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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 03/01/1990 <0.5 <0.5 <0.5 <br /> Purge 07/01/1990 <0.5 <0.5 <0.5 <br /> Purge 09/01/1990 <0.5 <0.5 <0.5 <br /> Purge 12/01/1990 <0.5 <0.5 <0.5 <br /> Purge 04/01/1991 <0.5 <0.5 <0.5 <br /> Purge 07/01/1991 <0.5 <0.5 <0.5 <br /> Purge 10/01/1991 <0.5 <0.5 <0.5 To1:4.4 <br /> Purge 03/01/1992 <0.5 <0.5 <0.5 <br /> Purge 06/01/1992 <0.5 <0.5 <0.5 <br /> Purge 10/01/1992 <0.5 <0.5 <0.5 <br /> Purge 01/01/1993 <0.5 <0.5 <0.5 <br /> Purge 04/01/1993 <0.5 <0.5 <0.5 <br /> Purge 08/01/1993 <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 <0.5 <0.5 Iso-benzene:2.6,Tol:0.9 <br /> Purge 10/01/1995 <0.5 1 <0.5 <br /> Purge 04/01/1996 <0.5 <0.5 <0.5 <br /> Purge 10/01/1996 <0.5 0.9 <0.5 <br /> Purge 04/01/1997 <0.5 <0.5 <0.5 MC:1.7 <br /> Purge 04/01/1997 <0.5 <0.5 <0.5 DUP,MC:0.6 <br /> Purge 11/01/1997 <0.5 <0.5 <0.5 <br /> Purge 05/01/1998 <0.5 <0.5 <0.5 <br /> Purge 10/07/1998 <0.5 <0.5 <0.5 <br /> Purge 04/08/1999 <0.5 <0.5 <0.5 <br /> Purge 10/07/1999 <0.5 <0.5 <0.5 <br /> Purge 04/13/2000 <0.5 <0.5 <0.5 <br /> Purge 10/10/2000 <0.5 <0.5 <0.5 <br /> Purge 04/11/2001 <2.0 <2.0 <2.0 <br /> Purge 10/11/2001 <0.5 <0.5 <0.5 <br /> Purge 05/07/2002 <0.5 <0.5 <0.5 <br /> Purge 10/09/2002 <0.5 <0.5 <0.5 <br /> Purge 05/06/2003 <0.5 <0.5 <0.5 <br /> Purge 10/27/2003 <0.5 <0.5 <0.5 <br /> Purge 04/15/2004 <0.5 <0.5 <0.5 <br /> Purge - 10/12/2004 <0.5 <0.5 <0.5 <br /> PDB 122.5 04/21/2005 <0.5 <0.5 <0.5 <br /> PDB 122.5 04/21/2005 <0.5 <0.5 <0.5 DUP <br /> PDB 127.5 10/28/2005 <0.5 <0.5 <0.5 Sample depth is 127.5,not 169.5 ft bgs. <br /> PDB 122.5 04/19/2006 <0.5 <0.5 <0.5 <br /> PDB 122.5 SA 10/17/2006 <0.5 <0.5 <0.5 <br /> PDB 127.5 SA 04/25/2007 <0.5 <0.5 <0.5 <br /> PDB 127.5 SA 10/10/2007 <0.5 <0.5 <0.5 <br /> PDB 127.5 SA 04/24/2008 1.1 0.63 <0.5 <br /> PDB 127.5 SA 11/05/2008 2.3 1.4 <0.5 <br /> PDB 127.5 SA 04/10/2009 1.3 0.84 <0.5 <br /> PDB 127.5 SA 10/26/2009 1.9 1.2 <0.5 <br /> PDB 127.5 SA/A 04/19/2010 1.9 1.3 <0.50 Went to annual May 2010 per MRP <br /> M-16A Purge - 11/01/1989 <0.5 <0.5 <0.5 <br /> Purge 03/01/1990 <0.5 <0.5 <0.5 <br /> Purge 07/01/1990 <0.5 <0.5 <0.5 <br /> Purge 09/01/1990 <0.5 <0.5 <0.5 <br /> Purge 12/01/1990 <0.5 <0.5 <0.5 <br /> Purge 04/01/1991 <0.5 <0.5 <0.5 <br /> Purge 07/01/1991 <0.5 <0.5 <0.5 <br /> Purge 10/01/1991 <0.5 <0.5 <0.5 Tol: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 2.8 <0.5 <br /> Purge 07/01/1994 <0.5 <0.5 <0.5 <br /> Purge 03/01/1995 <0.5 <0.5 <0.5 <br /> Purge 04/01/1996 <0.5 <0.5 <0.5 <br /> Purge 10/01/1996 <0.5 <0.5 <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 04/01/1997 <0.5 <0.5 <0.5 DUP <br /> Purge 11/01/1997 1.8 0.5 <0.5 <br /> Purge 04/30/1998 <0.5 <0.5 <0.5 <br /> Purge 10/07/1998 <0.5 <0.5 <0.5 <br /> Page 40 of 93 <br />