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r Roy F. Weston, Inc. Stockton Laboratory Purgeable Aromatics by GC, Method 602 Report Date: 10/17/92 16.26 RFW Batch Number 92105019 Client. WESTON ECON EAST BAY MD Work Order- 06415-001-002 Page- 1 Cust ID. MW-1 MW-2 MW-3 MW-4 MW-5 MW-6 Sample RFW#. 001 002 003 004 005 006 Information Matrix WATER WATER WATER WATER WATER WATER D.F 10.0 1.00 1 00 1 00 1 00 1 00 Units. UG/L UG/L UG/L UG/L UG/L UG/L aaa-Trifluorotoluene 121 % 99 % 98 % 96 % 94 % 95 % -----------------------------__----------------fl- ---fl--------�___fl------------��-fl------------fl------------fl Benzene 120 0 50 U 0.50 U 0.50 U 0.50 U 0 50 U Ethylbenzene 4.9 J 0 50 U 0.50 U 0.50 U 0.50 U 0 50 U Toluene 4.6 J 0.50 U 0.50 U 0 50 U 0.50 U 0.50 U Xylene (total ) 23 0.50 U 0.50 U 0 50 U 0 50 U 0.50 U Cust ID- MW-1 MW-8 MW-9 MW-9 MW-9 BLK Sample RFW#: 007 008 009 009 MS 009 MSD 92SVo283-MBI Information Matrix WATER WATER WATER WATER WATER WATER D.F. 1.00 10.0 1.00 1.00 1.00 1 .00 Units UG/L UG/L UG/L UG/L UG/L UG/L aaa-Trifluorotoluene 97 % 110 % 46 * % 96 % 110 % 103 % --------------------------__-____��____..-------f1=====__=====fl------------fl------------fl------------fl------------fl Benzene 0.50 U 130 0.50 U 106 % 126 % 0.50 U Ethylbenzene 0.50 U 4.8 J 0.50 U 91 % 110 % 0.50 U Toluene 0.50 U 5.8 0.50 U 95 % 118 % 0.50 U Xylene (total ) 0.50 U 24 0.50 U 0.50 U 0 50 U 0.50 U U= Analyzed, not detected. J= Present below detection limit. B= Present in blank. NR= Not requested. NS= Not spiked. %= Percent recovery. D= Diluted out. I= Interference. NA= Not Applicable. *= Outside of Advisory limits. I