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'Table 4 Groundwater Monitoring Results-BTEX/TPH as Gasoline Analyses Del Monte Disco Property Stockton,California Concentration(u ) Sample TPH Ethyl Well Date Gasoline Benzene Toluene benzene Xylenes Dilution Lead TCLP - 500 - - - 5,000 MCL - 1 1,000 680 1,750 50 MW-DIS-5 09/04/1991 <50 <0.5 <0.5 <0.5 <0.5 <1.6 �I 06/30/1992 <50 <0.5 <0.5 <0.5 <0.5 03103/1995 <50 <0.3 <0.3 <0.3 <0.3 NS 12/22/1997 <50 <0.3 <0.3 <0.3 <0.3 1:1 NS 04/16/1998 <50 <0.3 <0.3 <0.3 <0.3 1:1 NS 07/22/1998 <50 <0.3 <0.3 <0.3 <0.3 1:1 NS 11/11/1998 <50 <0.3 <0.3 <0.3 <0.3 1:1 NS 03/1911999 <50 <0.3 <0.3 <0.3 <0.3 1:1 NS 07115/1999 <50 <0.3 <0.3 <0.3 <0.3 1:1 NS 11/08/1999 NS NS NS NS NS NS 03/29/2000 NS NS NS NS NS NS 06/28/2000 NS NS NS NS NS NS 1 MW-513B 02/10/1999 <50 <0.3 <0.3 <0.3 <0.3 1:1 NS MW-DIS-6 09/03/1991 <50 <0.5 <0.5 <0.5 <0.5 <0.8 06/30/1992 <50 <0.5 <0.5 <0.5 <0.5 10/01/1992 <50 <0.5 <0.5 <0.5 <0.5 NS 01/21/1993 <50 <0.5 <0.5 <0.5 <0.5 1 NS 03/29/1993 <50 <0.5 <0.5 <0.5 <0.5 NS 07/20/1993 NS NS NS NS NS <0.6 09/30/1993 <50 <0.5 <0.5 <0.5 <0.5 NS 01/11/1994 <50 <0.5 <0.5 <0.5 <0.5 NS 04/14/1994 <50 <0.5 <0.5 <0.5 <0-5 NS 07/20/1994 <50 <0.5 <0.5 <0.5 <0.5 <0.6 10/27/1994 <50 <0.5 <0.5 <0.5 <0.5 NS 03/03/1995 <50 <0.3 <0.3 <0.3 <0.3 NS 12/22/1997 <50 <0.3 <0.3 <0.3 <0,3 1:1 NS 04/16/1998 <50 <0.3 <0.3 <0.3 50.3 1:1 NS --� 07/22/1998 <50 <0.3 <0.3 <0.3 <0.3 1:1 NS 11/11/1998 <50 <0.3 <0.3 <0.3 <0.3 1:1 NS 02/10/1999 <50 <0.3 <0.3 <0.3 <0.3 1:1 NS 07/15/1999 <50 <0.3 <0.3 <0.3 <0.3 1:1 NS 11/08/1999 NS NS NS NS NS NS 03/29/2000 NS NS NS NS NS NS 06/28/2000 NS NS NS NS NS NS MW-DIS-7S 09/04/1991 <50 <0.5 <0.5 0.5 <0.5 06/30/1992 <50 <015 <0.5 <0.5 <0.5 10/01/1992 <50 <0.5 <0.5 <0.5 <0.5 NS 01/21/1993 <50 <0.5 <0.5 <0.5 <0.5 NS 03/29/1993 <50 <0.5 <0.5 <0.5 <0.5 NS 07/20/1993 <50 <0.5 <0.5 <0.5 <0.5 <0.6 09/30/1993 <50 <0.5 <0.5 <0.5 <0.5 NS 01/11/1994 <50 <0.5 <0.5 <0.5 <03 NS 04/14/1994 <50 <0.5 <0.5 <0.5 <0.5 NS 07/20/1994 <50 <0.5 <0.5 <0.5 <0.5 <0.6 10/27/1994 <50 <0.5 <0.5 <0.5 <0.5 NS 03/03/1995 <50 <0.3 <0.3 NS 12122/1997 <50 <0.3 <0.3 <0.3 <0.3 2:1 NS 04116/1998 <50 <0.3 <0.3 <0.3 <0.3 1:1 NS 07/23/1998 <50 <0.3 <0.3 <0.3 <0.3 1:1 NS 1 111 1/1 998 <50 <0.3 <0.3 <0.3 <0.3 1:1 NS 03/19/1999 <50 <0.3 <0.3 <0.3 <0.3 1:1 NS I 07/15/1999 <50 <0.3 <0-3 <0.3 <0.3 1:1 NS 11/08/1999 NS NS NS NS NS NS (!. 03/29/2000 NS NS NS NS NS NS 06/28/2000 NS NS I NS NS NS NS i MW-7SBB 02/10/1999 <50 1 <0.3 1 <0.3 1 <0.3 1 <0.3 1:1 NS GCata6-00,xls Page 3 of 7 11/07/2000