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23 September 2008
<br /> AGE-NC Project No.07-1537
<br /> Page 6 of 8
<br /> 3.2. ANALYTICAL RESULTS OF SOIL SAMPLES
<br /> A total of thirty eight soil samples collected from pilot borings MW7 through MW 11 and ten soil
<br /> samples collected from soil probe boring B5 were analyzed for the constituents listed in Sections
<br /> 2.1.2. and 2.3,respectively. Constituents of concern(COC)were detected in soil samples collected
<br /> from pilot boring MW-11 and from soil boring B5.
<br /> TPH-g was reported in soil samples collected from MW 11-20, MW 11-25, MW11-30, MW11-35,
<br /> MW11-40,MW11-45,MW11-50,MW11-75,and B5-20 at concentrations of 3,800 milligrams per
<br /> kilogram(mg/kg),3,700 mg/kg,220 mg/kg, 19 mg/kg,5.0 mg/kg,60 mg/kg,2.0 mg/kg,640 mg/kg,
<br /> and 1.2 mg/kg, respectively.
<br /> BTEX compounds were detected in soil samples collected from MW 11-20,MW 11-25,MW11-30,
<br /> MW11-35,MW11-40, MW11-45, MW11-65, MW11-75, MW11-90, MW11-98, and 135-20:
<br /> • Benzene was reported in the soil samples collected from MW 11-20,MW 11-25,MW 11-30,
<br /> MW11-35, MW11-45, and MW11-75 at concentrations of 2.1 mg/kg, 2.2 mg/kg, 0.58
<br /> mg/kg, 0.012 mg/kg, 0.076 mg/kg, and 0.078 mg/kg, respectively.
<br /> • Toluene was reported in the soil samples collected from MW 11-20,MW 11-25,MW11-30,
<br /> MW11-35, MW11-75, and 135-20 at concentrations of 150 mg/kg, 260 mg/kg, 13 mg/kg,
<br /> 0.14 mg/kg, 8.4 mg/kg, and 0.042 mg/kg, respectively.
<br /> • Ethylbenzene was reported in the soil samples collected from MW11-20, MW11-25,
<br /> MW11-30, MW11-35, MW11-75, and 135-20 at concentrations of 190 mg/kg, 150 mg/kg,
<br /> 6.0 mg/kg, 0.20 mg/kg, 11 mg/kg, and 0.013 mg/kg, respectively.
<br /> • Xylenes were reported in the soil samples collected from MW 11-20,MW 11-25,MW 11-30,
<br /> MW 11-35,MW 11-40,MW 11-45,MW 11-65,MW 11-75,MW 11-90,MW 11-98,and135-20
<br /> at a maximum concentration of 1,200 mg/kg (MW11-20), 790 mg/kg, 31.7 mg/kg, 1.03
<br /> mg/kg, 1.03 mg/kg,0.028 mg/kg, 1.78 mg/kg,0.0048 mg/kg,71 mg/kg,0.036 mg/kg,0.054
<br /> mg/kg, and 0.16 mg/kg, respectively.
<br /> MTBE was reported in the soil samples collected from MW11-30, MW11-35,MW 11-40,MW11-
<br /> 45, MW11-50, MW11-55,MW l-65, MW11-75,MW l-80,MW11-90,MW11-98,MW l-108,
<br /> and MW11-110 at a maximum concentration of 30 mg/kg (MW 11-30).
<br /> No additional petroleum hydrocarbon constituents were detected at or above laboratory reporting
<br /> limits. Analytical results of the soil samples are summarized in Table 1. Laboratory reports (CTEL
<br /> Proj ect Nos.CT214-0803208 and CT214-0804054),quality assurance and quality control(QA/QC)
<br /> reports, and chain of custody forms are included in Appendix E. Laboratory electronic deliverable
<br /> Advanced GeoEvironmental,Inc.
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