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AECOM Report on Soil Vapor Sampling and Human Health Risk Assessment 2-4
<br /> T045 Results for SV-1
<br /> Septetuber 9,2010,Event
<br /> ppbv pglm'
<br /> Compound Detection Amount i64
<br /> Amount (Pwm)CHHSL ESL3
<br /> Limit Detected
<br /> Detected (pg/m� (PWM3)
<br /> Benzene 15 20 62 122 280
<br /> 21 (67) 36.2 84
<br /> Toluene 15 ND ND 378,000 180,000
<br /> [135,000 [63,000]
<br /> Ethylbenzene 15 ND ND 1,400 3,300
<br /> [420] [980]
<br /> M,p-Xylenes 15 ND 64 ND 887,000 58,000
<br /> [317,000] [21,000]
<br /> o-Xylenes 15 ND 64 ND 879,000 58,000
<br /> [315,000] 21,0001
<br /> Naphthalene 59 ND 310 ND 106 240
<br /> [31.9] [72]
<br /> TPHg :300 250,000 1,200 11000,000 —' 29,000
<br /> [10,000]
<br /> ND=Not detected above detection limit.
<br /> 1 =There is no published CHHSL for TPHg.[Refer to Section 3.1.1 for a discussion of CHHSL and TPHg]
<br /> Due to the disparity between the BTEX and naphthalene concentrations compared to the TPHg
<br /> concentration,AECOM requested that the laboratory provide tentatively identified compound (TIC)
<br /> concentrations for the top ten non-target species,the results of which are summarized in the following
<br /> table.
<br /> TIC Results for SV-1
<br /> September 9,2010,Event
<br /> Compound Amount Detected' Compound Amount Detected'
<br /> ppbv) (ppbv)
<br /> Pentane,2,4-dimethyl- 6,100 Unknown 4,900
<br /> Pentane,2,3-dimethyl- 4,100 1-Propene, 1,1,2,3,3,3-hexafluoro- 4,100
<br /> Butane,2,2,3,3-tetraME.1h f- 51,000 Unknown 4,400
<br /> Pentane,2,3,4-trimethyl- 26,000 Hexane, 2,2,4-trimethyl- 6,400
<br /> Pentane,2,3,3-trimethyl- 30,000 Decane,2,2,5-trimethyl- 6,000
<br /> 1 =Values are estimated,based on presumptive evidence.
<br /> A discussion of the laboratory analytical results is provided below in Section 2.5.The laboratory
<br /> analytical report, including COC documentation, is included in Attachment B-
<br /> 601465 6-M10 December 15,2010
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