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1 is a summary that shows the estimated mass of each of the additives needed to adjust <br />the pH of the approximately 35 million gallons of C-Pit water to values of 10, 9, and 8. <br />Additive Ad'usted H Cost Range <br />Quanti 10 9 8 $ <br />H2SO4 (tons) 146 215 245 13,000 - 22,050 <br />COZ Gas (tons) 73 143 242 8,000 - 26,600 <br />HCI tons 305 453 527 31,000 - 52,700 <br />NaHSO4 (tons)° 336 493 559 168,000 - 251,550 <br />Nahcolite (tons) 400 2099 17495 20,000 - 874,750 <br />Na[es: <br />=based on 93 wt % H2SO4; 15.02 Ibs/gal; $90 per ton by rail from Utah <br />~ =based on $110 per ton from Walden, Colorado <br />a =based on 32 wt % HCI; 9.68 Ibs/gal; $100 per ton by rail from Louisiana <br />° =based on $ 450 per ton from Ohio <br />s = nahcolite is natural sodium bicarbonate; short tons; based on <br />$ 50 per ton by rail from Wyoming <br />Table 1. Summary of the Amount and Estimated Cost of Additive Required to Adjust 35 Million <br />Gallons of C-Pit Wa[er to pH 8, 9, and 10. <br />3 Treatment Plan Options <br />Two treatment plan options were developed to treat the ponded C-Pit water. Option 1 is <br />developed to treat the approximately 35 million gallons of water currently ponded in C- <br />Pit. Option 1 will only be implemented if CEMEX is not successful in dewatering the <br />pond to its smallest practical volume by December 1, 2005. Option 2 is developed to <br />treat the residual C-Pit water that may remain after CEMEX has reduced the pond to its <br />smallest practical volume by December 1, 2005. Both options were developed using <br />amendments that are equally effective, but avoid the health, safety, and handling <br />concerns posed by the use of large quantities of liquid acid (e.g., sulfuric or <br />hydrochloric). If water treatment using either of these options becomes necessary, <br />CEMEX will implement the appropriate option within 90 days after it is determined that <br />treatment is needed. The 90-day period will provide CEMEX the time needed to prepare <br />a final design, procure the equipment and supplies, and install and test the system. <br />CEMEX Wa[er Treatment Plan 5 Revision 0 <br />