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, <br /> 7 <br /> STREAMS <br /> There are no major streams or tributaries in <br /> site. Localized drainage is to the dee the area of the <br /> the site. P pit immedia:_eiy south of f <br /> . r <br /> SEPTIC TANKS <br /> The plant is serviced by a septic tank system and leach- <br /> fields which are located about 5000 '+ east of the maintenance <br /> shop and storage tank facilities. <br /> UTILITIES <br /> There are no underground utilities. in the area of the <br /> storage tanks. <br /> BUILDING <br /> 1 <br /> The maintenance building adjoins the tank hole and has a <br /> concrete slab floor. Some vapors are expected to be found under <br /> this slab. <br /> i <br /> POTENTIAL SO <br /> URCES OF CONTAMINATION <br /> t <br /> There are no other known sources of off-site contamination <br /> in the area. <br /> F <br /> PROPOSED INVESTIGATION <br /> The proposed preliminary investigation would consist of four <br /> or more borings located as shown on Plate 3. Boring No. 1 would <br /> be in the tank hole to the limit of contamination or to the water <br /> table, whichever occurs first. Sampling would start at 15 ' which <br /> is the approximate bottom of the tank hole. <br /> Boring Nos. 2, 3, and 4 would be located about. 30 ' to 50 ' <br /> from the tank hole and would extend to a depth below the <br /> contamination or water table, whichever occurs first. Sampling <br /> would start at five feet deep. <br />' x <br /> DRILLING AND SAMPLING <br />, <br /> All drilling will be done using an 8" hollow stem auger . <br /> Soil samples will be taken each five foot interval using 2" x 4" k <br /> ( ,; brass cylinders. <br /> i <br /> -3- <br /> J <br />