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Sequoia Walnut `94� <br /> (92.5)988-9600 <br /> FAX Analytical w `gam'X73 <br /> www.sequolalabs.00rn <br /> Geftkx Ryan,Inc -Dublin Project Chevron <br /> 6747 S=Ta.Court Suite J Project Number Chevron#9-2033 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 01-Sep-00 13 31 <br /> Dissolved Metals by EPA 200 Series Methods - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result MREC Limits RPD Lmt Notes <br /> Batch OH21012-200.7 <br /> Blank(OH21012-BLK1) Prepared 21-Aug-00 Analyzed 31-Aug-00 <br /> Cadmium ND 0 010 Me <br /> Chromnun ND 0 010 " <br /> Lead ND 0 020 " <br /> Nickel ND 0 050 " <br /> Zoic ND 0 020 " <br /> LCS(OH210I2-BSI) Prepared.21-Aug-0O Analyzed 31 Aug-00 <br /> Cadmium 100 0 010 mg/I 100 100 80-120 <br /> cbrammm 0 990 0 010 100 990 80-120 <br /> lead 105 0 020 too 105 80-120 <br /> Nickel 0 970 0 050 100 970 80-120 <br /> zmc 110 0 020 100 110 80.120 <br /> LCS Dup(OI321012-BSD1) Prepared.21 Aug-00 Analyzed.31-Aug-00 <br /> Cadmwm 0 960 0 010 M94 100 960 90-120 409 20 <br /> arcamnim 0 980 0 010 too 99.0 80.120 302 20 <br /> Lead _ _ -100 _ ___.0 020_ _" __I 00 .___.___._..100_— M120 _498 _ --20 <br /> Nrckal 0 960 0 050 100 960 M120 104 20 <br /> Zino 106 0 020 100 106 80-120 370 20 <br /> Matrix Spike(OH21012-MS1) Source:W009351-01 Prepared 21Aug-00Analyzed.31 Aug-00 <br /> Cadmmm 100 0 010 mga 100 ND 100 80-120 <br /> Owantum 100 0 010 100 ND 100 M120 <br /> lead 110 0 020 " 100 0 098 100 80-120 <br /> Nickel 0 970 0 050 " 100 ND 970 W120 <br /> zmc 110 0 020 100 ND 108 80-120 <br /> Matrix Spike Dup(OH21012-MSDI) Source W008351-01 Prepared.21-Aug-OO Analyzed,31-Aug-00 <br /> Cadmmm 110 0 010 mg/l 100 ND 110 80.120 952 20 <br /> Chramitms 0 990 0 010 " 100 ND 990 M120 101 20 <br /> Lead - 110 0 020 " 100 0 098 loo 80-120 0 20 <br /> N:rr-1 1 02 A ACA " i 00 NM 102 201.20 503 213 <br /> Zmc 110 0 020 " 100 ND 108 90-120 0 20 <br /> Sequoia Analytical-wahim geek The mss in Odic report spry to Ow sompkr d in accordawe wM dw dwn of <br /> custody docmwmx This anadytical nepvrt must be mpmdmeed In Its eadnety <br /> Page 13 of 21 <br />