Notes
Exhibit 326 (AR 020641–020643) contains reference data entries for Aroclor 1254 (CAS Registry No. 11097-69-1), a polychlorinated biphenyl (PCB) mixture with molecular weight 327–328.4 and chlorine content 54%. Data includes water solubility (0.012–0.056 mg/L at 20–25°C), vapor pressure (0.0001–0.043 Pa at 20–38°C), Henry’s Law constants (16.60–82.0 Pa·m³/mol), octanol/water partition coefficient log Kow (6.03–6.72), sorption partition coefficient log Koc (4.74 soil/sediment), bioconcentration factors (log BCF 3.00–6.50 across fish, shellfish, birds, mammals), half-lives in surface water (~10 hours volatilization), and biotransformation/biodegradation rate constants. Sources cited include Mackay, Brinkman & De Kock 1980, Metcalfe et al. 1988, Monsanto 1972/1973, NAS 1979, Mabey et al. 1982, Murphy et al. 1987, Veith et al. 1979, and others. Filed as exhibit in PCHB Third Runway EIS proceedings.