SITE INFORMATION AND CORRESPONDENCE

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04/08/99 THU 15:12 FAX GROUNDWATER 19004 Since submittal of the Feasibility extraction and treatment, soil selected and implemented Study in 1994, Nestle has vapor extraction was (planned for mid 2000), Nestle continued groundwater implemented to address TCE in will continue interim groundwater monitoring and sampling and four source areas. Since TCE is extraction and treatment. interim remedial actions in a volatile chemical, it can be accordance with the C&A Order. "stripped" from the soil by In addition, Nestle plans to Install inducing air flow through the soil additional groundwater extraction Nes0e has undertaken several using a series of shallow wells. wells as appropriate to remove actions to address the presence Soil vapor extraction has been more TCE which will ultimately of TCE in the soil and effective in removing TCE from reduce groundwater impacts. groundwater, and to investigate soil and has significantly One such well, is currently the potential applicability of eliminated potential sources of planned near a former sewer line technologies to groundwater and further groundwater impact. leak along Stockton Avenue soil cleanup. These initial southwest of the former plant cleanup actions are called Remedial actions taken to date and will be placed on line in the interim remedial actions and are have been successful in Spring of 1999. This location is discussed below. removing significant amounts of ne of the sites where soil vapor TCE from the soil and is bell xtraction was performed (see Groundwater to be complete. D rgure 1). In 1986, a granular activated IR carbon (GAC)treatment system was installed to treat the FUTURE PLANS production water from tie main COMMUNITY CONTACTS plant well, which was used for Nestle is continuing to evaluate manufacturing.Activated carbon final cleanup actions for the site. Salifomia Regional Water treatment i5 a commonly used A Final Feasibility Study Quality Control Board technology to remove impurities Addendum is planned for 3141 Routier Road, Suite A; in water including organic submittal to the Regional Board Sacramento, CA 95827 chemical solvents like TCE. in the Fall of 1999. Furthermore, Robert Reeves, Project Nestle is actively pursuing Manager(916)255-3050; In July 1995, the Nestle innovative technologies that may email: reevesr@rbSs.swrcb. production well was abandoned speed up the cleanup of the site, ca.gov along with all the Nestle and a pilot study is scheduled for production wells and was the Summer of 1999. This pilot San Joaquin Countv Public replaced by another well study will evaluate the potential Health Services designed to continue removal of to destroy TCE In the 104 E.Weber Ave.,Third TCE from the groundwater in the groundwater. Floor;Stockton,CA 95202 vicinity of the plant. The existing Carol Oz, Health Specialist carbon treatment system has Depending on the results of the (209)488-3440 been treating between 120 and pilot study, final cleanup plans 140 gallons per minute (gpm)of will be developed and the public 12eeartment of Health impacted groundwater since will be given opportunity for Services 1986. The plant has since review and comment. ceased operations; however, Nestle continues to pump the Ultimately,cleanup levels for the most impacted groundwater and groundwater will be based on operate the treatment system, in beneficial uses of groundwater Modesto,CA ordertocontinue removal ofTCE (i.e., domestic, municipal, from groundwater in the former industrial and agricultural uses) Nestie USA plant area, and protection of human health 800 North Brand Blvd.; and the environment. Glendale,CA 91203 Soils Binayak Acharya, Project In addition to groundwater Until final cleanup actions are Manager