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E <br /> Chronology SITE CODE: 1988 <br /> 1541 Charter Way <br /> Page 3 <br /> 09/26/89- 5 borings drilled around former tank area <br /> 09/27/89 <br /> 1,1/89 Phase II Site Investigation - Repor;, of 9-89 work <br /> MWscreened 27.5 feet-37.5 feet i- sampled at L <br /> 20 feet and 30 feet - bored to 43 feet ND at/in boring 1 <br /> MW 1 screened 32 feet - 42 feet sampled at 15 feet, 20 feet, 25 feet, <br /> - I <br /> 'i <br /> 30 feet - bored to 47 feet <br /> At 20 feet BJ8 ppm, T .1 -ppm, E 2.12 ppm, X S ppm, j <br /> TPH-g 188.6 ppm, TPH-d 102 ppm t 6 L,a�cwyi <br /> Boring 1 26k feet bgs sampled 15 feet, 20 feet, 25 feet BTEX .02, <br /> TPHld 10 ppm, TPH-g 5 ppm <br /> Boring 2 21k feet sampled 10 feet,,i 15 feet, 20 feet ND at DL in <br /> boring 1 <br /> Boring 3 26k feet sampled 15 feet,', 20 feet, 25 feet ND at DL in <br /> boring 1 <br /> Boring 4 21� sampled 10 feet, 15 feet, 20 feet ND at DL in <br /> boring 1 <br /> Boring 5 26k sampled 5 feet, 10 feet, 15 feet, 20 feet, 25 feet at <br /> 15 feet T .17 ppm, TPH-g 13.96 .27 ppm, TPH-d 47 ppm <br /> at 20 feet B.Oj ppm, T.111 ppm,C.62 ppm X 4.06 ppm <br /> i <br /> No chlorinated solvents detected in any soil samples 4e <br /> I <br /> Wells surveyed 10-06-89 by Kjeldse!n, Sinnock & Asso. <br /> MW-`sampled 10-10-89 Vv D S <br /> MWS sampled 09-28-89 <br /> Sample results ND BTEX .5 ppb, TPH-d 500 ppb <br /> Gradient - south <br /> ' Static water 25 feet First water 32 feet <br /> (confined aquifer?) <br /> 05/09/90 Received Dames & Moore "Monitoring Well Water Report" dated <br /> 04-25-90 <br /> Gradient south - southwest <br /> Bio National extracting water from MW-1, treating it with <br /> ultraviolet <br /> i ozone and carbon filter methodologies <br /> Water Sample results <br /> 'i <br /> 02/21/90 Per Chain of Custody <br /> B T E X TPH-g TPH-d <br /> MW3 ND ND ND ND ND ND <br /> MW4 ND ND ND ND ND ND ** <br /> 02/22/90 MW5 ND ND ND ND ND ND <br /> L DL .7 ppm 50 ppm 200 ppb <br /> I <br /> (1 -T <br />