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IJEEON <br /> srutiniti.i�c. Jason_M._Costello <br /> HLUf f , N Hd_S/Regulatory Compliance Manager <br /> April 29,2008 �jg 0 5 2018 CAD982468183 <br /> ENVIRONMENT HL-ALTH <br /> PERMITISE"MC"_-S <br /> Attention: Mr. Ray Von Flue <br /> San Joaquin County Environmental Health Department <br /> 600 East Main Street <br /> Stockton,California 95202 <br /> RE: Site Specific TTU CUPA Notification Attachment B - "Certification specifying that local <br /> agencies that have been notified of the operation." <br /> Dear Mr. Von Flue: <br /> DECON Environmental Services, Inc_ (DECON) intends to perform Temporary Treatment Unit (TTU) <br /> operations for JR. Simplot(the Client) located at 16777 Howland Road, Lathrop, California. Specifically, <br /> DECON would like to perform pH neutralization of approximately 480 cubic yards of sulfuric acid <br /> contaminated pea gravel removed from the structural base of sulfuric acid tank located at our Client's site. <br /> DECON would like to begin treatment operations immediately following the approval of the submitted <br /> TTU Site Specific Notification(DTSC Form 1]97). <br /> The following is a brief description of TTU operations to be performed by DECON at the project site: <br /> RECON will use two guzzlers to remove the pea gravel from inside of the tank and transfer to the TTU <br /> operations area. The TTU system shall consist of two 21'x8'x5' de-watering bins staged on two separate <br /> 50'xl2'xi' SpillguardrM nylon reinforced, polyurethane secondary containment systems each with the <br /> capability to hold approximately 4,488 gallons. This more than exceeds 110% of the aggregate volume of <br /> rinse water anticipated to pass through each de-watering bin at any given time (est. < 2,000 G). <br /> Spillguard m secondary containment systems will be provided by Rain for Rent. <br /> DECON will stage a 4,900 gallon double-contained poly tank adjacent to de-watering bins. This tank will <br /> be used for making up a caustic aqueous wash solution. The drain port of the tank will be connected to the <br /> inlets to the two de-watering bins using hoses with an in-line double diaphragm pump. DECON will also <br /> connect air hoses from Simplot's Plant air to the two double diaphragm pumps and an air sparge mixer in <br /> the tank(see attached TTU System Diag,-arn). <br /> The 4,900 gallon secondary containment tank system provides for double containment of liquid material <br /> with the primary tank completely enclosed in another tank exceeding 110% of the primary tank's holding <br /> capacity. The tank system is constructed of high density, chemical resistant cross-linked polyethylene with <br /> rain tight top. The 4,900 gallon double contained polyethylene tank system will be provided by Rain for <br /> Rent. <br /> DECON will batch treat 32 to 40 cubic yards of contaminated pea gravel at a time(16 to 20 cubic yards per <br /> de-watering bin) under an approved TTU PBR notification (DTSC Form 1197). During batch treatment, <br /> the pH of the rinse water will be field-tested using pH paper. When the pH is between 5 and 10 the rinse <br /> water will be discharge from the de-watering bins. <br /> 23490 Connecticut Street, Hayward, California 94545—TEL: 510.732.6444 FAX: 510.782.8584 <br />