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®i 819 Striker Avenue,Suite 8 <br /> Sequa Savamento,CA 95&U <br /> (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical www.sequoialabs.com <br /> EMCON/IT-Sacramento Project: Foothill Landfill,San Joaquin County <br /> 1433 N.Market Blvd. Project Number: 791289 Reported: <br /> Sacramento CA,95834 Project Manager: Steve Giacomini 05/15/01 11:33 <br /> Anions by EPA Method 300.0 -Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result MDL Limit Units Level Result "AEC Limits RPD Limit Notes <br /> Batch 1050029-General Preparation <br /> Blank(1050029-BLK1) Prepared&Analyzed:04/30/01 <br /> Chloride 0.303 0.0250 0.400 mg/t J <br /> Nitrate as N ND 0.00450 0.0226 <br /> Sulfate as SO4 0.251 0.0210 0.300 J <br /> LCS(1050029-BS1) Prepared&Analyzed:04/30/01 <br /> Chloride 4.83 0.0250 0.400 mg/l 5.00 96.6 80-120 <br /> Nitrate as N 1.11 0.00450 0.0226 1.13 98.2 80-120 <br /> Sulfate as SO4 9.83 0.0210 0.300 " 10.0 98.3 80-120 <br /> Matrix Spike(1050029-MS1) Source:5104388-05 Prepared&Analyzed:04/30/01 <br /> Chloride 4.65 0.0250 0.400 mg/i 5.00 0.175 89.5 75-125 <br /> Nitrate as N 1.09 0.00450 0.0226 1.13 ND 965 75-125 <br /> Sulfate as SO4 9.65 0.0210 0.300 10.0 ND 96.5 75-125 <br /> Matrix Spike Dup(1050029-MSD1) Source:S104388-05 Prepared&Analyzed:04;30/01 <br /> Chloride 4.94 0.0250 0.400 mg/I 5.00 0.175 953 75-125 6.05 20 <br /> Nitrate as N 1.09 0.00450 0.0226 1.13 ND 96.5 75-125 0 20 <br /> Sulfate as SO4 9.79 0.0210 0.300 10.0 ND 911.9 75-125 1.44 20 <br /> Sequoia Analytical-Sacramento The results in this report apply to dw samples analyzed in accordance with the chain of <br /> custody document.This analytical report must be reproduced in its entirety. <br /> Page 8 of 13 <br />