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Sequoia oia 1551 Industrial Road <br /> 14R San Carlos,CA 94070-4111 <br /> A (650) 232-9600 <br /> Analytical <br /> FAX(650) 232-9612 <br /> Blame Tech Services Project Chevron(3) Sampled 6/21/99 <br /> 1680 Rogers Avenue ProjectNumber Chevron 9-3232/990621 R-2 Received 6/23/99 <br /> San Jose,CA 95112 Pro ect Manager Chnstine Lillie Reported 7/7/99 09 51 <br /> �� E���:�� � n§--�'ty � �# . ro,'" y" .'h ��' a� � ? '�7 4 s t ""�> ➢"�',�E �s3�}� P s � `� ru � r .a� ^' a"i <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Lunits IN, Limit % Notes" <br /> Matrix Spike 9060143-MSI L906285-02 3 <br /> Methyl tert-butyl ether 6/25/99 500 564 917 ug/1 600-140 70.6 <br /> i <br /> Surrogate 1,2 Dichloroethane-d4 " 500 474 It <br /> 760-114 948 <br /> Matrix Spike Duo 9060143-MSD1 L906285-02 3 <br /> Methyl tert-butyl ether 6/25199 Soo 564 103 ug/1 600-140 93.2 250 27.6 <br /> Surrogate 1,2-Dichloroethane-d4 It 500 512 It 760-114 102 <br /> Batch 9060159 Date Prepared 6/28199 Extraction Method EPA 50308 lP/'I'1 <br /> Blank 9060159-BLKI <br /> Ethanol 6/28199 ND ug/l 1000 <br /> Tert-butyl alcohol " ND +' 200 <br /> Methyl tert-butyl ether ND 200 <br /> Di-isopropyl ether " ND +' 2.00 <br /> 1 tent-butyl ether ND " 200 <br /> amyl methyl ether ND " 200 <br /> Surrogate 1,2Dichloroethane-d4 500 559 760-114 112 <br /> Blank 9060159-BLK2 <br /> Ethanol 6/29/99 ND ug/1 1000 <br /> Tert-butyl alcohol „ ND It <br /> 200 <br /> Methyl tert-butyl ether TO ND it 200 <br /> Di-isopropyl ether It ND 200 <br /> Ethyl Cert-butyl ether It ND 200 <br /> Tert-amyl methyl ether ND 200 <br /> Surrogate 1,2-Dichloroethane-d4 If <br /> 500 542 " 760-114 108 <br /> LCS 9060159-BSI <br /> Methyl tent-butyl ether 6/28/99 500 466 119/1 700-130 932 <br /> Surrogate 42-Dichloroethane-d4 " Soo 534 760-114 107 <br /> LCS 9060159-BS2 <br /> Methyl tert-butyl ether 6/29/99 500 51 1 ug/1 700-130 102 <br /> Surrogate 1,2-Dichloroethane-d4 " 500 530 to 760-114 106 <br /> Matrix Sol ke 9060159-MS1 L906300-01 <br /> Methyl tert-butyl ether 6129/99 Soo ND 448 ug/1 600-140 89.6 <br /> Surrogate 1,2-Dichloroethane-d4 500 514 " 760-114 103 <br /> Matrix Spike Dup 9060159-MSDI L906300-01 <br /> Methyl tert-butyl ether 6/29/99 Soo ND 456 ug/l 600-140 91.2 25 0 177 _ <br /> ogate 1,2-Dichloroethane-d4 IF - - ` <br /> 500 52 6. 760-114 105 — <br /> Sequoia Analytical-San Carlos *Refer to end of reportfor text of notes and definitions <br /> Page 8 of 9 <br />