Laserfiche WebLink
Nwe <br /> WATERW ARKK <br /> GEOCHEMICAL•GEOTECHNICAL•ENVIRONMENTAL <br /> C(OPY <br /> October 10, 1990 <br /> Mr. Robert Evans <br /> CA Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road <br /> Sacramento, CA 95827-3098 <br /> Re: Addition to waste discharge requirements, Tri Valley <br /> Growers, Plant T, 26200 Nowell Road, Thornton, CA <br /> Dear Robert: <br /> As per your request, I am writing to provide additional <br /> information on the proposed groundwater treatment and disposal <br /> system at the above referenced site. <br /> We anticipate a pumping rate or 1 gpm from the proposed pumping <br /> well (MW-4) . The water will be treated by two-200 pound carbon <br /> canisters plumbed in series and pumped to a storm drain on site <br /> (see attached Figure) . The first carbon canister should remove <br /> all the hydrocarbons, while the second canister will ensure that <br /> the effluent is below method detection limits. When the first <br /> canister cannot absorb anymore hydrocarbons, it will be removed <br /> and the number two canister moved into its place. A new canister <br /> will be added to ensure clean effluent. We anticipate that the <br /> lead canister will last approximately 2 1/2 months at the present <br /> concentrations of hydrocarbons in well 4 and 1 gpm pumping rate. <br /> I have enclosed the lab results and the calculations from the <br /> carbon company for your information.. <br /> During removal of the underground tank all soil contamination <br /> detected was removed and aerated on-site. No underground tanks <br /> still exist in the area of this investigation. <br /> We are presently awaiting approval from San Joaquin County to go <br /> ahead with the proposed remediation system. We will begin <br /> installation as soon as the approval is received and should be <br /> completed in two weeks. The system would be started as soon as <br /> approval to discharge is received from your office. We estimate <br /> operation of the system will last two years. <br /> 1710 MAIN STREET • ESCALOR CA 95320 • (209) 838-3507 <br /> FRESNO,CA(209) 222-3495 0 RENO, NV(702) 7W6830 <br />