84-003 ORD PROVIDING CODE OF ORDINANCES BE AMENDED BY REVISING CHAPTER 31 SECTIONS 31-37 THROUGH SECTION 31-43 OF SAID CODE

Home Browse Search

CHARGE RATES FOR EXCESSIVE SURCHARGE SCRBOD5 Charge SCR TSS Charge dollars/mg/1/million gallons $ .7339 $ .5712 (4) Calculation of excessive strength surcharge: SC- [(BOD5 mg/1 - 250 rng/1) SCRBOD 5 + (TSS mg/1 - 250 mg/1) SCRTSSI X MG Where : SC = Surcharge BOD5 mg/1 = Average user BODS for surcharge calculation 250 mg/1 = allowable BOD5 and total suspended solids con- centration without surcharge SCRBOD = 5 charge rate for BOD5 TSS mg/1 = Average user TSS for surcharge calculation MG = User wastewater contribution in million gallons for the month or the user water usage whichever is applicable. SCRTSS - charge rate for TSS NOTE: The SCRSS and SCRBOD5 are rates based on one (1) mg/1 in one (1) million gallons of wastewater. (5) Shortened capacity life surcharge: Since BOD and SS concentrations in excess of 250 mg/1 will tena to use up the capacity of the treatment plant, there is a cost incurred for the shortened useful capacity of the treatment plant, which shall be recovered as follows : a. Determination of monthly average BOD5 of the treatment plant influent through twenty-four hour composite sampling and lab analysis reported in pounds per day. b. Using a predetermined strength for normal domes- tic wastewater from the City of Paris, Paris, Texas, industrial contribution will be determined by calculating the difference between the actual BOD and SS received and the amount that should have been received according to normal domestic strength. c. Each month, using the plant design capacity, the amount in excess of normal domestic wastewater will be determined as a percentage of plant capacity; percentage will be assumed to be the reduction in useful plant capacity life, to be converted to years using plant design criteria. 18