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m m m w m m = Ta r ■r M 'Mm m r m m Historic Groundwater Sample Analytical Results-Benzene Earthgrains Baking Companies, Inc 2651 South Airport Way Stockton, California 95206 Date Sample ID 1 Concentradh in I MW-1 MW-2 MW-3 MW-4 MW-5 MW-6 MW-7 MW-8 MW-9 MW-10 MW-11 MW-12 MW-13 SPA SP-2 PZ-1 PZ-2 7/10/1987 6,800 ND(O 5 ND(O 5 - ' 4/26/1988 2,300 NS NS 19 ND(O 5 - - 3/19/1990 5,120 ND(O 5 ND(O 5 ND(O 5)_ ND(O 5 ND(O 5 558 12/20/1990 7,100 ND(O 5 ND(O 5 NS NS ND(O 5 NS ND(O 5 4/9/1992 1,620 8 ND(O 5 NS NS ND(O 5 NS ND(O 5 - - 8/19/1992 4,720 NS NS NS NS NS NS ND(O 5 - - 12/23/1992 2,650 NS NS NS NS NS NS ND 0 5 - - 4/7/1993 2,300 NS NS NS NS ND(O 5 NS NO(O 5 - 7/30/1993 1,900 NS ND(O 5 NS NS ND(O 5 NS NO(O 5 - - 10/21/1993 2,200 NS NS NS NS ND(O 5 NS ND(O 5 - 12/29/1993 1,700 NS NS NS NS ND 05 NS ND 05 - 3/23/1994 2,000 ND(O 5 ND(O 5 230 NS ND(O 5 NS ND(O 5 ND(O 5 17 ND(O 5 ND(O 5 99 6/7/1994 1 500 046 ND(O 5 210 NS ND(O 5 NS ND(O 5 ND(O 5 43 052 045 150 - - 9/8/1994 1,500 21 ND(O 5 180 NS ND(O 5 NS ND(O 5 052 92 ND(O 5 ND(O 5 160 - 2/12/1996 2,400 ND(O 5 ND(O 5 75 NS ND(O 5 NS NS ND(O 5 ND(O 5 ND(O 5 31 49 - 5/14/1996 960 ND(O 5 ND(O 5 66 NS ND(O 5 NS NS ND(O 5 12 ND(O 5 74 65 9/18/1996 890 ND(O 5 ND 0 5 ND(O 5 ND(O y ND(O 5 ND(O 5 ND(O 5 NS 55 NS NS 21 12/18/1996 780 ND(O 5 ND(O 5 54 ND(O 5 ND(O 5 ND(O 5 ND(O 5 ND(O 5 ND(O 5 ND(O 5 16 ND(O 5 7/15/1997 820 ND(O 5 ND(O 5 ND(O 5 ND(O 5 ND(O 5 25 ND(O 5 ND(O 5 14 ND(O 5 85 ND(O 5 10/23/1997 500 ND(O 5 ND(O 5 ND(O 5 ND(O 5 NS 16 ND(O 5 NS 066 ND(O 5 32 ND(O 5 - 1/29/1998 950 NS NS NS NS NS ND(5 O ND(5 0 NS ND(5 0 NS 17 ND(5 0 5/21/1998 620 NS NS NS ND(1 0 NS ND(i 0 ND(I 0 NS NS ND(l 0 26 NS - - 10/28/1998 170 ND(O 5 NS 11 ND(O 5 NS ND(O 5 ND(O 5 NS 10 ND(O 5 11 ND(O 5 - - 5/28/1999 240 ND05 ND05 ND05 ND05 NDO5 ND05 NDOS NDOS 28 ND05 18 NDO5 - - 8/18/1999 630 NS NS 13 NS NS NS NS 12 15 NS 57 11 3,300 NS 3,700 230 11/8/1999 1,400 NS NS ND(O 5 NS NS NS NS ND(O 5 ND(O 5 NS 14 ND(O 5 2,800 24 190 18 3/13/2000 280 NS NS 19 NS NS NS NS ND(O 5 23 NS 59 ND(O 5 1,400 39 190 31 7/2/2000 1,200 NS NS 70 NS NS NS NS 46 91 NS 26 62 1,900 25 230 60 10/19/2000 560 NS NS ND 1 0 NS NS NS NS ND(O 5 ND(O 5 NS 57 ND(O 5 2,000 33 4,600 81 1/18/2001 840 NS NS NO(O 5 NS NS NS NS ND(O 5 ND(O 5 NS 53 ND(O 5 1,900 ND(O 5 620 14 4/19/2001 950 NS NS ND(O 5 NS NS NS NS ND(O 5 ND(O 5 NS 22 ND(O 5 1,500 35 650 200 7/19/2001 970 NS NS ND(O 5 NS NS NS NS ND(O 5 ND(O 5 NS 18 ND(O 5 2,000 11 3,700 35 10/24/2001 190 NS NS ND(O 5 NS NS NS NS ND(O 5 ND(O 5 NS 17 ND(O 5 2,100 68 5100 140 1/24/2002 910 NS NS 096 NS NS NS NS ND(O 5 ND(O 5 NS 14 ND(O 5 2,100 710 3 800 ND 50 4/26/2002 18 NS NS ND(O 5 NS NS NS NS ND(O 5 ND 0 5 NS ND(O 5 ND(O 5 620 ND(O 5 370 ND(2 0 8/1/2002 29 NS NS ND(O 5 NS NS NS NS ND(O 5 ND(O 5 NS ND(O 5 ND(O 5 670 35 280 48 11/5/2002 ND(O 5 NS NS ND(O 5 NS NS NS NS ND(O 5 ND(O 5 NS ND(O 5 ND(O 5 490 12 ND(O 5 NO(O 5 2/5/2003 67 ND05 NDOS ND05 ND05 ND05 13 NDO5 NDO5 ND05 ND05 ND05 ND05 490 ND50 75 ND50 6/24/2004 31 1 ND05 NDO5 ND05 NQO5 NDOS ND05 ND05 NDOS ND05 21 NQ05 ND05 920 ND25 2,200 N0100 IOR12004 180 NS NS NS U(OO NS 32 ND(O 5 NS ND(O 5 23 19 NS 1,700 ND(2 5 1,800 110 1/31/2005 180 NS NS NS ND(O NS 32 ND(O 5 NS ND(O 5 45 ND(O 5 NS 1,500 ND(2 5 1,700 110 4/25/2005 27 NS NS NS NS 28 ND(O 5 NS I ND(O 5 ND(O 5 ND O 5 NS 920 NDJ2 5 2,200 ND 100 Notes pg/L Results reported In micrograms per liter ND-Not detected at or above the laboratory detection limit shown in parentheses NS Not sampled ENV 1 62400132 t 121382eg/Investigation and Quarterty Reports/Table 5 Histonc Benzene Results(2005_Q2)XLS 1 Benzene Values Page 1 of 4 I