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�y <br /> Arl POSITIVE <br /> 781 East Washington Blvd , Los Angeles, CA 90021 <br /> LAB SERVICE (213) 745-5312 FAX (213) 745-6372 <br /> February 1, 2000 <br /> QUALITY CONTROL DATA <br /> Matrix Spike and Duplicate Spike <br /> LClient Orion Environmental, Inc <br /> File No 73287 <br /> Report No 20000173 <br /> Matrix Water <br /> Method EPA 8260B <br /> Lab No: 20000173-003 <br /> L Batch No 00288260-I <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) % REC RANGE M R P D. <br />�• 1, 1-Dichloroethene (S) ND 20 18 2 91 <br /> 1, 1-Dichloroethene (DS) ND 20 17 4 87 50-107 4 <br /> Trichloroethene (S) ND 20 18 9 95 <br /> Trichloroethene (DS) ND 20 17 8 89 59-134 7 <br /> Benzene (S) ND 20 20 2 101 <br /> Benzene (DS) ND 20 19 7 99 67-119 2 <br /> Toluene (S) ND 20 19 0 95 <br /> Toluene (DS) ND 20 17 7 89 69-139 7 <br /> Chlorobenzene (S) ND 20 20 8 104 <br /> Chlorobenzene (DS) ND 20 18 2 91 88-119 7 <br /> Surrogate <br /> Toluene D-8 (S) 20 19 8 99 <br /> Toluene D-8 (DS) 20 20 6 93 75-125 6 <br /> S = Spike <br /> DS = Duplicate Spike <br /> R P D = Relative Percent Difference <br /> ND = None Detected <br />