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Table 4-2 Analytical Results for Petroleum Hydrocarbons DISCO Site Additional Investigation Groundwater Samples (Units inµg/L) Sample ID CPT-1(74') CPT-1(901) CPT-2(641) CPT-2(941) CPT.3(911) CPT-3(911) CPT4(751) CPT4(97') CPT-5(76') CFF-5(97') EB-1 Duplicate Sampling Date 12/20/1999 12/20/1999 12/20/1999 12/20/1999 12/22/1999 12/2211999 12/21/1999 12/21/1999 12/21/1999 12/21/1999 12/21/2000 Dilution 1:1 1 1:200 1:I 1:50 1:500 1:500 1:100 1:500 1:1 1:500 1:1 Benzene 3.6 - 25,000 0.5 U 40 - 26,000 :26,OMOMD — 14,000 -15,000 0.5 U 15,000 0.50 U Toluene _ --_ 0.5 U 35,000 0.93* U 3,700_ — 39,000 13,000 29,000 0.5 U 21000 1.80 Ethylbenzene 0.5 U 1,700 -_- —0.63* U 1,400 2,200 _ 1,000 2,100 0.5 U 1,700 0.77 lens(Total) 0.5 U 15,000 19* U 7,100 19,000 7,200 16,000 0.5 U 11,000 4.10 H as Gasoline 380** 150 000 54* U 37000 200 000 0 66 000 160 00(1 50 U i10 000 63.00 Dilution I.1 1.20 I:1 1:4 1.200 1:200 1:200 1:200 1:1 1:4 1:1 1,2-Dibromoethane(EDB)- ---0.5-- U - 1400 0.5 U - 2.0 U ^-420 _ 460 T 110 -- -340 0.5 U 270 0.5 U 1,2-Dichloroethane 1,2-DCA 23 1000 0.5 U 2.0 U 590 640 2000 670 19 450 0.5 U Dilution 1:1 1:100 1:1 1.10 1.200 1:200 1:200 1:200 1:1 1.100 1:1 5 U 500 U 5 U50 U 1000 U 1000 U 1000 U 1000 U 5 U 500 U 5 U ten-Butanol — 5 U 500 U 5 U 50 U 1000 U 1000 U 1000 U 1000 U S U 500 U 5 U Dias ro tether 10 U 1000 U 10 U ]00 U 2000 U 2000 U 2000 U 2000 U 10 U 1000 U 10 U Eth 1-tert-butyl ether 5 U 500 U 5 U 50 U 1000 U 1000 U 1000 U 1000 U _ 5 U 500 U 5 U tent-Amy]Meth 1 ether 5 U 500 U 5 U 50 U 1000 U 1000 U 1000 U 1000 U 5 U 500 U 5 U Notes: jj U -Compound analyzed for but not detected. The reporting limit is presented to the left of the U. Bold values are detections above the analytical reporting limit. *Results treated as non-detect due to detections in associated equipment blank Hydrocarbon reported in gasoline range does not match laboratory gasoline standard Data.xls Page 1 of 4 06/26/2000