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Table 1
<br /> Residual Target Compounds
<br /> Physical and Chemical Characteristics
<br /> Chevron U.S.A.Service Station 9-6171
<br /> 6633 Pacific Avenue
<br /> Stockton,California
<br /> Parameters Benzene Toluene Eth (benzene Xylenes
<br /> Toxicity Exposure Routes:inhalation,dermal,and Exposure Routes:inhalation,dermal,and Exposure Routes:Inhalation,dermal,and Exposure Routes:Inhalation,dermal,and
<br /> inoestion. ingestion. ingestion. ingestion.
<br /> Exposure Duration and Effects Exposure Duration and Effects:
<br /> Exposure Duration and Effects: Exposure Duration and Effects: short e -upper respiratory,eye,and short to -upper respiratory,eye,and
<br /> short term-upper respiratory,eye,and short e -upper respiratory,eye,and dermal irritation,pulmonary changes dermal Irritation,impaired memory
<br /> dermal irritation; dermal irritation,depresses central nervous long term-reproductive effects and respi- long to -effects on nervous system,
<br /> long term-carcinogen. system ratory problems liver,lungs,and heart.
<br /> Iona to -kidney and liver damage
<br /> Persistence Soil:rapid volatilization near surface, Soil:will evaporate near-surface or be lost Soil:absorption is minimal,absorbed frac- Soil:will evaporate and leach Into ground-
<br /> highly mobile in soil and may leach to by microbial degradation,mobile in soil and tion will leach Into groundwater especially water,degrades under aerobic or anaerobic
<br /> groundwater,will biodegrade. will leach to groundwater where slow biode- in low organic soils,evaporate,or slowly denitrifying conditions,rates depend on
<br /> gradation will occur, biodegrade, concentration,residence time,soil type, p
<br /> Water:will volatilize and biodegrade and microbial population.
<br /> Water.will volatilize and biodegrade, Water.will volatilize or biodegrade(rate
<br /> Vapor:will remain in vapor phase due to dependent on water temperature,mixing due to turbulence and microbial popula- Water.will volatilize and biodegrade,
<br /> high vapor pressure,subject to biodegra- conditions,and the existence of microbial tions) dependent on water temperature,mixing
<br /> dation. Chemical degradation half life of populations, conditions,and the existence of microbial
<br /> hours to weeks 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 degradation Vapor.w111 remain in vapor phase due to
<br /> zone biodegradation,chemical degradation In the atmosphere as for benzene. high vapor pressure.Subject to vadose
<br /> In the atmosphere as for benzene, zone biodegradation,chemical degradation
<br /> in the atmosphere as for benzene.
<br /> Transport Relatively mobile in vapor and groundwa- Relatively mobile In vapor and groundwa- Relatively mobile in vapor and groundwa- Relatively mobile in vapor and groundwa-
<br /> ter, relatively immobile in soil: ter,relatively Immobile in soil: ter,relatively immobile In soil: ter,relatively immobile In soil:
<br /> Water Solubility 1791 mg/I Water Solubility 534.8 mg/I Water Solubility 161 mg/l Water Solubility 175 mg/l
<br /> Vapor Pressure 95.19 mm Hg Q25°C Vapor Pressure 28.4 mm Hg Q25°C Vapor Pressure 9.53 mm Hg @25°C Vapor Pressure 6.6 mm Hg Q25°C
<br /> Henry's Law:5.43 x 10-3 atm x m 3/mole Henry's 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 Low:5.1 x 10-3 atm x m 3/mole
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