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�rt�iAy'bsd <br /> WftW <br /> FQIf ans Memo 78n kRN P�7lk TP�'Y IJYeqa,07P� <br /> 1A17s <br /> . <br /> V0138 ,,,,, w=ar .f <br /> l AUG 2 3 1994 <br /> // ENVIRONMENTAL HEALTH <br /> PERM1T/SERVICES <br /> Working To Restore Nature <br /> 3710 Malin Street <br /> Estaion,CA 95320 <br /> Phone:(209)838-3507 <br /> FAIT:(209)838-3509 <br /> July Z, 1994 <br /> Rs. Beth Thayer <br /> Central Valley Regional Water Quality Control Board <br /> 3443 Routier Road, Suite A <br /> Sacramento, CA 95827-3093 <br /> RE: Mor-Cal Beverage, 1800 E. Fremont St., Stockton, CA <br /> Dear Ms. Thayer, <br /> I am writing to discuss several technical aspects of the <br /> underground tank case at the above mentioned site and to address <br /> comments made, in the January 1, 1994 letter from the ban Joaquin <br /> County Environmental Health Division to Mr. Peter Ruhkala <br /> (attached) . I have spoken to Mr. Steve Sarson of the County and <br /> he suggested these comments be addressed to you since they focus <br /> exclusively on closure Issues. <br /> In the September 22, 1993 letter From Kr_ Braunstein of your office <br /> to Mr. RuMula it was indicated that the San Joaquin County ERD had <br /> requested your concurrence in closure of this site, however, <br /> additional information was needed to consider Closure. <br /> specifically, Mr, Braunstein asked for a survey of water supply <br /> Valls within one mile of the site And an explanation of the method <br /> for determining the groundwater gradient. He also stated concerns <br /> regarding gradient fluctuations at a nearby site (2185 East <br /> Frmmont)_ Mr. Ruhkula then contracted for additional work to <br /> address these concerns. This work is summarized in the December <br /> 20, 1993 letter from RESNA to Ks. Diane Hinson of SJEHD (ropy <br /> attached). The conclusion of this letter is that the hydropunch <br /> sample located north-northwest of the tank site was appropriately <br /> located to evaluate downgradient 'movement of contaminants <br /> associated with the former release. Therefore, closure was again <br /> requested. Although a response has not been received from your <br /> office, SJEHD did respond with two speCiffC concerns as listed <br /> below: <br /> Z. Levels of TESL detected in MW-1 must be Cleaned up to less than <br /> 0.5 ppb in order to he in compliance with SWACB Resolution 192-49. <br /> 2. Although all of the site files in the vicinity of Nor-Cal <br /> Beverage (which were requested of and provided by &7SHb) were <br /> consistent with a northerly gradient at Nor-Cal, a site which was <br /> not provided to RESNA in response to our request and which is in <br /> Close proximity to Nor-Cal has shown a east-southeast gradient. <br /> ��' V6�2-E52 (%6) ((J031IW/QNI HN53a Wd8O:60 b6. 6Z nnu <br />