Laserfiche WebLink
O.'ARN Californiategional Water QualitpControl Board <br /> Central Valley Region �' - <br /> Steven T. Butler,Acting Chair r" <br /> Winston H.Hickox Gray Davis <br /> Secretaryfor Sacramento Main Office "' r Governor <br /> Fm;roa ntal Internet Address: http://www.swrcb.ca.gov/—rwgcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000-DoD FAX(916)255-3052 <br /> 19 March 1999 <br /> Binayak P. Acharya <br /> Nestle USA <br /> 800 North Brand Blvd. <br /> Glendale, CA91203 <br /> WORKPLAN FOR INTERIMREMEDL4L ACTION, NESTLE BEVERAGE COMPANY XfPON <br /> FACILITY), STANISLAUS COUNTY <br /> We have reviewed the Work Plan for Interim Remedial Action(Work Plan), submitted 8 March 1999. <br /> The Work Plan presents proposal for installation of one additional groundwater extraction well and a <br /> new groundwater treatment system (granular activated carbon-GAC) at the Nestle (Ripon) site. The new <br /> extraction well will operate in a area that has groundwater contamination in excess of 100 ppb TCE. <br /> Approximate pumping rates of the extraction well, completed in the B aquifer zone, is 140 gallons per <br /> minute (gpm). Comments presented below summarize our comments on the Work Plan and comments <br /> provided during our last project meeting on 11 March 1999. We have also provided comments which <br /> reference agreements which were reached during the meeting and objectives for the groundwater <br /> remediation at the Nestle site. <br /> Comments <br /> 1. As discussed during the project meeting of 11 March 1999, we request that Nestle provide <br /> several additional groundwater extraction wells in addition to the one proposed extraction well <br /> (E-2) in the Work Plan. We consider this the second phase of groundwater remediation which is <br /> still part of an interim remedy. The scope of the next phase of groundwater remediation will be <br /> dependent on findings from a 6 month potassium permanganate pilot study which will evaluate if <br /> potassium permanganate can allow efficient cleanup of TCE. <br /> 2. It was agreed that the second phase of the groundwater remediation would have the following <br /> three objectives: <br /> a) reduce the TCE mass in groundwater <br /> b) maximize protection of the municipal and domestic supply wells <br /> C) be consistent with the final remedy regardless of if the potassium permanganate treatment <br /> is successful or not and prevent detrimental effects on the 6 month pilot study for <br /> remediation of the TCE plume using potassium permanganate. <br /> California Environmental Protection Agency <br /> �a Recycled Paper <br />