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A13 POSITIVE <br /> 781 East Washington Blvd , Los Angeles, CA 90021 <br /> LAB SERVICE (213) 745-5312 FAX (213) 745-6372 <br /> May 25, 2000 <br /> QUALITY CONTROL DATA <br /> Laboratory Check Sample <br /> Client Orion Environmental, Inc <br /> File No 73287 <br /> Report No 20001027 <br /> Matrix Water <br /> Method EPA 8260E <br /> Batch No 01368260-I <br /> Date Extracted 05/15/00 <br /> Date Analyzed 05/15/00 <br /> SPIKE <br /> AMOUNT AMOUNT RECOVERY <br />' SPIKED RECOVERED ACCEPTANCE <br /> PARAMETER (ug/1.) {ug/1) % REC RANGE(%) <br /> 1, 1-Dichloroethene 20 19 8 99 75-125 <br /> Trichloroethene 20 20 2 101 75-125 <br /> Benzene 20 19 9 100 75--125 <br /> Toluene 20 17 7 89 75-125 <br /> Chlorobenzene 20 20 0 100 75-125 <br /> Surrogate <br /> Toluene D-8 20 19 6 98 75-125 <br /> LCS = Laboratory Check Sample <br /> R P D = Relative Percent Difference <br /> ND = None Detected <br /> L <br />