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L � w RECEIVE® �f <br /> EuMUNu G. BHu-JH. <br /> ti. '^ GOVERNOR <br /> OCT2 3 2013 1 MLRrrmcw ETARY ORDRIOUEZ <br /> CA LI IORNIA <br /> Water Boards ENVIRONMENTAL PROTECTION <br /> ENVIRONMENTAL HEALTH <br /> Central Valley Regional Water Quality Control Board <br /> 21 October 2013 <br /> Leon Marineau Christian L'Orange <br /> Cascades Inc. Drinker Biddle & Reath LLP <br /> 471 Marie-Victorin 50 Fremont Street <br /> Kingsey Falls, Quebec, Canada JOA 180 San Francisco, CA 94105 <br /> DOPACO, INC., 800 WEST CHURCH STREET, STOCKTON, <br /> SAN JOAQUIN COUNTY, REGIONAL BOARD CASE 391187 <br /> California Regional Water Quality Control Board, Central Valley Region (Central Valley Water Board) <br /> staff reviewed the following documents: <br /> July-August 2013 Additional Investigation Report(Report) and <br /> Soil Excavation Plan (Work Plan) <br /> Both documents were received 2 October 2013, submitted by Geosyntec Consultants (GC) for <br /> Cascades, Inc. for the Dopaco, Inc. (Case 1). In the Report GC proposes onsite and offsite soil, soil gas, <br /> and groundwater sampling. In the Work Plan GC proposes excavation of soil impacted by toluene to the <br /> proposed cleanup goal of 2.9 milligrams per kilogram, based on the San Francisco Bay Regional Water <br /> Quality Control Board Environmental Screening Level. We are aware Dopaco has been ordered to <br /> conduct investigation and cleanup of toluene, and any chemicals commingled with toluene, from the <br /> property at 800 West Church Street in Stockton by agreements specified in the Stipulated Injunction and <br /> Consent Decree per United States District Court, Eastern District of California Case 2:08-cv-02623-GEB- <br /> DAD, dated 20 April 2012. <br /> We concur with the activities proposed by GC in the Work Plan with the following additions: <br /> 1. A 30-day Public comment period must be conducted prior to implementation of a corrective <br /> action. At a minimum a Fact Sheet describing the corrective action needs to be prepared and be <br /> mailed to all properties (residential and commercial) adjacent to the Site and posted in the office <br /> and lunch area on the property prior to fieldwork. All comments must be addressed prior to start <br /> of work. An example Fact Sheet is attached and an electronic copy was mailed to Dr. Tony <br /> Smith of GC on 16 October 2013. We can work with Dr. Smith through email to provide edits <br /> and final approval of the Fact Sheet and distribution list. <br /> 2. Submission of a map showing the proposed route for the dump trucks with designated hours of <br /> operations for traffic control and the total anticipated number of trips to/from the work area per <br /> day in a Work Plan Addendum. <br /> 3. Submission of an updated Health and Safety Plan addressing activities associated with the <br /> excavation in a Work Plan Addendum. <br /> 4. Submission of a dewatering plan describing the treatment and disposal of toluene-impacted <br /> groundwater in a Work Plan Addendum. <br /> KAnL E. LONcLEY ScD, P.E., CHAIR I PAMELA C. CREEOON P.E., 8CEE, rXCOUTivr orncrn <br /> 11020 Sun Center Drive 0200,Rancho Cordova,CA 95670 I www.waterboards.ca.gov/centralval ley <br /> 10 RECYCLED PAPER <br />