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1455 McDowell Blvd North Ste D <br /> SequoiaPetalum t CA 94954 <br /> (707)792-1865 <br /> �iN tic l FAX(707)792-0342 <br /> 0 <br /> www sequoialahs tom <br /> URS Corp-Sacramento Project Arco Site 5469,Stockton CA P403099 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36605 Reported <br /> Sacramento CA 95833 Project Manager Jay Johnson 04/06/04 17 16 <br /> Anions by EPA Method 300.0- Quality Control <br /> Sequoia Analytical - Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Leel Result %PIEC Limits RPD Limit Notes <br /> Bath 4030178-General Preparation <br /> Blank(4030178-BLKI) _ _ Prepared 03/04/04 Analy ed 0_3105/04 _ <br /> Nitrate as NO3 ND 890 ugll <br /> Sulfate as SO4 ND 1000 " <br /> Laboratory Control Sample(4030178-BSI) Prepared 03/04/04 Analyzed 03/05/04 <br /> Nitrate as NO3 46100 890 Ug/1 44300 104 90-110 <br /> Sulfate as SO4 10800 1000 10000 108 90-110 <br /> Matrix Spike(4030178-MS1) Source P403099-04 Prepared 03/04/04 Analyzed 03/05/04 <br /> Nitrate as NO3 46300 1800 ug/l. 44300 ND 105 80-120 <br /> Sulfate as SO4 21700 2000 10000 11000 107 80-120 <br /> Matrix Spike Dup(4030178-MSDI) Source P403099-04 Prepared 03/04/04 Analyzed 03/05/04 <br /> Nitrate as NO3 46400 1800 ug/l 44300 ND 105 80-120 0 2 20 <br /> ate as SO4 21900 2000 10000 11000 109 SO-120 0 9 20 <br /> teh 4030256-General Preparation <br /> Blank(4030256-BLKI) Prepared&Analyz+d 03/10/04 <br /> Nitrate as NO3 ND 690 ug/l <br /> Sulfate as SO4 ND 1000 " <br /> Laboratory Control Sample(4030256-BSI) Prepared&.Analyzed 03/10/04 <br /> Nitrate ati NO3 45100 890 ug/l 44300 109 90-110 <br /> Sulfate as SO4 10900 1000 10000 109 90-110 <br /> Matrix Spike(4030256-MSI) Source P402446-15 Prepared&Analyzed 03/10/04 <br /> Nitrate as NO3 2400000 89000 ug/l 2220000 ND 108 80 120 T <br /> Sulfate as SO4 3220000 100000 500000 2600000 124 80-120 zQM07 <br /> Lima Analytical-Petaltuna The result5 in this report appli to the camplec airall-ed in accoidunce iirtlr the ebain <br /> of c usrndi document Ltilt ce other n tee stuted i e iuttc are i epor tett on a x et tit rght <br /> husrs Thts uttalilrcal report niuit hr'rrprndrrcrd lir its crrtuety <br /> Page 33 of 35 <br />