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POSITIVE <br /> 781 East Washington Blvd , Los Angeles, CA 90021 <br /> ML" Or LAB SERVICE (213) 745-5312 FAX (213) 745-6372 <br /> February 1, 2000 <br /> QUALITY CONTROL DATA <br /> Matrix Spike, Duplicate Spike and LCS <br /> 1 <br /> CLIENT Orion Environmental, Inc <br /> FILE NO. 73287 <br /> REPORT NO 20000173 <br /> MATRIX Water <br /> METHOD. EPA 8015B <br /> LAB NO- 20000173-004 <br /> BATCH NO 00288015B <br /> DATE EXTRACTED- 01/28/00 <br /> DATE ANALYZED 01/28/00 <br /> SPIKE <br /> SAMPLE AMOUNT AMOUNT RECOVERY <br /> RESULTS SPIKED RECOVERED ACCEPTANCE <br /> PARAMETER (ug/1) (ug/1) (ug/1) 1� REC RANGE(%) R P D <br /> Gasoline (S) ND 182 220 121 <br /> Gasoline (DS) ND 182 200 110 65-135 10 <br /> LCS AMOUNT RECOVERY <br /> CONCENTRATION RECOVERED ACCEPTANCE <br /> Parameter (ug/] ) (ug/1) %REC RANGE(%) <br /> Gasoline 910 952 105 75-125 <br /> S = Spike <br /> DS = Duplicate Spike <br /> • LCS = Laboratory Control Sample <br /> R P D = Relative Percent Difference <br /> ND = None Detected <br />