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Response and Cleanup of Sulfuric Acid Spill POSDEF Power Company,L.P. 2526 W.Washington St. Stockton,CA.95203 Page 2 of 7 Amount of Acid Loss: In reviewing our readings of the sulfuric acid tank we have determined that the total amount of sulfuric acid released onto the ground from 12:30 p.m. on Friday, July 14, 1995, to 8:00 a.m., Sunday, July 16, 1995, was less than approximately 216 gallons. Using the change in tank level divided by time, we were able to calculate the rate of acid flow from the tank. The rate was determined to be 4.96 gallons per hour. Due to the delivery of acid on Friday and the increase in head pressure of sulfuric acid on the tank and the associatedtransfer lines we assumed that the weakened pipe probably failed resulting in a leak at or about 12:30 p.m. on Friday July 14, 1995. With a total of 43.5 hours from beginning to end at a rate of 4.96 gallons per hour we have determined the amount removed from the tank to be 216 gallons. A portion of the 216 gallons of sulfuric acid which left the storage tank did not leak out of the pipe, but instead was used in the system for pH adjustment in our cooling system and reverse osmosis unit. This was determined by adding the number of times the auxiliary operators at the plant transferred acid (nine transfers)to a 10 gallon day tank for pH adjustment in the cooling system (see auxiliary operator log). The quantity of acid calculated to be consumed, as opposed to spilled, in the cooling system is calculated to be, nine times ten(9 transfers x 10 gallons/transfer= 90 gallons), or ninety (90) gallons. No acid was transferred to the 10 gallon storage tank for the reverse osmosis units and therefore is not entered into this calculation. Therefore, we have concluded that the amount of acid spilled onto the ground is 126 gallons (216 gallons - 90 gallons= 126 gallons).