REMOVAL_1988 CLOSURE IN PLACE - Laserfiche WebLink

Home Browse Search

r PAYMENT RECEIVED KAPREALIAN ENGINEERING, INC. K E I Consulting Engineers SEP 2 8 1987 P. O. BOX 913 BENICIA, CA 94510 ENVIRONMENTAL HEALTH (415)676-9100 (707)746-6915 PERMITISERVICES September 25, 1987 San Joaquin Local Health District 1601 East Hazelton Avenue Stockton, CA 95201 Attn: Mr. Doug Wilson RE: Drilling Plan/Proposal Mobil Terminal 3505 Navy Drive Stockton, California Dear Mr. Wilson: Enclosed please find an application and fee for permit to drill one 8-inch boring at the referenced site. The purpose of the boring is to take undisturbed soil samples beneath a 550 gallon underground heating oil storage tank at the site to determine if it can be abandoned in place. The boring will be angle-drilled at 45 degrees with a hollow-stem flight auger drill rig so that soil samples can be collected directly beneath the tank. One and possible two undisturbed soil samples will be collected beneath the tank at a depth of approximately 9 feet with a California- modified split spoon sampler. The brass liners holding the samples will be sealed with aluminum foil and plastic caps, labeled and stored in a cooled ice chest for delivery to Sequoia Analytical Laboratory in Redwood City, California. After completion, the boring will be pressure-grouted with a slurry of neat cement. The attached location plan shows the approximate position where the boring will be started. The position may be changed in the field if unanticipated obstructions are encountered. From the starting position, a 45 degree boring will intersect a perpendicular from the bottom of the tank after approximately 12 . 5 feet of auger have been advanced. The groundwater beneath the site lies at approximately 11 feet. The groundwater flow direction is south-southeasterly as of August 17, 1987. The hydraulic gradient is very flat, as described in our report dated August 24, 1987 .