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1 <br /> COULA-B CORE LABORATORIES <br /> Q U A L I T Y C 0 N T R 0 L R E P O R T <br /> 04/06/98 <br /> dOB NUMBER: 980544 CUSTOMER. Fluor Daniel GTI ATTN: Greg Mason <br /> olatile Aromatics by EPA 602 DATE ANALYZED 03/26/98 TIME ANALYZED. 00 00 METHOD- EPA 8020 QC NUMBER 967001 <br /> M A T R I X S P I K E S <br /> TEST ANALYSIS ANALYSIS DILUTION ANALYZED ORIGINAL SPIKE PERCENT DETECTION UNITS OF <br /> DESCRIPTION SUBTYPE I D. FACTOR VALUE VALUE ADDED RECOVERY LIMITS MEASURE <br /> Benzene MATRIX 980549-001 1 21 6 0 0 20.0 108 0 3 ug/L <br /> MATRIX DUP 980549-001 1 21 6 0 0 20.0 108 0 3 ug/L <br /> Ethylbenzene MATRIX 980549-001 1 20 5 0 0 20 0 102 0 5 ug/L <br /> MATRIX DUP 980549-001 1 20 8 0 0 20 0 104 0 5 ug/L <br /> Toluene MATRIX 980549-001 1 20 3 0 0 20 0 102 0 3 ug/L <br /> MATRIX DUP 980549-001 1 20 4 0 0 20.0 102 0 3 ug/L <br /> Total Xylenes MATRIX 980549-001 1 62 4 0 0 60.0 104 0 6 ug/L <br /> MATRIX DUP 980549-001 1 63 8 0 0 60.0 106 0 6 ug/L <br /> m-Chlorotoluene (SURROGATE) MATRIX 980549-001 1 107 0 0 100 107 0 % Recovery <br /> MATRIX DUP 980549-001 1 116 0 0 100 116 0 % Recovery <br /> 1250 Gene Autry Way <br /> Anaheim, CA 92805 <br /> (714) 937 1094 <br /> PAGE 12 <br />