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4% mom ME <br /> Table 4(continued) <br /> Site Parameters For Former Safeway Meat Packing Plant Stockton California <br /> Receptor IndustnallCommencal <br /> )ndustrial/Commerical Comment on Site Specific Parameter Values <br /> Symbol Parameter Units RME Average <br /> — <br /> 5 <br /> Ground Water Darcy Velocity cmlyr 6 24 4 73 Calculated values In March 1995 the groundwater gradient(1)wa <br /> 0 006 From USEPA(1988)a representative hydraulic <br /> conductivities(K)for a sandy clay is 3 3E 5 cmis and for a silty <br /> clay is 2 5E 5 cmis velocity was estimated as K'I <br /> j W Width of Source Area Parallel to Wind or cm 1500 1200 Estimated distance between borings B 76 assumed to be at edge <br /> Groundwater Flow Direction of over excavation operation and center of Navy Drive is 1200 cm <br /> (45 to, 1500 cm(55 It)is the ASTM default value <br /> delta air Ambient Art Mixing Zone Haight cm 200 200 2 meters(200 cm)is the approximately top of the breathing zone <br /> this is ASTM default value <br /> delta gw Groundwater Mixing Zone Thickness cm 200 200 No site specific data ASTM default value used <br /> nu Areal Fraction of Cracks in Foundation/Wall cm`2 crackslcm'2 total NIA N/A Not applicable to Safeway site there is no budding in area of <br /> area concern <br /> theta acap Volumetric Air Content in Capillary Fringe Sorts cm'3 air/cm'3 soil 0 038 0 046 Assumes 90%saturation of capillary fringe soil this is the same <br /> assumption as ASTM default value <br /> theta acrack Volumetric Air Content in FoundationlWall cm'3 air/cm'3 total NIA NIA Not applicable to Safeway site there is no building in area of <br /> cracks volume concern <br /> theta as Volumetric Air Content in Vadose Zone Soil cm'3 air/cm'3 sail 026 023 Boring logs indicate that the vadose zone soil is moist Based on <br /> this comment it has been assumed that the sod is at field capacity <br /> i e,aU free water is drained&about 112 of pore space is filled wit <br /> water <br /> theta T Total Soil Porosity cm"31cm"3 sod 038 046 Average case is mean total porosity for a silt sod IMdls et al <br /> 1985) RME is the ASTM default value <br /> theta wrap Volumetric Water Content in Capillary Fringe cm'3 H2O1cm'3 soil 0 342 0 414 Assumes 90%saturation,same assumption as ASTM default value <br /> Soil <br /> theta wcrack Volumetric Water Content in Foundation/Wall cm'3 H2OIcm'3 total NIA NIA Not applicable to Safeway site there is no building in area of <br /> Crack volume concern <br /> theta ws Volumetric Water Content in Vadose Zone Soil cm'3 H2O1cm"3 soil 0 12 023 Boring logs indicate that the vadose zone soil is moist Based on <br /> this comment it has been assumed that the sod is at field capacity <br /> I a all free water is drained&about 112 of pore space is filled with <br /> water <br /> rho s Sod Bulk Densely g sod/cm'3 sod 1 7 1 38 Average case bulk density is the mean density for silt sods(Mills et <br /> al 19851,RME is the ASTM default value <br /> tau Avera en Time for Vapor Flux s 7 88E+08 7 86E+08 Avera ling time is 25 years expressed in seconds <br /> x lmarkMSAFEWAY2 XLW Page 2 of 2 2126196 <br />