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WIN <br /> 0 <br /> \/ <br /> McClelland engineers,inc. SEP 2 0 1988 <br /> 2140 Eastman Avenue,Ventura,California 93003, ENVIROMENTAL HEALTH <br /> Tel. (805) 644-5535,Telex:659241 FERMIT/SERVICES <br /> September 16, 1988 <br /> P.N. 0588-1603 <br /> Environmental Health Division <br /> San Joaquin Local Health District <br /> 1601 East Hazelton Avenue <br /> Stockton, CA 95201 <br /> Attention: David Carls <br /> Well Abandonment <br /> Former Tillie Lewis Foods Cannery <br /> Stockton, California <br /> In conjunction with ongoing remediation at the former Tillie Lewis foods <br /> cannery, McClelland Engineers plans to abandon groundwater monitoring wells, <br /> dewatering wells, and piezometers in the vicinity of the tank area. The <br /> locations of the wells are shown on Plate 1. The outer perimeter dewatering <br /> wells will remain operational throughout the excavation and are not proposed <br /> for abandonment at this time. These wells will be abandoned after completion <br /> of remediation activities at the former Tillie Lewis Foods cannery in accord- <br /> ance with the San Joaquin Local Health District regulations. The presently <br /> proposed activities include the following: <br /> 1. Abandon the existing groundwater monitoring wells (KF-MW-1, 2, 3, <br /> and MEI-MW-1, 2, 3) and the inner perimeter dewatering wells by <br /> complete removal of well materials and gravel pack during excava- <br /> tion for contaminated soil. The monitoring wells were completed to <br /> depths of between 25 to 30 feet below ground surface. The inner <br /> perimeter dewatering wells were completed to depths of about 30 <br /> feet below ground surface. The proposed excavation grade will be <br /> at or below the base of the groundwater monitoring wells and the <br /> inner perimeter dewatering wells. <br /> 2. Abandon all piezometers that extend below the proposed excavation <br /> grade by grouting the wells in place. The piezometers were com- <br /> pleted at depths ranging from 12 to 50 feet below ground surface. <br /> Wells below the proposed excavation grade will be grouted from <br /> bottom to top with a neat cement-bentonite grout. Shallow <br /> piezometers that do not extend below the base of the proposed <br /> excavation will be abandoned in ,the same manner as that proposed <br /> for the groundwater monitoring wells and inner perimeter dewatering <br /> wells (i.e. , complete removal of well materials and gravel pack <br /> during excavation) . <br />