ARCHIVED REPORTS_RPT OF WASTE DISCHARGE FOR WASTEWATER DISPERSAL 2011

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APPENDIX B Diamond Pet Food Processors of Ripon,LLC June 30,2011 Report of Waste Discharge—Groundwater Modeling Page 3 of S Table B-1: Summary of Aquifer Properties Used for Model Upper` Intermediate Property Semiperched= Aquitard Aquifer Aquitard Aquifer Aquifer(Layer 1)_ (Layer 2) (Layer 4) (Layer 3) (Layer 5) Kx,feet/day 45 4 651 4 88 KZ,feet/day 2.5- 0.4 4.0 0.4 4.4 Horizontal anisotropy 1 = 1 1 1 1 Vertical anisotropy 20- 1 20 1 20 Specific storage, Ss, 1/foot 0.02= 0.001 0.002 0.001 0.00046 Specific yield, Sy, percent 0.2- 0.1 0.2 0.1 0.2 Longitudinal dispersivity 100 10 100 10 100 Porosity 0.3 0.45 0.3 0.45. 0.3 Hydraulic conductivity and specific storage is based on site specific testing of production wells. Horizontal anisotropy was assumed to be absent; the vertical anisotropy was adjusted as part of model calibration. Specific yield and porosity were assumed based on typical published values for the various sediment types. Dispersivity was assumed to be relatively high, as the modeling efforts were directed to large-scale effects. SOURCES AND SINKS Six types of sources/sinks were defined for the model—recharge, evapotranspiration, specified-head, river, wells, and concentrations. Recharge boundaries in the form of precipitation and applied water were set for the uppermost layer of the model. Recharge values for precipitation were based on precipitation measured at Ripon. Figure B-2 shows the measured precipitation and evapotranspiration for the Ripon station. Recharge of applied water was based on data supplied by Diamond for their proposed discharge,plus the anticipated cogen discharge (both before and after water-cooling ceases at the cogen facility). 010107.00, Task I Lawrence&Associates w:Iclientsldiamondpetfoods1010107.00-riponrowdldiamondpet rowd_june2011 draft.docx