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' ® Sequoia 680 Chesapeake Drive d CIry CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Line Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowall 81vd.Horth.Ste.D Petaluma CA 94954 (707)792-1865 FAX(7D7)792-0342 <br /> =Deanna <br /> 6iin� Client fro ect tS not l SS#2859, toc on `t,Suite J Matrix Liquid8a Harding OC Sample Group 9024606-619 Reported Feb t 1, 1999} <br /> 1 DUALITY CONTROL DATA REPORT <br /> Analyte' Dissolved Carbon Dissolved Dissolved Dissolved pH <br /> ' Choxide oxygen Nitrogen Methane <br /> Analy.Method. 3416M 3416M 3416M 3416M EPA 1501 <br /> Prep Method. - - - - EPA 150 1 <br /> ' Analyst* K Grubb K Grubb K Grubb K Grubb K Anderson <br /> ' Duplicate <br /> Sample# 9020608 9020608 9020608 9020608 9024661 <br /> ' Prepared Date 2/8/99 2/8/99 2/8/99 2/8/99 2/5/99 <br /> Analyzed Date 2/8/99 2/8/99 2/8/99 2/8/99 2/5/99 <br /> Instrument I D # HP-8A HP-8A HP-BA HP-8A INPH-1 <br /> ' Sample <br /> Concentration 9 1% 25% 10% 56% 75 pH Units <br /> Dup.Sample <br /> Concentration 10% 34% 14% 57% 7 4 pH Units <br /> ' RPD 94 31 33 1a 13 <br /> RPD Limn: 0-50 0-50 0-50 0-50 0,34 <br /> 1 <br /> 1 SEQUOIA ANALYTICAL,#1271 <br /> ' ?11anne=egley <br /> Project Manager •»APD.Rela&e%Difference <br /> 9020606 GET <30> <br /> 1 <br />