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Ms. Diane Hinson <br /> 202/150-4150 <br /> March 29, 1989 <br /> Page 2 <br /> 1. Texaco would drill, log and sample (5-foot intervals) <br /> soil borings (SB) 1, 2 , and 3 , in the vicinity of the <br /> removed product dispensers (see Figure 1) . These <br /> borings will be used first, to determine the extent of <br /> soil contamination; second, the depth to groundwater; <br /> and third, the angle needed to adequately drill and <br /> sample beneath the canopy (the angle is not to exceed <br /> 45 degrees off vertical, for safety reasons) . <br /> 2 . Drill, log and sample angle borings (AB) 1, 2, and 3 to <br /> determine the extent of subsurface contamination below <br /> the canopy. <br /> 3 . Texaco reserves the right to drill additional borings, <br /> as needed, to determine the extent of hydrocarbon <br /> contamination. <br /> 4 . Drill and install three 4-inch PVC monitoring wells <br /> (MW) . Each well would be completed with a bentonite <br /> and cement grout seal. Representative groundwater <br /> samples would be obtained from each well and submitted <br /> for laboratory analyses. <br /> 5. All samples would be field screened on site with a <br /> photo-ionization detector (PID) . Selected soil samples <br /> will be submitted for laboratory analyses. All <br /> submitted samples will be analyzed for total petroleum <br /> hydrocarbons (TPH) as gasoline; benzene, toluene, <br /> ethylbenzene, and xylene (BTEX) ; tetra-ethyl lead <br /> (TEL) ; and ethylene dibromide (EDB) . <br /> Texaco would like to begin the site work as soon as possible, and <br /> has scheduled a drilling rig for April . Therefore, we are <br /> formally requesting that this proposed work plan be given <br /> priority review, as outlined in the communication from Jogi <br /> Khanna dated December 29 , 1988 . Please bill the Sacramento <br /> District office of Groundwater Technology, Inc. for the review <br /> fees . <br />