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r <br /> Table 6 <br /> rInput Parameters and Assumptions <br /> MQDFLQW and MT3D Models <br /> ' Chapin Brothers Investments, Inc <br /> 1766 Monte Diablo Avenue <br /> Stockton, California <br /> Page 2 of 2 <br /> Input Parameter Value Units Source/Coments <br /> U j Horizontal transverse <br /> dispersrvrtyllongttudal dispersivfty 01 No units Bennet&Zheng,Applied Contaminant Transport Modeling,2002 <br /> 1--, (TRPT) <br /> cr) Vertical transverse <br /> ~ dispersivity/longitudal dispersivity 001 No units Bennet&Zheng Applied Contaminant Transport Modeling 2002 <br /> ' (TRPV) <br /> Q) <br /> as <br /> Longitudal dtspersivety 10 feet Bennet&Zheng Applied Contaminant Transport Modeling,2002 <br /> r c <br /> a <br /> CL Effective molecular diffusion <br /> ' coefficient(DMCOEF) 1 60E-OB ft2/sec C W Fetter,Contaminant Hydrogeology, 1993 <br /> D <br /> Bulk density of pourous medium in 3 AT123D Manual,table pg 9,typical value for silt/sand <br /> U aquifer(RHOS) 4247 kg/ft (1500 kg/m3),Yeh <br /> F— <br /> ' Kd=K,�f%�, Kai obtained from USEPA, Soil Screening Guidance User's <br /> cn Distribution coeffient(Kd)- 3 Guide,Table C-1 Chemical-Specific Properties used in SSL <br /> benzene 2 OBE-02 ft lk9 Calculations f.. value obtained from Bennet&Zheng,Applied <br /> Contaminant Transport Modeling,2002 <br /> c <br /> 0 <br /> First order rate constant for the USEPA Calculation and Use of First-Order Rate Constants for Monitored <br /> o� dissolved phase(RC1) 3 67E-08 11sec Natural Attenuation Studies,Table 2, pg 7,typical BTEX value(315 days <br /> ca <br /> r a <br /> U <br /> E <br /> aD First order rate constant for the USEPA,Calculation and Use of First-Order Rate Constants for Monitored <br /> ' r 367E-08 1/sec <br /> U sorbed phase(RC2) Natural Attenuation Studies,Table 2, pg 7,typical BTEX value(315 days) <br /> r <br /> r <br /> r <br /> r <br />' r <br />