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_. - �. <br /> - , <br /> 1. `H: KLEINFELDER&ASSOCIATES <br /> j f � <br /> 3 SOIL ASSHSStffi�'Y <br /> 3.1 SAMPLING LOCATIONS <br /> Kleinfelder collected soil s:unples at 11, <br /> 16, 21 and 26 feet below the <br /> ground surface from nine borir_gs (B-6 through B-14) on January 21-23, <br /> -i 1987, and from two additional bori?gs (B-15 and B-16) on March 8, 19k37. <br /> �. The locations of these borings and of the five previous borings drilled' <br /> during Phase 1 (B-1 through B-5) are shown on Plate 2. <br /> f The locations of. the 11 borings drilled during Phase 2 were carefi:lly <br /> - <br /> selected :to map the area of contamination. Whenever a boring appeared to <br /> r- encounter contamination based on field screening with the PID gi.e., B-6), <br /> ` ancther boring was drilled 10 ft further from the old tank site along the <br /> ` name radial line (i.e., B-7): This r''o e3s;. continued until an <br /> - <br /> ' a <br /> uncontatni.natzd 1oc.,ta.vn wa.. 'encountered. +i <br /> 3.2 SOIL SAMPLING PROCEDURES <br /> Soil samples 4.ere' collected at f?ur depths il, 16, 21 and 26 feet below � <br /> the ground surface.. Samples were collected below the land surface using a <br /> truck mounted d=ill rig equipped g R pped with 8-inch hollow stem augers. The voil k - <br /> �y <br /> borings were advanced to _a point immediately above the desired sampling <br /> a � 9 depth. A Modified California Sampler lined with three 6-inch brass tubes <br /> f was then driven into the undisturbed soil at the bottom of the boring to, <br /> remove a ., 1.5 foot soil core. The bottom (third) brass rube was rLI-m es9` <br /> r <br /> and sealed with aluminum foil and tight fitting 7 <br /> g g plastic caps, labeled and � <br /> fu placed in an iced cooler for temporary storage. Selected soil samples <br /> were subsequently delivered to. 'California Analytical LaboratoriesInc:. <br /> ' <br /> under chain-of-custody control. The remaining soil samples are being heYd <br /> a <br /> in refr:gecated, storage for goss.ble follow-up anal or <br /> testing. <br /> �II - <br /> 38-87-43 5 <br /> x. <br /> ,,. <br /> r. , <br /> s <br />