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0 M M <br /> TA E 2 ! M M = M M <br /> SUMMARY OF VAPOR EXTRACTION SYSTEM DATA <br /> Farmer Property, Stockton, CA <br /> Page 6 of 6 <br /> Vacuum owra a reported in parts per million volume my <br /> Sample ID Date inches of cubic feet reading TPHg Benzene Toluene Ethyl Xy!71- <br /> VW4 <br /> MTBE ETBE TBA DIPS TAME <br /> Mercury er minut (ppm) Benzene <br /> 12/20/02 90 NM NM 420 38 75 85 238 <0 002 <0 002 <0 005 <0 002 <0 002 <br /> 12/23/02 85 NM NM NS NS NS NS NS NS NS NS NS NS <br /> 12/27/02 95 NM 32 NS NS NS NS NS NS NS NS NS NS <br /> 01/03/03 62 NM 70 NS NS NS NS NS NS NS NS NS NS <br /> 04/18/03 15 22 112 NS NS NS NS NS NS NS NS NS NS <br /> 04/30/03 SYSTEM DOWN <br /> 05/02/03 25 35 113 130 025 1 5 1 7 79 <0 100 <0 100 <0 250 <0 100 <0 100 <br /> 05/21/03 13 28 442 75 <0 050 <0 050 06 491 <0 100 <0 100 <0 250 <0 100 <0 100 <br /> 06/09/03 20 NM 120 NS NS NS NS NS NS NS NS NS NS <br /> 06/25/03 32 29 803 78 038 22 087 69 <0 010 <0 010 <0 025 <0010 <0 010 <br /> 07/29/03 SYSTEM DOWN <br /> 08/01/03 23 NM 41 29 0 069 029 015 18 <0 100 <0 100 <0 250 <0100 <0 100 <br /> 08/29/03 25 1150 41 34 0 054 0 093 <0 050 1 04 <0 100 <0 100 <0 250 <0 100 <0 100 <br /> 09/30/03 30 NM 0 28 0 085 026 017 163 <0 100 <0 100 <0 250 <0 100 <0 100 <br /> 10/24/03 30 44 105 30 <0 050 <0 050 <0 050 0 304 <0 100 <0 100 <0 250 <0 100 <0 100 <br /> 11/21/03 40 13 51 <2 5 <0 050 058 010 089 <0 100 <0 100 <0 250 <0 100 <0 100 <br /> 12/30/03 NM NM 1 7 14 0 050 <0 050 <0 050 <0 150 <0 100 <0 100 <0 250 <0 100 <0 100 <br /> Notes <br /> < denotes not detected at or above Stated Method Detection Limit <br /> TPHg denotes Total Petroleum Hydrocarbons as gasoline, analyzed by EPA Method 5030/8015 <br /> MTBE denotes methyl tertiary butyl ether by EPA Method 8260 <br /> ETBE denotes ethyl tertiary butyl ether by EPA Method 8260 <br /> TBA denotes tertiary butyl ether by EPA Method 8260 <br /> DIPE denotes di-isopropyl ether by EPA Method 8260 <br /> TAME denotes tertiary amyl methyl ether by EPA Method 8260 <br /> ppm denotes parts per million <br /> NM denotes not monitored <br /> NA denotes not applicable <br /> NS denotes not sampled <br /> Vapor wells VW3 and VW4 were closed 118103 <br /> W M5964TABLESVemediationsystema <br />