SITE INFORMATION AND CORRESPONDENCE_CASE 2

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2901 Louise Chronology Page 2 1993 6/15/93 Two underground storage tanks were removed and soil samples collected. See the above and below summary of the results. GC/MS Analysis of Selected Samples Collected During Tank Removal Sample ID T2A T2A-19' T2B T2C T2C-17' T2C-19' T2S1 (AB) T2S2 (AB) 1,1,2- <.05 <.50 9.9 .200 <.50 <.005 <.05 <.005 Trichloroethane 1,1,2,2- <.05 <.50 .590 .100 <.50 <.005 <.05 <.005 Trichloroethane 4-Methyl-2- <.10 <.50 12.0 1.3 <1.0 <.010 <.10 <.010 pentanone Benzene .120 .920 26.0 <.05 <.50 <.005 <.05 <.005 Bromodichloro <.05 <.50 .620 <.50 <.50 <.005 <.05 <.005 methane Bromomethane .076 <.50 .530 .093 <.50 <.005 .140 <.005 Chloromethane .350 <.50 <.50 .360 <.50 <.005 .300 <.005 Ethylbenzene .570 2.6 110.0 2.9 2.0 <.005 <.05 <.005 Styrene <.05 <.50 2.9 <.05 <.50 <.005 <.05 <.005 Toluene 1.7 <.50 93.0 1.3 .780 <.005 <.05 <.005 Xylene .990 3.5 54.0 4.9 3.7 <.005 <.05 <.005 Note: All results in ppm (mg/kg) 7/7/93 Over-excavation of contaminated soil was initiated. Soil samples were collected throughout the excavation process. See the attached Tabular Summary of Analytical Data July 1993 and the Tabular Summary of Analytical Data 8240 GC/MS Analysis. 10/29/93 The on site facility well was sampled. No contamination was detected. 1994 10/10/94 Five soil borings were drilled and sampled, three of which were converted into monitoring wells. See the attached boring logs and Laboratory Analysis - Soil Borings Table. 12/09/94 The residual soil contamination in the stockpiled soil was evaluated. See the attached Spoils Pile Sampling Locations - December 9, 1994 (corrected from December 4, 1994) and the Laboratory Results - Soil Stockpile. 1995 Groundwater samples were collected on July 3, 1995 and October 2, 1995. See the attached Laboratory Analysis - Water and Groundwater Elevation Data.