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C� <br /> PUBLIC HEALTH SEIVICES <br /> SAN JOAQUIN COUNTY 2' <br /> JOGI KHANNA M.D.,M.P.H. <br /> Health Officer <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) •Stockton, California 95201 c4 F o Re'�P <br /> (209)468-3400 <br /> CHUCK CARMEL <br /> ARCO PRODUCTS COMPANY CC, ` <br /> P O BOX 5811 �" <br /> MAY 2 7 1992 <br /> SAN MATEO CA 94402 <br /> RE: Village ARCO #2133 SITE CODE: 1021 <br /> 2908 West Benjamin Holt <br /> Stockton CA 95207 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has completed <br /> review of the "Addendum to the draft Final Remediation Plan" dated April 29, 1992 and prepared by <br /> Brown and Caldwell. PHS/EHD has the following response for your consideration. <br /> PHS/EHD agrees that the contaminated soil requires remediation and that vapor extraction is an effective <br /> method of remediation. Please initiate application to San Joaquin Valley Unified Air Pollution Control <br /> District, San Joaquin County Zone (APCD) and the City of Stockton Building Department (COS) for <br /> permits to construct. <br /> The addendum proposed five vapor extraction wells to be connected to a catalytic oxidizer. The locations <br /> of these wells are concentrated primarily in the eastern portion of the site. After construction, a test <br /> period will be necessary to determine whether the zone of influence of these wells will be adequate to <br /> remediate soil contamination of the site. It may be necessary to install additional vapor extraction wells to <br /> capture documented soil contamination associated with soil borings, AS-3, AS-4, and AS-7, performed in <br /> 1987. <br /> Furthermore, since the boundaries of soil contamination have never been established, additional soil <br /> investigation is required to define the limits of soil contamination. While awaiting APCD and COS <br /> permits, please submit a work plan for the additional soil investigation defining soil contamination <br /> by July 1, 1992. <br /> Please continue attempts to submit quarterly reports in a timely manner. Quarterly reports should be <br /> submitted within 60 days of the date of sampling. <br /> If you have any questions or to discuss the contents of this letter please contact Mary Meays, REHS, of my <br /> staff at (209) 468-0337. <br /> Jog' Khann ., M.P.H. <br /> Health rcer� <br /> i <br /> 1011 <br /> I <br /> ie A. Cotulla, R HS, Program anager <br /> ronmental Health Division <br /> /MM:lb <br /> Elizabeth Thayer, CVRWQCB c: Steve Misner, Brown and Caldwell <br /> c: Chris Windsor, ARCO c: Frank Tucker, COS <br /> A Division of Sun Joaquin Counry Hcalth Carc Serv+ces \ 1 <br />