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<br /> Table 2
<br /> Residual Target Compounds
<br /> Physical and Chemical Characteristics
<br /> Former Chevron U S A Service Station 9-1918
<br /> 45 East Harding Way at EI Dorado Avenue
<br /> Stockton,California
<br /> Parameters Benzene Toluene Eth lbenzene Xylenes
<br /> Toxicity Exposure Routes inhalation,dermal,and Inges- Exposure Routes Inhalation,dermal,and Exposure Routes Inhalation,dermal and Exposure Routes inhalation,dermal,and
<br /> Von ingestion Ingestion ingestion
<br /> Exposure Duration and Effects Exposure Duration and Effects Exposure Duration and Effects Exposure Duration and Effects
<br /> short term-upper respiratory,eye,and dermal short term-upper respiratory,eye,and short term-upper respiratory,eye,and short term-upper respiratory,eye,and
<br /> Irritation, dermal Irritation,depresses central nerv- dermal Irritation,pulmonary changes, dermal Irritation,Impaired memory,
<br /> Iona term-carcinogen ous system, long term-reproductive effects and long term-effects on nervous system,
<br /> long term-kidney and liver damage respiratory problems liver,Lungs,and heart
<br /> Persistence Soil rapid volatilization near surface,highly Boll will evaporate near surface or be lost Soil absorption Is minimal,absorbed Soil will evaporate and leach into
<br /> mobile in soil and may leach to groundwater,will by microbial degradation,mobile In sod fraction will leach into groundwater espe- groundwater,degrades under aerobic or
<br /> biodegrade and will leach to groundwater where slow cially in low organic soils,evaporate,or anaerobic dendnfying conditions,rates
<br /> biodegradation will occur slowly biodegrade depend on concentrations,residence
<br /> Water will volatilize and biodegrade time,sod type,and microbiaf population
<br /> Water will volatilize and biodegrade, Water will volatilize or biodegrade(rate
<br /> Vapor will remain in vapor phase due to high dependent on water temperature,mixing due to turbulence and microbial popula- Water will volatilize and biodegrade,
<br /> vapor pressure,subject to biodegradation conditions,and the existence of microbial tions) dependent on water temperature,mixing
<br /> Chemical degradation half life of hours to weeks populations conditions,and the existence of microbial
<br /> in the atmosphere Vapor will remain In vapor phase due to populations
<br /> Vapor will remain in vapor phase due to high vapor pressure Subject to vadose
<br /> high vapor pressure Subject to vadose zone biodegradation,chemical degrada- Vapor will remain In vapor phase due to
<br /> zone biodegradation,chemical degrada- tion in the atmosphere as for benzene high vapor pressure Subject to vadose
<br /> tion in the atmosphere as for benzene zone biodegradation,chemical degrada-
<br /> tion in the atmosphere as for benzene
<br /> Transport Relatively mobile in vapor and groundwater,rela- Relatively mobile in vapor and groundwa- Relatively mobile in vapor and groundwa- Relatively mobile in vapor and groundwa-
<br /> tively immobile In soil,Water solubility ter,relatively immobile in sod Water ter,relatively immobile in soil Water ter,relatively immobile In soil Water
<br /> 1,701 mg/L, solubility 534 8 mg/L, solubility 161 mg/L, solubility 175 mg1L,
<br /> Vapor pressure 9519 mm Hg @ 25°C Henry's Vapor pressure 28 4 mm Hg @ 25°C Vapor pressure 9 53 mm Hg @ 25°C Vapor pressure 6 6 mm Hg Q 25°C
<br /> Law 5 43 x 10-3 atm x m 31moie Henrys Law 5 94 x 10-3 atm x m 3/mole Henry's Law 8 44 x 10-3 atm x m 3/mole Henry's Law 51 x 10-3 atm x m 3/mole
<br /> i
<br /> 3201337B/CAP AMD DOC November 30, 1995
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