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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 14 of 15
<br /> mg/kg in samples GBK6-931-1-6, GBK6-93 1-1-10, and GBK6-931-1-15, respectively Tert-butyibenzene
<br /> • was detected at concentrations of 0 20, 0 014, and 0 73 mg/kg in samples GBK6-931-1-6, GBK6-931-1-
<br /> 10, and GBK6-931-1-15, respectively 1,2,4-Tnmethylbenzene was detected at concentrations of 2 03,
<br /> 0 081, and 4 0 mg/kg in samples GBK6-931-1-6, GBK6-931-1-10, and GBK6-931-1-15, respectively 4-
<br /> Isopropyltoluene was detected at concentrations of 0 035 and 0 063 mg/kg in samples GBK6-931-1-6 and
<br /> GBK6-931-1-15, respectively 1,2-Dichlorobenzene was detected at concentrations of 0083 and 0 13
<br /> mg/kg in samples GBK6-931-1-6 and GBK6.931-1-15, respectively N-butylbenzene was detected at a
<br /> concentration of 032 mg/kg in sample GBK6-931-1-15 Naphthalene was detected at concentrations of
<br /> 0 042 and 0 035 mg/kg in samples GBK6-931-1-6 and GBK6-931-1-15, respectively 1,2-
<br /> Dichlorobenzene was detected at a concentration of 0 5 mg/kg in sample GBK6-931-1-15 4-
<br /> Methylphenol was detected at concentrations of 3 2, 0 4, and 4 8 mg/kg in samples GBK6-931-1-15,
<br /> GBK6-931-2-10, and GBK6-931-2-15, respectively TPH-G was detected at concentrations of 230,000
<br /> and 76,000 mg/kg in samples GBK6-931-1-15 and GBK6-931-2-15,respectively TPH-D was detected at
<br /> concentrations of 290, 1 5, 33, and 320 mg/kg in samples GBK6-931-1-15, GBK6-931-1-17, GBK6-93I-
<br /> 2-10, and GBK6-931-2-15, respectively The sample chromatograms for TPH-D in samples GBK6-931-
<br /> 1-15, GBK6-931-2-10, and GBK6-931-2-15 did not appear to match the standard chromatogram for TPH-
<br /> D and the reported concentrations are estimated TPH-MO was detected at 1,700, 15, and 1,700 mg/kg in
<br /> samples GBK6-931-1-15, GBK6-931-2-10, and GBK6-931-2-15, respectively The sample
<br /> chromatograms for TPH-MO in samples GBK6-931-1-15 and GBK6-931-2-15 did not appear to match
<br /> the standard chromatogram for TPH-D and the reported concentrations are estimated
<br /> Four soil samples (GBK6-931-1-15, GBK6-931-1-17, GBK6-931-2-10, and GBK6-931-2-15) from 931
<br /> E Weber were analyzed for the CAM 17 Metals and pH Beryllium, mercury, selenium, silver, and
<br /> thallium were not detected in any of the soil samples Antimony, arsenic, barium, cadmium, chromium,
<br /> • cobalt, copper, lead, molybdenum, nickel, vanadium, and zinc were all detected at values below the
<br /> United States Environmental Protection Agency (EPA) Region IX Preliminary Remediation Goals
<br /> (DRGs) The pH reported for samples GBK6-931-1-15, GBK6-931-1-17, GBK6-931-2-10, and GBK6-
<br /> 931-2-15 was 6 9, 8 2, 6 5, and 6 9,respectively
<br /> Laboratory analytical results indicated acetone, 1,1-DCE, 1,1-dichloroethane (1,1-DCA), chloroform, 1,2-
<br /> DCA, PCE, 1,3,5-trimethylbenzene, tert-butylbenzene, 1,2,4-tnmethylbenzene, 1,2-dichlorobenzene,
<br /> naphthalene, and 4-methylphenol were detected in the groundwater samples from the Block 6 properties
<br /> Acetone was detected at a concentration of 220 µg/L in GBK6-931-1-5129/02 1,1-DCE was detected at a
<br /> concentration of 14 gg/L in sample DBK6-931-1-5/29/02 1,1-DCA was detected at a concentration of
<br /> 0 7 gg/L in sample DBK6-931-1-5/29/02 Chloroform was detected at concentrations of 1 1 and 2 4 µg/L
<br /> in samples DBK6-128-5/28/02 and DBK6-931-2-5/29102, respectively 1,2-DCA was detected at a
<br /> concentration of 0 9 4g/L in sample DBK6-931-1-5/29/02 PCE was detected at concentrations of 7 7 and
<br /> 0 5 ggl in samples DBK6-128-5128/02 and DBK6-931-1-5/29/02 1,3,5-Trimethylbenzene was detected
<br /> at a concentration of 42 gg/L in sample GBK6-931-1-5/29/02 Tert-butylbenzene was detected at a
<br /> concentration of 25 gg/L in sample GBK6-931-1-5129/02 1,2,4-Trimethylbenzene was detected at a
<br /> concentration of 140 gg/L in sample GBK6-931-1-5/29/02 1,2-Dichlorobenzene was detected at a
<br /> concentration of 12 µg/l, in sample GBK6-931-1-5129/02 Naphthalene was detected at a concentration of
<br /> 5 5 µg/L in sample GBK6-931-1-5129/02 4-Methylphenol was detected at a concentration of 130 pg/L in
<br /> sample GBK6-93 I-1-5/29/02
<br /> Soil contamination at Block 6 was limited to the samples collected from borings GBK6-931-1 and GBK6-
<br /> 931-2 Acetone, carbon disulfide, 2-butanone, toluene, ethylbenzene, m,p-xylene, o-xylene,
<br /> isopropylbenzene, n-propylbenzene, 1,3,5-tnmethylbenzene, tert-butylbenzene, 1,2,4-tnmethylbenzene,
<br /> • 4-isopropyltoluene, 1,2-dichlorobenzene, n-butylbenzene, and naphthalene were only detected in only
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