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Appendix B: Historical Analytical Results for Volatile Organic Compounds <br /> 2010 Annual Report <br /> Former Nestle USA, Inc. Facility, Ripon, CA <br /> USEPA Method 8010,8021,8260 or 524 in micrograms per liter(ppb) <br /> Well Name/ Sampling Method Average PDB Current <br /> Location (Purge/PDB) Depth(ft bgs) Sampling Sample Date cis-1,2-DCE TCE VC Comments/Other Detected VOC's <br /> Fre uenc <br /> 103.5 M 11/23/2010 <0.50 <0.50 <0.50 <br /> 103.5 M 12/21/2010 <0.50 <0.50 <0.50 <br /> M-86 Purge - 10/01/1987 <5 360 <5 <br /> Purge 06/01/1988 NA 300 <0.5 <br /> Purge 03/01/1989 <50 900 <50 <br /> Purge 11/01/1989 <50 1300 <50 <br /> Purge 03/01/1990 <50 1300 <50 <br /> Purge 07/01/1990 <0.5 790 <0.5 <br /> Purge 07/01/1990 <0.5 900 <0.5 DUP <br /> Purge 09/01/1990 10.2 1365 <0.5 <br /> Purge 09/01/1990 9.1 1293 <0.5 DUP <br /> Purge 12/01/1990 2 748 <0.5 <br /> Purge 04/01/1991 19 1400 <0.5 <br /> Purge 07/01/1991 19 83 <0.5 CF:0.9 <br /> Purge 10/01/1991 36 1060 <0.5 Tol:4.7;CF:2.7 <br /> Purge 03/01/1992 19 618 <0.5 CF:0.8 <br /> Purge 06/01/1992 18 900 <0.5 CF:1.3 <br /> Purge 10/01/1992 22 1000 <0.5 CF:2.3 <br /> Purge 10/01/1992 22 1030 <0.5 DUP;CF:2.8 <br /> Purge 01/01/1993 31 580 <0.5 CF:1.9 <br /> Purge 04/01/1993 25 800 <0.5 CF:2.2 <br /> Purge 08/01/1993 8.9 400 <0.5 CF:1.3 <br /> Purge 01/01/1994 9.9 420 <0.5 MC:0.5;CF:1.3 <br /> Purge 05/01/1994 23 780 <0.5 MC:4.2;CF:1.6 <br /> Purge 03/01/1995 37 700 <0.5 CF:1.3 <br /> Purge 04/01/1996 4.1 82 <0.5 <br /> Purge 04/01/1997 3.2 750 <0.5 <br /> Purge 07/01/1997 6 160 <0.5 MC:0.9 <br /> Purge 07/01/1997 4.3 <50 <0.5 DUP <br /> Purge 04/29/1998 4 170 <0.5 1,1,1-TCA:0.7; 1,2-DCP:17;CF:0.5 <br /> Purge 04/29/1998 7.3 180 <0.5 DUP3;CF:0.7 <br /> Purge 04/06/1999 5.2 180 <0.5 <br /> Purge 04/18/2000 7.4 230 <0.5 CF:0.8 <br /> Purge 04/12/2001 <2.0 85 <2.0 <br /> Purge 05/09/2002 5.6 110 <0.5 <br /> Purge 05/02/2003 4 89 <0.5 <br /> Purge 04/22/2004 2.9 100 <0.5 <br /> Purge - 04/22/2004 2.7 110 <0.5 DUP <br /> PDB 28.5 04/19/2005 <0.5 15 <0.5 <br /> PDB 33.5 04/19/2005 <0.5 30 <0.5 <br /> PDB 38.5 04/19/2005 0.73 58 <0.5 <br /> Purge - 05/10/2005 1 74 <0.5 <br /> PDB 38.5 A 04/18/2006 <0.5 35 <0.5 <br /> PDB 38.5 A 04/25/2007 <0.5 14 <0.5 <br /> PDB 38.5 A 04/28/2008 <0.5 6.9 <0.5 <br /> PDB 38.5 A 04/10/2009 <0.5 17 <0.5 <br /> PDB 38.5 A 04/28/2010 <0.50 7.3 <0.50 <br /> Low-flow purge 38.5 A 08/05/2010 <0.50 8.2 <0.50 <br /> PDB 38.5 M 04/28/2010 <0.50 9.7 <0.50 <br /> PDB 38.5 M 04/28/2010 <0.50 4.5 <0.50 <br /> M-9A Purge - 10/01/1987 6.5 5.3 <0.5 <br /> Purge 06/01/1988 NA <5 <5 1,1,1-TCA:69 <br /> Purge 03/01/1989 59 25 <5 <br /> Purge 11/01/1989 73 38 <0.5 <br /> Purge 03/01/1990 48 26 <0.5 <br /> Purge 07/01/1990 30 12 <0.5 <br /> Purge 09/01/1990 19.6 8.7 <0.5 <br /> Purge 12/01/1990 13.7 6.2 <0.5 <br /> Purge 04/01/1991 110 47 <0.5 <br /> Purge 07/01/1991 92 30 5.9 1,1-DCE:1 <br /> Purge 10/01/1991 98 46 7.3 1,1-DCE:1.5;CF:3.1 <br /> Purge 03/01/1992 0.5 34 <0.5 <br /> Purge 06/01/1992 80 36 3.3 <br /> Purge 10/01/1992 72 13 <0.5 <br /> Purge 01/01/1993 32 37 <0.5 <br /> Purge 04/01/1993 65 48 <0.5 1,1-DCE:1 <br /> Purge 08/01/1993 89 15 <0.5 <br /> Purge 01/01/1994 33 17 <0.5 <br /> Purge 03/01/1995 41 26 <0.5 Iso-benzene:1.4,Tol:0.7 <br /> Page 16 of 93 <br />