Laserfiche WebLink
California F Aonal Water Quality`jontroi Hoard <br /> Central Valley Region <br /> Terry Tamminen Robert Schneider,Chair <br /> Secretaryfor �I Arnold Schwarzenegger <br /> Environmental Sacramento Main Office Gowrnor <br /> L_.i <br /> Protection Internet Address:http://www.swrcb.ca.gov/rwqcb5 <br /> Sun Center Drive#200 Rancho Cordova,CA 9567cW T 13 2004 <br /> Phone(916)464-3291 •Fax (916)464.4797 <br /> ENVIRONMENT HEALTI I <br /> PERMIT/SERVICES <br /> October 2004 <br /> Mr. Mike Lescisin <br /> Diamond Walnut Growers Inc. <br /> 1050 South Diamond Street <br /> Stockton, California 95201 <br /> MONITORING REPORT,DIAMOND WALNUT GROWERS, STOCKTON PLANT <br /> RELEASE SITE, 1050 SOUTH DIAMOND STREET, STOCKTON, SAN JOAQUIN <br /> COUNTY <br /> Central Valley Regional Water Quality Control Board(Regional Board) staff reviewed the <br /> 13 September 2004 Third Quarter 2004 Monitoring Report(QMR) submitted by ATC <br /> Associates Inc. on behalf of Diamond Walnut Growers Inc. (DWG) for its Stockton Plant. On <br /> 15 June 2004, Regional Board staff was notified by the City of Stockton Municipal Utilities <br /> Department (MUD) that its production well WP-1,which is downgradient of your Stockton <br /> Plant, contains pollution and must be shut down. Regional Board staff then contacted you and <br /> requested that you sample for the contaminants that were identified by the MUD, including <br /> tetrachloroethylene (PCE), trichloroethylene (TCE) and aluminum. The QMR contains the <br /> analytical results for this sampling. During the July 2004 sampling the highest groundwater <br /> pollution concentrations were 3,400 micrograms per liter(µg/1) of hexavalent chromium in <br /> monitoring well MW-3, 51 µg/1 of PCE in MW-9, and 2,300 µg/1 of aluminum in MW-7. TCE <br /> was not detected and had a reporting limit of 0.5 µg/1. DWG should continue to monitor for <br /> these additional pollutants. Therefore, a draft revised Monitoring and Reporting Plan(MRP)is <br /> enclosed for your review. <br /> In addition, DWG submitted plans to San Joaquin County to destroy facility well FW. The QMR <br /> should contain updates for the planned destruction of FW. Regional Board staff also determined <br /> that monitoring well MW-1 contains no groundwater pollution, is sidegradient of the pollutant <br /> plume and is not necessary to the monitoring and reporting protocol for the clean up. DWG may <br /> proceed to arrange with San Joaquin County for the permitted destruction of MW-1. <br /> By 19 November 2004,please submit comments on the draft revised MRP. If you have any <br /> questions, you may contact me at (916) 464-4682 or by email at serram(arb5s.swrcb.ca.eov. <br /> �ERRA <br /> Private Sites Cleanup Unit <br /> cc list see next page <br /> California Environmental Protection Agency <br /> (3 Recycled Paper <br />