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B. Provide a description of the injection unit. <br />(1) Name: Green River — R1, Green River — LO, and Green River — RO Zones <br />(2) Depth (drilled): 2,256 feet (ft) below ground surface (bgs) <br />(3) Thickness: 1,975 — 2,250 ft bgs; 275 ft <br />(4) Formation fluid pressure: Expected to be equivalent to hydrostatic pressure which has not been <br />directly measured because the formation yields groundwater to the well at a very low rate (less than <br />0.01 gallons per minute). <br />(5) Age of Unit: Eocene <br />(6) Porosity: variable; generally up to approximately 0.2 based on porosity measurements obtained by <br />Schlumberger® using the Platform ExpressTM integrated wireline logging tool. Please see AMSO's August <br />15, 2011 submittal to Wendy Cheung (EPA), Travis Marshall (DRMS), and Kent Walter (BLM) regarding <br />the step rate test conducted at well TM -1 and resistivity and porosity logs for well BH -1. <br />(7) Permeability: Permeability of the formation has been estimated via the pressure buildup curves in <br />shut -in wells and is approximately one microdarcy. <br />(8) Bottom hole temperature: 104° F. <br />(9) Lithology: See stratigraphic section presented above in Section I.1.A. for the test retort interval <br />(injection zone) consisting of the R1, LO, and RO Iithologic zones. <br />(10) Bottom hole pressure: 917 pounds per square inch (psi) as reported for the step rate test conducted <br />at well TM -1. Please see AMSO's August 15, 2011 submittal to Wendy Cheung (EPA), Travis Marshall <br />(DRMS), and Kent Walter (BLM) regarding the step rate test conducted at well TM -1 and resistivity and <br />porosity logs for well BH -1. <br />(11) Fracture pressure: greater than 1,068 psi based on the step rate test conducted at well TM -1. <br />Please see AMSO's August 15, 2011 submittal to Wendy Cheung (EPA), Travis Marshall (DRMS), and Kent <br />Walter (BLM) regarding the step rate test conducted at well TM -1 and resistivity and porosity logs for <br />well BH -1. <br />C. Provide chemical characteristic of formation fluid (attach chemical analysis). <br />At well T -1P (the injection well), groundwater samples have not been collected from the retort test <br />interval (injection zone) which consists of very low permeability shale and yields groundwater to the <br />well at very low rates (less than 0.01 gallons per minute). As reported in the Statement of Basis of AMSO <br />UIC Permit, a total dissolved solids (TDS) concentration of 10,400 mg /L was reported for a grab sample <br />collected from an adjacent well (TM -1) located within approximately 75 feet of T-1P and completed <br />within the R1 Iithologic zone. <br />D. Provide a description of freshwater aquifers. <br />(1) Depth to base of fresh water (less than 10,000 mg /L TDS): The base of the L3 hydrostratigraphic unit, <br />the lowest USDW at the site, is approximately 1,830 ft bgs. <br />