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Anary Environmental Assessment Report <br /> Pittman Elementary School,Stockton,CA <br /> December 10,2003 <br /> Page 24 <br /> • Table 17-Summation of Risk and Hazard For All Constituents Of Potential Concern excludin Lead <br /> From calculations based on the PEA Guidance From calculations based on the Johnson&Ettinger Model <br /> soil gas andgroundwater) <br /> Chemical Risk Hazard Chemical Risk Hazard <br /> Barium NC 1.89E-01 Acetone NC 8.00E-04 <br /> Beryllium 5.69E-08 1.15E-02 Benzene 2.80E-07 3.80E-04 <br /> Cadmium 2.79E-07 1.01E-02 1,3-Butadiene 4.30E-06 2.90E-03 <br /> Chromium III NC 9.13E-04 2-Butanone(Methyl Ethyl Ketone NC 3.70E-05 <br /> Chromium VI 5.70E-06 2.82E-02 Carbon Disulfide NC 6.90E-06 <br /> Cobalt 1.90E-06 1.64E-01 Chloroform 3.40E-09 5.00E-06 <br /> Copper NC 2.43E-02 13-Dichlorobenzene NC 9.90E-06 <br /> Nickel 5.15E-07 5.36E-02 1 2-Dichloroethane 8.20E-08 2.30E-05 <br /> Vanadium NC 2.62E-01 Ethyl Benzene NC 8.50E-06 <br /> Aldrin 4.40E-08 6.41E-04 Hexane NC 1.60E-04 <br /> alpha-BHC 5.21E-09 2.98E-05 Methyl tertiary-Butyl Ether 1.00E-08 3.00E-05 <br /> beta-BHC 2.86E-09 7.36E-05 Methylene Chloride 1.00E-08 6.10E-05 <br /> delta-BHC* 1.21E-08 NC Propylbenzene NC 1.40E-05 <br /> gamma-BHC 3.58E-09 8.38E-05 Tetrachloroethene 1.70E-07. 1.90E-03 <br /> al ha-Chlordane** 3.63E-07 4.32E-03 Toluene NC 1.80E-04 <br /> Chlorobenzilate 8.00E-09 1.10E-05 Trichloroethene 1.50E-09 2.90E-06 <br /> DDD 3.49E-10 NC 111-Trichloroethane NC 1.50E-05 <br /> • DDE 2.18E-08 NC 1 2 4-Trimeth lbenzene NC 1.60E-03 <br /> DDT 4.29E-08 1.97E-03 1 3 5-Trimeth lbenzene NC 4.60E-04 <br /> Dieldrin 4.30E-06 4.00E-02 -X lene NC 3.10E-04 <br /> Endosulfan II*** NC 2.22E-06 o-X leve NC 11.20E-04 <br /> Endrin Aldehyde NC NC I Summation soil as and roundwater 4.86E-06 9.02E-03 <br /> Endrin Ketone NC NC <br /> Heptachlor 3.11E-08 1.13E-04 Risk Hazard <br /> Heptachlor Epoxide 2.28E-07 2.37E-02 Summation soil 1.35E-0518.15T-01 <br /> Methoxychlor NC 1.74E-05 Summation soil as and oundwater 4.86E-06 9.02E-03 <br /> Summation(soil) 1.35E-OS 8.15E-01 Summation soil,soil gas,andgroundwater) 1.84E-OS 8.24E-01 <br /> Data based on highest concentration of COPC. <br /> NC=Not calculated due to lack of toxicity data <br /> *BHC-technical toxicity data was used for delta-BHC. <br /> **Chlordane toxicity data was used for alpha-chlordane and gamma-chlordane. <br /> ***Endosulfan toxicity data was used for endosulfan 11. <br /> 8.2.5 Lead <br /> Hazard from exposure to lead was evaluated using the Leadspread 7 Model developed by DTSC. This <br /> model is a spreadsheet analysis that uses various conservative assumptions about exposure pathways to <br /> calculate a probability matrix for blood levels in four receptors: adult, child, pica child, and industrial. <br /> Input parameters are lead in air (µg/ma), lead in soil [micrograms per gram (ltg/g)], lead in water <br /> 0 [micrograms per liter (µg/L)], homegrown produce (%), and respirable dust (µg/m3). The model also <br /> 4M lkk-�6 <br /> i, CONDOR <br />