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September 16, 1991 <br /> ARCO Service- <br /> Station No. 2076, Lodi. California <br /> FstimIkle of r,,xqavatcd Soil <br /> avity and <br /> excavated from the existing tank c <br /> We estimate 350 cubic yards of soil may be <br /> trenches. The estimate of the volume of soil is based on (1) tile dimensions <br /> Product-line Lccupicd by the <br /> of the existing tank cavity (46 feet by 24 feet bY I-) feet) and the Volume hexcavated <br /> existing tanks(4,024 cubic feet)and(2)the anticipated dimensions of tile Ir <br /> cnc <br /> by 3 feet). Wees estimate ail <br /> during the removal of the product Piping (140 feet by 2 feet <br /> additional 530 cubic yards of soil will be excavated from the proposed tank cavity, (60 feet <br /> by 20 feet by 12 volume will vary <br /> and product lines. Tile actual Iry depending on the final <br /> depths of the excavations. <br /> Soil from the former and proposed tank cavities will be stockpiled separately onsite. -17he <br /> ing to restrict vapor emissions and control dust. <br /> stockpiles will be covered with plastic shect tile stockpiles and analyzed for hydrocarbons <br /> Composite soil samples will be collected from <br /> soil can be classified as nonhazardous. <br /> and to evaluate whether the so <br /> Results of analyses of samples of stockpiled soil will be submitted to tile SjCP14S-e estimEHD and <br /> ate <br /> we will obtain authorization to place soil in the former tank cavity. W <br /> k cavity and 43b0 <br /> approximately 450 cubic yards of soil can be backfilled into the former tan <br /> Mie remaining <br /> soil may e <br /> cubic yard will remain after backfilling the former tank cavity. <br /> moved from the site. The remaining soil be <br /> aerated if appropriate, before the soil is re Class III or Class 11 faciiitv- -nle <br /> disposal of at an appropriate disposal facili1v such as a <br /> disposal of the soil is ARCO's responsibility. <br /> Installation of Conductor -Cising___ <br /> 'k maximum of six conductor casings, two between each new tank,will be installed bfe rom the <br /> base of the new tank cavity to the ground surface. The conductor casing will driven <br /> 9 <br /> 3MB-3W <br /> 1150-1 Kim WIMM <br />