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t Com" <br /> PUBLIC hEALTH SERV*fCES <br /> Pqur� <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION q <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer <br /> 304 E. Weber Ave., Third Floor • P. O. Box 388 • Stockton, CA 952lelo <br /> . .Ra�P . <br /> 2091468-3420 <br /> FRANK YONESHIGE MAILED FEB 0 61996 <br /> VAN DEN BERGH FOODS INC <br /> P O BOX 9200 <br /> STOCKTON CA 95208 <br /> RE-. Ragu Foods SITE CODE: 22073 <br /> 1400 Waterloo Road <br /> Stockton CA 95205 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has <br /> completed review of your November 15, 1995 correspondence and the 'Verification Soil <br /> Boring Report" dated December 1, 1995 and prepared by IT Corporation. PHSIEHD has the <br /> following comments for your consideration. <br /> You requested permission to immediately implement interim corrective action to mitigate <br /> further groundwater contamination using the "Oxygen Release Compound" product in the <br /> saturated zone of existing monitoring wells. PHSIEHD agrees that immediate interim <br /> corrective activities will minimize further contamination; however, according to the MSDS <br /> which was included, the material proposed for use would result in a hazardous waste. <br /> PHSIEHD is not opposed to pilot testing of innovative remedial methods and has scheduled a <br /> meeting with a product representative. PHSIEHD hopes that sufficient information will be <br /> presented to demonstrate not only the product's effectiveness but its safety as well. <br /> Two soil borings were drilled and sampled on August 21, 1995 to better determine the extent <br /> of residual soil contamination, so that the potential threat which the residual soil <br /> contamination may pose to groundwater can be evaluated. Soil samples were also collected <br /> to evaluate the subsurface environment to determine if biological activity could present a <br /> viable remedial alternative. <br /> Soil contamination was evidenced in samples collected from SB1 predominately at 15 and 64 <br /> feet indicating that there is both a horizontal and vertical component in the site specific <br /> migration pattern observed. <br /> The results of the geochemica l/biological activity testing suggested that bioremediation could <br /> be an effective alternative, if the microbial population already present is enhanced through <br /> the introduction of nutrients and oxygen. <br /> The next level of site evaluation consists of the preparation of a corrective action plan <br /> pursuant to Califomia Code of Regulations Title 23, Chapter 16, Article 11. A function of <br /> corrective action plan preparation is analysis to determine the potential threat which the <br /> residual soil contamination may pose to groundwater. Should the potential groundwater <br /> impact not significantly exceed regulatory levels, long term groundwater monitoring may be <br /> used for environmental fate verification. <br /> A Division of San Joaquin County Health Care Services <br />