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6Lcon EneRGY <br /> ASSOCIATES <br /> 4'0'01' IN PARTNERSHIP WITH THE ENVIRONMENT <br /> 23 October , 1990 <br /> 1 <br /> t Clete Roth <br /> Maintenance Manager <br /> Diamond Walnut Growers , Inc . <br /> ' 1050 South Diamond Street <br /> Stockton, California 95201 <br /> ' Dear Mr . Roth: <br /> This letter is in response to your request for a description <br /> ' of the cleanup and disposal process for the five underground <br /> storage tanks lasted below: <br /> Unit 1 - 2 , 250 gallons - empty propylene glycol <br /> Unit 2 - 350 gallons - empty propylene glycol <br /> Unit 3 - 100 gallons - empty propylene glycol <br /> Unit 4 - 2 , 500 gallons - empty cooling tower water <br /> UNat 5 - 10, 750 gallons - empty brine <br /> It is important to note that all tanks were completely dry and <br /> free from loose material , with the exception of Unit 5 , which <br /> ' contained glass insulation, shoring timbers and a layer of <br /> crushed glass residue on the tank bottom. Units 1 , 4 and 5 <br /> were accessed by properly suited, confined entry crews . <br /> ' Blowers were used at all times during the cleaning process for <br /> these units , and an LEL meter was used to monitor oxygen <br /> content . <br /> tInitially, supporting timbers and glass insulation were <br /> removed from Unit 5 on 10/2 and 10/3 . Teas operation was <br /> accomplished by crew members in safety glasses and respirators <br /> ' who scraped and cleaned the walls. Chunks of glass insulation <br /> were passed to the outside men , who monitored the progress <br /> inside the tank and also loaded the waste onto a flatbed <br /> 1 truck, which was properly covered prior to transport . The <br /> volume of material removed during this phase was approximately <br /> 1250 pounds or 6 . 5 cubic yards . This non-hazardous material <br /> was delivered to the Corral Hollow Landfill in Tracy, <br /> ' California, on 10/12 . <br /> 1 <br /> ' P 0 Box 1257 • Stockton, California 95201 • Number One, Port Road 21, Port of Stockton Stockton, California 95203 <br /> (209) 463-7108 • FAX (209) 463 2712 <br /> 3 <br />