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1551 Industrial Road <br /> San Carlos,CA 94070-4111 <br /> Sequoia ` <br /> (650)232-9600 <br /> FAX(650)232-%170,v, <br /> Analytical A """""'sequolalabs��' <br /> Y <br /> f <br /> Gettler-Ryan/Geostmtegies(1) Project Unocal(i) Sampled 8/31/00 to 9/l/00 <br /> 6747 Sierra Court,Suite J Project Number Former Unocal SS#(0187) Received. 9/1100 <br /> Dublin,CA 94568 project Manager Deanna Harding Reported 9/18100 <br /> M <br /> '��`�. � 0} <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Anal -- ---w -Analyzed Level _ Result 1 s =Result „ Units _Recov Limits % Limit % Notes* <br /> LCS 0090034-BS1 <br /> Methyl tert-butyl ether 917/00 500 501 u 700-130 100 <br /> Surrogate 1,2-Dichloroethane-d4 " 500 547 " 760-114 109 <br /> LCS 0090034-BS2 <br /> Methyl tat-butyl ether 918/00 500 505 ug/l 700-130 101 <br /> Surrogate 1,2-Dichloroethaned4 " 500 452 " 760-114 904 <br /> 4 <br /> Matrix Spike ! 0090034-MSI L009012-05 r <br /> Methyl tert-butyl ether 917/00 Soo ND 492 119/1 600-140 98.4 <br /> Surrogate 1,2-Dichloroethaned4 FF 500- 529 - 760-114 106 <br /> Matrix Spike Dup 0090034-MSD1 L009012-05 - <br /> Methyl tert-butyl ether 9/7100 500 ND 483 ug/1 n 600-140 966 250 1.85 <br /> Surrogate -1,2-Dichloroethaned4- - "` - Soo— - '- 504 - "-- 760-114 — 101 - - <br /> Batch:--0090051 Date Prepared, 9/11/00 Extraction Method: EPA 5030B P <br /> Blank 0090051-BLK1 <br /> Ethanol _ 9/11/00 ND. , ug/i 1000 <br /> f =Tert-butyl alcohol <br /> Methyl tat-butyl ether ND " 2.00 <br /> 2.00 — <br /> Ethyl tert-butyl ether ND 2.00 <br /> Tert-amyl inethyl ether - " - f' — - - - - - ND - - --2.00 <br /> Surrogate 1,2 Dichloroethaned4 500 498 760-114 996 <br /> Blank 0090051-BLK2 <br /> Ethanol 9113100 ND 119/1 1000 <br /> Tort-butyl alcohol ." ND 100 <br /> Methyl tett butyl ether ND 2.00 <br /> Di-isopropyl ether ND " 2.00 <br /> Ethyl tent-butyl ether ND " 2.00 - <br /> Tert-amyl methyl ether ND 2.00 <br /> Surrogate 1,2-Dichloroethane-d4 " 500 501 760-114 100 <br /> LCS 0090051-BS1 <br /> Methyl tert-butyl ether 9/11/00 500 480 ug/l 700-130 960 <br /> Surrogate 1,2 Dichloroethane-d4 Soo 491 760-114 982 <br /> LCS 0090051-BS2 <br /> Methyl tett-butyl ether 9/13100 Soo 484 ug/l 700-130 968 <br /> Surrogate 1,2-Dichloroethane-d4 300 503 " 760-114 101 4 <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 17 of 19 <br />