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McClelland engineers <br /> 2140 Eastman Avenue, Ventura, California 93003, <br /> (805) 644-5535, Telex: 659241 <br /> July 29, 1988 <br /> Job No. 0588-1603 <br /> Ogden Environmental Services, Inc. <br /> 10955 John Jay Hopkins Drive <br /> San Diego, CA 92121 <br /> Attention: William S. Rickman <br /> Dewatering Wells <br /> Former Tillie Lewis Foods Cannery <br /> Stockton, California <br /> As part of the overall remedial activities proposed at the former Tillie <br /> Lewis Foods Cannery, McClelland Engineers proposes to construct a series of <br /> dewatering wells and piezometers in the vicinity of the tank area. The inner <br /> perimeter dewatering wells (see Plate 1) will be pumped initially to remove <br /> as much free product, as possible, prior to pumping of the outer perimeter <br /> wells. The outer perimeter dewatering wells will be pumped during the <br /> excavation to facilitate earthwork activities. Discharge water will be <br /> treated onsite with an oil-water separator and conveyed to the local sanitary <br /> sewer pursuant to the City of Stockton, Municipal Utilities Department <br /> regulations. The piezometers will be used to monitor water levels during the <br /> dewatering activities. Details of the Remediation Plan were provided by <br /> Ogden Environmental Services in a report dated May 1988. <br /> McClelland proposes to install approximately 182 dewatering wells (at <br /> 6-foot spacing intervals) , and approximately 10 piezometers (see Plate 1 for <br /> locations) . Our services will include the following: <br /> 1. Drill well holes for dewatering wells to a depth of about 30 feet <br /> for inner perimeter wells and 30 to 50 feet for outer perimeter <br /> wells; install 4-inch-diameter PVC wells; develop wells to maximize <br /> yield; install jet educator pumps and plumbing connections to the <br /> water treatment unit. <br /> 2. Drill well holes for piezometers to depths ranging from about 12 <br /> feet to 50 feet below ground surface; install 2-inch-diameter PVC <br /> wells and develop accordingly. <br />