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' 0 0 <br /> ' an aquiclude. An aquiclude does not yield water freely nor is it <br /> ' capable of transmitting appreciable water to or from adjacent <br /> aquifers (i.e., more permeable soils). <br /> ' 3.0 TANK REMOVAL PROCEDURES <br /> 3.1 Empty Tanks Of Product <br /> ' As much of the tank contents as possible were removed by hand- <br /> held suction hose in each of the UST's by the use of a vacuum truck. <br /> Worker entry was only possible in the concrete-vault tank. <br /> Otherwise, access to cleaning out the steel-tank interiors was <br /> ' limited to tank-top openings smaller than that to permit worker <br /> entry. Required safety precautions were maintained while workers <br /> ' were inside the vault (i.e., protective clothing, gloves, boots, etc., <br /> full-face respirator with supplied air, SCBA equipment, safety line, <br /> safety man). Each tank underwent a cleansing, flushing, and triple- <br /> rinsing procedure using a cleaning agent that helped neutralize tank <br /> interior walls and was then flushed with a high-pressure water <br /> spray capable of rinsing down the product. The rinseate was <br /> transferred to vacuum truck and transported off site by Erickson, <br /> Inc. The cleaning and rinsing of the tanks was inspected by Mr. <br /> ' William R. Snavely, R.S. (Registered Sanitarian), representing the <br /> San Joaquin Local Health District. <br /> Debris from the concrete vault, tank #1 , was removed prior to <br /> rinsing. Nearby ground surface was covered with visquene upon <br /> ' which this debris was placed to prevent contamination of the soil. <br /> The debris was later loaded into a hazardous-waste container <br /> provided by Erickson, Inc. The container was subsequently <br /> ' transported to an approved waste management facility for disposal. <br /> 3.2 Access Tanks For Lifting <br /> ' A backhoe was used to excavate soils around the perimeter of <br /> the steel tanks. The east side of the excavation was supported by a <br /> brick footing. According to Mr. Al Clark of Valley Welding Supply, <br /> ' this footing and the foundation floor above tank #4 were part of the <br /> old Delmonte Cannery facility that previously occupied the site. <br /> ' 3 <br />