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' w <br /> Mr. Mike Desso . - 3 - • 4 December 2006 <br /> Nestle's Draft Report), recommends a detection limit of 10 micro grams per liter, which is <br /> equivalent to approximately 2 ppmv. <br /> Comments on the Work Plan <br /> Regional Water Board staff has the following comments on the Work Plan presented in Appendix <br /> A of the Draft Report. <br /> 11.The text of the first paragraph of Section 2.3.4 of the Work Plan is confusing. It seems to <br /> indicate that only one air sample will be collected per building. This contradicts the information <br /> provided in the Table on pages 3 and 4, and in Figure 2 of the Work Plan. Please clarify the <br /> text to indicate that more than one air sample will be collected from each building. <br /> 12.The Work Plan indicates that the indoor air sampling will occur during early autumn. The Work <br /> Plan should be revised to indicate that the sampling will occur when weather and soil moisture <br /> conditions are favorable. <br /> 13. Provided that Nestle adheres to the recommendations, and the methods and procedures of the <br /> guidance documents named in the Reference Section of the Draft Report, the Work Plan <br /> should be implemented. <br /> The final Report and Work Plan should be submitted to the Regional Water Board by 8 January <br /> 2007. In addition, to address the Regional Water Board staff General Comments above, Nestle <br /> should submit a work plan by 9 February 2007 to complete characterization of the TCE in soil <br /> vapor. If you have any questions, please contact me at (916) 464-4675, or by email at <br /> jbrownell@waterboards.ca.gov. <br /> I &r..� R <br /> r� <br /> ames R. Brownell, P.G. <br /> Associate Engineering Geologist <br /> cc: Ms. Margaret Lagorio City of Ripon <br /> San Joaquin County Public Health Building Department <br /> Environmental Health Division 1210 Vera Avenue <br /> 304 East Weber Avenue, Third Floor Ripon, California 95366 <br /> Stockton, California 95202 <br /> Mr. Jerry Jenkins Mr. Binayak Acharya <br /> Ripon Milling Company Environmental Cost Management, Inc. <br /> 320 S. Stockton Avenue 660 Baker Street, Suite 253 <br /> Ripon, CA 95356 Costa Mesa, California 92626 <br /> Ms. Noelia Marti-Colon Mr. Tom Hindman <br /> Nestle USA Ripon Public Library <br /> 800 North Brand Boulevard 430 West Main Street <br /> Glendale, California 91203 Ripon, California 95366 <br />