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x ssr _mai = 1 '�•- ,,.. �gms <br /> - earm 3a, <br /> The Beverage Source Inc <br /> 202/799-5030 <br /> '?ay 25, 1968 <br /> Monitored and surveyed zhe three groundwater monitoring <br /> wells to grade to determine the local groundwater <br /> gradient. <br /> Develcmed the three monitoring wells and obtained <br /> groundwater samples for analysis of TPA using EPA <br /> Method 418.1; T7rl as gasoline and BTEX using modi fie <br /> EPA Method 502, and for FNAs using EPA Method 610. <br /> SOIL SPRINGS <br /> The purpose of the soil borings was to explore and define <br /> the lateral and vertical extent of soil contamination (if <br /> encountered) around the perimeter of the excavated tank pit. <br /> - Five of the eight soil borings were drilled to a total depth of <br /> approximately 41.5 feet below grade. The remaining three soil <br /> borings were drilled to depths of 48 to 52 feet below grade, for <br /> the installation of monitoring wells (see Site Plan, Figure 2) . <br /> All soil borings were drilled with a truck-mounted drill <br /> rig, using, 7.0-inch outside diameter (O.D. ) hollow-stem augers. <br /> The dilling was supervised by __eld geologist .nor'_{ing under <br /> the direction o- a rea"stered civ;1 engineer. ^`_-:e .field aeolo- <br /> glsz ^a1 rained a c^...._::ucus lag _ _ne mater al3 <br /> Auring dr_I1zng (see peSCs_i _, ,:4 .cgs) . <br /> SOIL 5.A11LnLITG <br /> SOi1 SafZ les were Cit = ZeC at 7-:CO, intervals, begin-_ng <br /> =_pprOx-:«a.el,, _ee ,below grade 'he ❑ot:cm of each DCr_ng. <br /> ;p lit-S74Cn sample=. ��n ed :Jit hree 2-inch d:.ameter y 6-].^.C.^. <br />