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Client No: 4.08 Date: 10-09-91 <br /> tt ient Name: Bron i Caldwell Page: 3 <br /> r NET Paeifsc,Inc NET Loy No: 1042 <br /> Ref: ARCO, Facility 2133, Stockton <br /> DUALITY CONTROL DATA <br /> Cal Verf Duplicate <br /> Reporting Stund X Stank Spike X Spike % <br /> Parameter Limits Unita Recovery Data Recovery Recovery RPD <br /> Gasoline 0.05 ag/1. 96 NO 97 90 7.5 <br /> Be,-Zane 0.5 ug/L 103 ND Ila 102 7.5 <br /> Toluene 0.5 u-1,/L 105 ND 102 98 4..0 <br /> C0MWNT: @lank Results were ND on other analytes tested. <br /> OUALITY CONTROL DATA <br /> Cal Verf Duplicate <br /> Reporting Stand X St" Spike X Spike X <br /> Parwieter Limits Units Recovery Data Recovery Recovery RPO <br /> Caduiun 0.02 ng/L 99 ND 100 96 5.1 <br /> Chroniun, total 0.02 ag/L 106 ND 104 99 4.9 <br /> Copper 0.02 Wt. 105 ND 95 100 5.1 <br /> Lead (EPA 7421) 0.002 ng/L 90 ND 118 iib a T <br /> Nickel 0.05 eg/L 107 ND 107 102 4.8 <br /> Zinc 0.02 ag/L 103 NO 105 96 a.3 <br /> ., i <br />