ARCHIVED REPORTS_SOIL AND GROUNDWATER INVESTIGATION REPORT 2006

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Geomatrix TABLE 6 SUMMARY OF GROUNDWATER SAMPLE ANALYTICAL RESULTS FOR VOLATILE ORGANIC COMPOUNDS ' TAOC Tracy Gravel Pits Tracy, California Concentrations in micrograms per liter ( µg/L) 1 ,3- 1 ,4- 1 ,3 - 2 ,2- l , l - Dibromo- 112- Dichloro- 1 , 1 - 122- 1 , 1 - cis- 1 ,2- trans- 1 , 2- 1 , 2- cis- 1 ,3 - trans- 1 ,3- Hexa- p- Sample Sample dichloro- dichloro- Dichloro- Dichloro- Dichloro- 3-chloro- Dibromo- Dibromo- difluoro- Dichloro- Dichloro- Dichloro- Dichloro- Dichloro- Dichloro- Dichloro- Dichloro- Ethyl- chloro- 2- Isopropyl- Isopropyl- Methylen Name Date benzene benzene propane propane propene propane ethane methane methane ethane ethane ethene ethene ethene propane propene propene benzene butadiene Hexanone benzene toluene Chloride GMX -24-082205 08/22/05 <0 . 50 <0 . 50 < 1 . 0 <0 . 50 <0 . 50 < 1 . 0 <0 . 50 <0. 50 <0. 50 <0. 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 < 1 . 0 <50 <0 . 50 < 1 . 0 <5 . 0 GMX-25 -082305 08/23/05 <0 . 50 <0 . 50 < 1 . 0 <0 . 50 <0 . 50 < 1 . 0 <0. 50 <0 . 50 <0 . 50 <0. 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 < 1 . 0 <50 <0 . 50 < 1 . 0 <5 . 0 GMX-26 -082505 08/25/05 <0. 50 <0 . 50 < 1 . 0 <0. 50 <0 . 50 < 1 . 0 <0. 50 <0 . 50 <0 . 50 <0. 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 < 1 . 0 <50 <0 . 50 < 1 . 0 <5 . 0 GMX -27-082405 08/24/05 <0 . 50 <0 . 50 < 1 . 0 <0 . 50 <0. 50 < 1 . 0 <0. 50 <0 . 50 <0 . 50 <0. 50 <0 . 50 <0 . 50 <0. 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 < 1 . 0 <50 <0 . 50 < 1 . 0 <5 . 0 - - - - -- - - - - - - -- - - - - - - - - - - --- - - - - - - - - - - - - - - - - - - - - -- --- - GMX-28 -082205 08/22/05 <0 . 50 <0 . 50 1 :\Doc_Safe\7000s\7066.001 \Reports\2005 Soil Investigation and Well Survey\2 Tables\Summary Tables Gravel Pits_Tables 1 -7 Page 2 of 3