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Exhibit C <br /> Table 1 <br /> Analytical and Groundwater Elevation Data <br /> Premcor Store#1359 <br /> 1550 East Pershing Road <br /> Decatuq Illinois <br /> Depth to Free Product Equivalent <br /> Reference Water Benzene Toluene Ethylbenzene Xylenes <br /> Sample ID Sampling Date Elevation(feet) �'�'ater Thickness Elevation (ug/L) (ug/L) (ug/L) (ug/L) Comments <br /> (feet) (feet) <br /> (feet) <br /> MW-1 3/IS/1999 498.13 3.80 -- 49433 BDL BDL BDL BDL <br /> MW-2 3/15/1999 496.93 2.64 - 494.29 2 400 4 900 2 600 1 I 900 Stron Petroleum Odor <br /> MW-3 3/15/1999 497.58 3.98 -- 493.60 200 16 42 80.6 Stron PetroleumOdor <br /> MW-4 3/15/1999 498.06 3.32 -- 494.74 BDL BDL BDL BDL <br /> MW-5 8/16/2000 495.85 4.80 - 491.05 BDL BDL BDL BDL Clear No Petroleum Odor <br /> MW-6 8/16/2000 494.60 4.68 489.92 BDL BDL BDL BDL Clear No Petroleum Odor <br /> MW-7 8/16/2000 494.96 3.90 - 491.06 BDL BDL BDL BDL Sl.Turbid No PetroleumOdor <br /> Class I Groundwater <br /> m � . � 5 1,000 700 IQ000 <br /> Class Ii Groundwater 25 2,500 1,000 10,000 <br /> NOTE: t. ug/L=micrograms per liter <br /> 2.Tier[groundwater cleanup objective per IEPA TiUe 35,Part 742-Tiered Approach to Corrective Action <br /> Objectives(TACO). <br /> 3. Elevations based on NGVD. <br /> 4. Comments based on field observations. <br /> 5. NA=Not Available <br /> 6. NS=Not Sampled <br /> 7. FP=Free Product <br /> 8. BDL=Below Detection Limits <br />' 9. Xylenes are presented as total xylenes. <br /> Page 1 of 1 <br /> � <br />