /> Purgeable Hydrocarbons _ 9/10/99 250 ND 243 ug/l 600-140 97 2 25 0 6 76 <br /> Surrogate a a a-Trifluorotoluene 10 0 _ 957 11700-130 95 7 <br /> Batch 9090255 Date Prepared 9110/99 Extraction Method EPA 5030E IP/TI <br /> Blank 9090255-BLK I <br /> Purgeable Hydrocarbons 9/10/99 ND ug/l 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-butyl ether ND 250 _ <br /> Surrogate a a a-Trifluorotohiene 100 113 700-130 113 �� <br /> LCS 909025-PN-BSI <br /> Purgeable Hydrocarbons 9/10/99 250 251 ug/l 700-130 100 <br /> Surrogate a a a-Trifluorotoluene 100 145 700-130 1.15 2 <br /> Matrix Spike 9090255-MSI 9090038-03 <br /> Purgeable Hydrocarbons9/10/99 __ 250 ND 270_ ug/l 600-140 108 <br /> Surrogate a a a-Triuorotoluene "� 100 144 - 70 0-130 144 ���---j <br /> Matrix Spike Dup 9090255-MSD1 9090038-03 <br /> able Hydrocarbons 9/10/99 250 ND 280 ug/l 600-140 112 250 3 64 <br /> Sequoia Analytical-Morgan Hill *Refer to end of report foi text of notes and definitions <br /> Page 6 of 10 <br />