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f►n� tY <br /> Sequoia 680 esapeake Drive Redwood City CA 9406, (650) 364-9600 FAX(650) 364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (9Z5)988 9600 FAX(925)988-9673 <br /> 111W� 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792-1865 FAX(707)792-0342 <br /> ATC Associates, Inc Client Project ID KOK Reality 62581 0001 <br /> 1260 Graphics Drive <br /> Modesto, CA 95351-1502 <br /> Attention Tom Lutterman QC Semple Group 9808939-01 Reported Sep 1, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 405 1 <br /> Analyst B ANDERSON <br /> ANALYTE Biochemical Oxygen Demand <br /> QC Batch # ING81498405100A <br /> Sample No 9808915-01 <br /> Date Prepared 8114/98 <br /> Date Analyzed 8119198 <br /> Instrument I D # Manual <br /> Sample <br /> Concentration mg/L 12 <br /> Duplicate <br /> Concentration mg/L 10 <br /> Relative % Difference 18 <br /> RPD Control Limits 0-30 <br /> Percent Recovery Control Limits <br /> F- LCS 80 120 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br /> Please Note <br /> The LCS is a control sample of known interferent free matrix that is analyzed using the some reagents <br /> SEQUOIA ANALYTICAL preparation and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference the LCS recovery is to be used to validate the batch <br /> K n Kimyq � <br /> Project Manager <br />