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Marlowe Page 2 <br />12/21/92 Monitoring well, MW2 was installed to continue the investigation of <br />groundwater contamination. MW1 which had been installed in 1988f no <br />longer contained groundwater in which to sample. The total dept of MW1 <br />was 80 feet and screened between 40' and 80'. Contamination, 13 ppm <br />volatile compounds and a slight odor, were noted during the installation of <br />MW2 at 95', just below water. MW2 was drilled to a total depth of 110' and <br />screened between 109.5' and 79.5'. <br />01/08/93 MW2 was sampled this date. The results of sampling were included in the <br />"Monitoring Well Installation Report, December 1992" which PHS/EHD <br />received February 9, 1993. Groundwater contaminants were detected: <br />Contaminant Concentration (ppb) <br />Benzene 1.0 <br />TPH-gas (not typical pattern) 83.0 <br />1,1-Dichloroethene (1,1-DCE) 120.0 <br />Dichloromethane (Methylene Chloride) 0.62 <br />t-1,2-Dichloroethene (t-1,2-DCE) 0.12 <br />1,1-Dichloroethane (1,1-DCA) 3.7 <br />Chloroform 0.15 <br />1,1,1 Trichloroethane (1,1,1-TCA) 16 <br />Trichloroethene (TCE) 36 <br />c-1,2-Dichloroethene (c-1,2-DCE) 0.78 <br />WEST results, Attachment 3. <br />03/02/93 PHS/EHD requested that the non-community water well be resampled and <br />analyzed along with the monitoring well to confirm that the drinking water <br />well has not been impacted by the contaminants detected in the monitoring <br />well sample collected January 8, 1993. <br />04/08/93 MW2 was sampled this date as part of the quarterly monitoring requirement. <br />The on site non-community water well was also sampled and analyzed for <br />chlorinated hydrocarbons as was requested by PHS/EHD due to contaminants <br />which were detected in the January 8, 1993 sample results; contaminants <br />detected. FGL results, Attachment 4. <br />04/30/93 Marlowe notifies tenants not to drink the on site water and provides bottled <br />water. (Exhibit #1) <br />05/04/93 The on site non-community water well was resampled and analyzed for <br />chlorinated hydrocarbons as a result of analytical results from April 8, 1993; <br />contaminants detected. WEST results, Attachment 5.