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KEI-P91-0202 .QR1 May 4 , 1992 Page 3 Analytical results of these samples also indicated non-detectable levels of both total lead and EDB for all six samples. Analytical results of the soil samples collected fter additional excavation at sample point C2 [i.e. , mgles C2(26) SSW .W S, §W-E., and_Si� nd'- cated'�benzen�l_ev_eTs_at-0:.,0.0. 7 p}am_and 0 057 p f4 samples SW N• and_S.W 'I respectively, while samples C2 (26)_ SW=�5 "and;' 5W-W shote level of TPgas,oline raaagng_fram_2_._5_p. m tQ-6_.1_pp X. .. } ene�euels�rang�ng=fram-o=..19 pp. to 0.57 pp Samples SW- N and SW-E showed non--detectable levels of TPH as gasoline. Analytical results of the 11 p96dac_t-p :pe trent ; mpmpie' indicated non-detectable levels of TPH asgasoline, total lead, and EDB for all samples, with 'ben'z`e'ne eve:ls_ranc ng_...from-0.._GG6:8_ ppm o_0.._Q1.8 p.'p.., The analytical results also indicated non-detectable levels o PH as diesel for samples P1 through P3 . The analy_tica-l_re$ lts of the soil samples collected from beneath e ate_ al�taii�t and remote f_i1lline (samples WO1 and P12") ltcicated non-detectable levels of TEPH, BTX&E, PCB' s, and all EPA method 8010 constituents for both samples. The analytical results also indicated-a_non,_dete.�ctab.le level of TPH as gasoline for sample ;; T�h`e_metal--concentrations-f.or each—sample_axe_as_indicated_iA T:A 1e�b. The results of the soil analyses are summarized in Tables 5 and 6. To comply with the requirements of the regulatory agencies and based on the analytical results, KEI proposed the installation of three monitoring wells. Documentation of tank removal protocol, soil sample collection techniques, and the analytical results of the soil samples from the tank excavation are summarized in KEI ' s report (KEI-J91-0202 .R1) dated April 9 , 1991. On August 27 , 28 , and 29, 1991, three two-inch diameter monitoring wells (designed as MW1, MW2 , and MW3 on the attached Site Plan, Figure 1) were installed at the site. The monitoring wells were drilled and completed to total depths ranging from 82 to 86 feet below grade. ate was encountered at depths ranging from 73 to 7,5 n , feet 'beeath ah �surfa e ' during drilling. The surface of each well cover was surveyed by Kier & Wright of Pleasanton, California, to Mean Sea Level (MSL) and to a vertical accuracy of 0. 01 feet. The wells were attempted to be developed on September 3 , 1991. However, field data collected indicated that sand and silt materials remained in the water within the well casing. The wells were initially sampled on September 9, 1991.