|
AECOM Report on Soil Vapor Sampling and Human Health Risk Assessment
<br /> Table 1 —SV-1 Results for All Events
<br /> Concentration (ppbv)
<br /> Compound by Sample Date
<br /> May 20,2010 September 9,2010 October 20,2010
<br /> Benzene 15 20 ND
<br /> Ethylbenzene ND ND ND
<br /> Toluene ND ND ND
<br /> m,p-Xylene ND ND ND
<br /> o-Xylene ND ND ND
<br /> Naphthalene ND ND ND
<br /> 1 TPHg 110,000 250,000 4,100
<br /> (470,000 ug/m3) (1,000,000 ug/m3) (17,000 Ng/m3)
<br /> Tentatively Identified Compounds'
<br /> ' Pentane,2,4-dimethyl- 8,500 6,100 41
<br /> Pentane,2,3-dimethyl- 7,000 4,100 —
<br /> ' Butane,2,2,3,3-tetramethyl- 36,000 51,000 =
<br /> Hexane,2,5-dimethyl- 4,900
<br /> Hexane, 1,1'oxybis- 7,900 — —
<br /> Unknown 3,600 4,900 3,700
<br /> Cyclopentane, 1,2,4-trimethyl- 3,400
<br /> ' Pentane,2,3,4-trimethyl- 19,000 26,000 200
<br /> Pentane,2,3,3-trimethyl- 24,000 30,000 580
<br /> Heptane,2,2-dimethyl- 3,600 — 44
<br /> 1-Propene, 1,1,2,3,3,3-hexafluoro- — 4,100 4,500
<br /> Unknown 4,400 46
<br /> Hexane,2,2,4-trimethyl- — 6,400 —
<br /> tDecane,2,2,5-trimethyl- — 6,000 —
<br /> 2-Pentene,3-methyl-,(Z)- — — 120
<br /> Heptane,2,2,4,6,6-pentamethyl- _ — 480
<br /> Hexane, 1-(hexyloxy}2-methly- 48
<br /> APH Analysis—Carbon Chains
<br /> C5-C6 Aliphatic Hydrocarbons(ref.to — ND
<br /> Pentane+Hexane)
<br /> >C6-C8 Aliphatic Hydrocarbons(ref. — 990
<br /> 1 to Heptane) —
<br /> >C8-C10 Aliphatic Hydrocarbons(ref. —
<br /> 120
<br /> to Decane)
<br /> >C10-C12 Aliphatic Hydrocarbons — ND
<br /> (ref.to Dodecane)
<br /> >C8-C10 Aromatic Hydrocarbons(ref. — ND
<br /> to 1,2,3-TMB) —
<br /> >C10-C12 Aromatic Hydrocarbons — ND
<br /> ' (ref.to 1,2,4,5-TMB)
<br /> 1 =All values are estimated,based on presumptive evidence.
<br /> ' 60146516M70 De mber15,2010
<br />
|