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Appendix D Direct Push Boring Investigation
<br /> Phase 11 ESA Multi-Modal Station"Six-Block Project'
<br /> January 6,2003
<br /> Page 10 of 15
<br /> 4.3 BLOCK 2
<br /> •
<br /> Between May 28 and June 4, 2002, twenty Geoprobe bonngs and two detection bonngs were installed an
<br /> seven parcels of Block 2 Geoprobe and detection bonng locations for Block 2 is presented in Figure 7,
<br /> Appendix A
<br /> Laboratory analytical results of the soil and groundwater samples collected from the Block 2 properties
<br /> indicate that no VOCs were detected in the soil or groundwater samples, with the exception of
<br /> chloroform Chloroform was detected at a concentration of 1 6 pg/L in the groundwater sample collected
<br /> from bonng DBK2-830-1
<br /> 4.4 BLOCK 3
<br /> Between May 23 and May 28, 2002, five Geoprobe borings and three detection bonngs were installed on
<br /> three parcels of Block 3 Geoprobe and detection boring locations for Block 3 is presented in Figure 8,
<br /> Appendix A
<br /> Laboratory analytical results of the soil and groundwater samples collected from the Block 3 properties
<br /> indicate that no VOCs were detected in the soil samples However, chloroform, TCE, and toluene were
<br /> detected in groundwater samples collected from 930 E Miner Avenue Chloroform was detected at a
<br /> concentration of 0 9 µg/L in sample DBK3-930-1-5123102 TCE was detected at a concentration of 0 6
<br /> gg/L in sample DBK3-930-2-5/23/02 Toluene was detected in samples DBK3-930-1-5/23/02 and DBK3-
<br /> 930-2-5/23/02 at concentrations of 1 1 and 1 6 pg/L, respectively
<br /> The concentrations of toluene and TCE detected in DBK3-930--2-5/23/02 are generally similar to those of
<br /> DR4-5122102, a sample collected immediately east of DBK3-930-2-5/23/02 Low concentrations of
<br /> toluene were also detected in D13K3-930-1-5123102 and DR5-5/22/02 These toluene detections may be
<br /> related to a UST that was removed from 930 E Miner Avenue in November 1993 The origin of the TCE,
<br /> however, is unclear
<br /> 4 5 BLOCK 4
<br /> Between September 9 and September 16, 2002, ten Geoprobe bonngs, 16 detection borings, and four
<br /> hydropunch borings were installed on three parcels of Block 4 Geoprobe, detection, and hydropunch
<br /> boring locations for Block 4 is presented in Figure 9, Appendix A
<br /> Laboratory analytical results indicate acetone, 2-butanone, ethylbenzene, m,p-xylene, o-xylene,
<br /> isopropylbenzene, n-propylbenzene, 1,3,5-tnmethylbenzene, tert-butylbenzene, 1,2,4-tnmethylbenzene,
<br /> sec-butylbenzene,4-isopropyltolucne,n-butylbenzene, naphthalene,TPH-G, and TPH-D were detected in
<br /> soil samples collected from 730 E Channel Street Acetone was detected at a concentration of 25 mg/kg
<br /> in sample DBK4-730-5-15 2-Butanone was detected at a concentration of 97 mg/kg in sample DBK4-
<br /> 730-5-15 Ethylbenzene was detected at concentrations of 3 6, 0 8, 3 9, and 21 mg/kg in samples DBK4-
<br /> 730-5-15, DBK4-730-10-15, DBK4-730-10-25, and DBK4-730-10-30 5, respectively M,p-xylene was
<br /> detected at concentrations of 6 7 and 130 mg/kg in samples DBK4-730-10-25 and DBK4-730-10-30 5,
<br /> respectively O-xylene was detected at a concentration of 20 mg/kg in sample DBK4-730-10-30 5
<br /> Isopropylbenzene was detected at concentrations of 5 2, 0 30, and 8 1 mg/kg in samples DBK4-730-5-15,
<br /> DBK4-730-10-15, and DBK4-730-10-30 5, respectively N-propylbenzene was detected at concentrations
<br /> of 9 0, 0 68, 2 5, and 12 mg/kg in samples DBK4-730-5-15, DBK4-730-10-15, DBK4-730-10-25, and
<br /> DBK4-730-10-30 5, respectively 1,3,5-Trimethylbenzene was detected at concentrations of 8 1 and 33
<br /> mg/kg in samples DBK4-730-10-25 and DBK4-730-10-30 5, respectively Tert-butylbenzene was
<br /> detected at concentrations of 4 2 and 22 mg/kg in samples DBK4-730-10-25 and DBK4-730-10-30 5,
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