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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 /> Purge 06/01/1988 NA <0.5 <0.5 <br /> Purge 03/01/1989 <0.5 <0.5 <0.5 <br /> Purge 03/01/1992 <0.5 <0.5 <0.5 <br /> Purge 01/01/1993 <0.5 <0.5 <0.5 <br /> Purge 01/01/1994 <0.5 <0.5 <0.5 <br /> Purge 07/01/1994 <0.5 <0.5 <0.5 <br /> Purge 03/01/1995 <0.5 1.2 <0.5 <br /> Purge 10/01/1995 <0.5 <0.5 <0.5 <br /> Purge 04/01/1996 <0.5 0.6 <0.5 <br /> Purge 10/01/1996 <0.5 <0.5 <0.5 <br /> Purge 04/01/1997 <0.5 <0.5 <0.5 <br /> Purge 11/01/1997 <0.5 <0.5 <0.5 <br /> Purge 04/30/1998 <0.5 <0.5 <0.5 <br /> Purge 10/06/1998 <0.5 <0.5 <0.5 <br /> Purge 04/06/1999 <0.5 <0.5 <0.5 <br /> Purge 10/11/1999 <0.5 <0.5 <0.5 <br /> Purge 04/18/2000 <0.5 <0.5 <0.5 <br /> Purge 10/11/2000 <0.5 <0.5 <0.5 <br /> Purge 04/10/2001 <2.0 <2.0 <2.0 <br /> Purge 10/10/2001 <0.5 <0.5 <0.5 <br /> Purge 05/08/2002 <0.5 <0.5 <0.5 CM:0.9 <br /> Purge - 10/29/2003 <0.5 <0.5 <0.5 <br /> PDB 32.5 04/20/2005 <0.5 <0.5 <0.5 <br /> PDB 37.5 B 04/20/2005 <0.5 <0.5 <0.5 <br /> PDB - B 04/30/2009 <0.5 <0.5 <0.5 1,1-13CE:0.62 <br /> M-8A Purge 10/01/1987 89 30 100 1,1-13CE:1 <br /> Purge 06/01/1988 100 <5 12 <br /> Purge 03/01/1989 26 3.9 0.7 1,1,1-TCA:1.8 <br /> Purge 03/01/1989 24 3.7 0.7 DUP,1,1,1-TCA:1.7 <br /> Purge 11/01/1989 19 9 <0.5 <br /> Purge 03/01/1990 26 13 <0.5 <br /> Purge 07/01/1990 16 5.9 0.7 <br /> Purge 09/01/1990 57.4 31.3 <0.5 <br /> Purge 12/01/1990 17 27 <0.5 <br /> Purge 12/01/1990 <0.5 <0.5 <0.5 DUP <br /> Purge 04/01/1991 9.7 42 <0.5 <br /> Purge 07/01/1991 6.9 19 39 <br /> Purge 07/01/1991 62 17 78 DUP,t-1,2-DCE:0.8 <br /> Purge 10/01/1991 67 27 67 1,1-DCE:0.7,t-1,2-DCE:0.7 <br /> Purge 03/01/1992 106 28 14 1,1-13CE:1 <br /> Purge 06/01/1992 107 44 102 1,1-DCE:1,t-1,2-DCE:1 <br /> Purge 10/01/1992 106 68 56 1,1-DCE:1.2 <br /> Purge 04/01/1993 105 47 <0.5 1,1-DCE:1.1 <br /> Purge 06/01/1993 116 56 <0.5 <br /> Purge 08/01/1993 68 27 21 1,1-DCE:0.9 <br /> Purge 01/01/1994 139 54 94 1,1-DCE:1.9 <br /> Purge 03/01/1995 53 30 1.6 1,1-13CE:0.5,Iso-benzene:5,Tol:3.8 <br /> Purge 04/01/1996 34 17 30 <br /> Purge 04/01/1997 1.4 72 <0.5 <br /> Purge 04/29/1998 34 13 <0.5 <br /> Purge 04/29/1998 35 14 <0.5 DUP4 <br /> Purge 04/08/1999 55 22 <0.5 t-1,2-DCE:0.5 <br /> Purge 04/08/1999 53 21 <0.5 DUP <br /> Purge 04/12/2000 21 7.8 <0.5 CF:0.5 <br /> Purge 04/12/2001 <2.0 <2.0 <2.0 <br /> Purge 05/09/2002 2 1 <0.5 <br /> Purge 05/02/2003 6.7 2.8 4.1 <br /> Purge - 04/21/2004 3.2 1.4 2.7 <br /> PDB 93.5 04/19/2005 0.77 0.58 <0.5 <br /> PDB 98.5 04/19/2005 0.74 0.53 <0.5 <br /> PDB 103.5 04/19/2005 0.79 0.56 <0.5 <br /> PDB 108.5 04/19/2005 0.71 0.5 <0.5 <br /> PDB 103.5 A 04/18/2006 0.71 <0.5 <0.5 <br /> PDB 103.5 A 04/25/2007 0.84 <0.5 <0.5 <br /> PDB 103.5 A 04/28/2008 0.94 <0.5 <0.5 <br /> Purge 103.5 A 10/21/2008 0.89 0.5 <0.5 <br /> PDB 103.5 A 04/10/2009 <0.5 <0.5 <0.5 <br /> PDB 103.5 A 04/28/2010 <0.50 <0.50 <0.50 <br /> Low-flow purge 103.5 A 08/05/2010 <0.50 <0.50 <0.50 <br /> Page 15 of 93 <br />