Item A - PH on MWMC/Metro Plan - Laserfiche WebLink

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File Number: 55999 Page 4 of 26 page~ This p~rmit contains'either technology or water quality based effluent limits for those parameters "i discharged by the permittee that the Department has determined require effluent limitations to comply With the water quality standards found m OAK 340-4~-445 outside the above mixing {ones. The limits · were established on the basis of the information provided by the permittee'and following the · Department's rules, including OAR 340-41-026. Other Parameters. also were identified in the permittee's application for which the Department.did not e'stablisl'/effluent limitations. The D~partment has · determined that those paNmeters do not present a reasonable potential to violate applicable water quality standards. The permittee is required to notify the department if changes occur in its processes or influent stream which could signifidantly change the effluent stream for/my of those parameters. b. Reclaimed Wastewater Outfall 101 and Outfall 102 (See Note 8) (1) No discharge to state waters is permitted. Ail reclaimed water reuse shall prevent: a: Prolonged ponding of treated reclaimed water on the ground surface; ' · . . b. Surface runoff0r subsurface drainage.throughdrainage tile; · . c. The creation of odors, fly and.mosquito breeding or other nuisance conditions; .... d. The overloading of land with nutrients, organics, or other pollutant parameters; and, e. Impairment of existing or reasonabl, y probable'beneficial uses of groundwater. :. (2)' oUffall 101 . Prior to reuse of the reclaimed, water, it shall receive at least Level II treatment as defined in OAK 340-55 to: Reduce Total Coliform to 240 Organisms per 100 mi in two consecutive ' .. samples, and a 7-day mediah of 23 organisms per 100 nfl. (3) Outfal1102 Prior to rede of the reclaimed water, it shall receive at least · Level m' t/eatrn~nt as defined in OAK 340-55 to: : Reduce Total Coliform to a 7-day median of 2.2 orgakisms per 100 mL and maximum of 23 organisms per 100 nfl. (4) .Irrigation shall conform to the irrigation, management plan approved by the Department in accordance with OAK 340-55 for agricultural, commercial or inddstrial use. e. Emergency (5verfiow Outfalls 002 through 014: (1) No wastes shall be discharged from these ouffalls and no activities shall be conducted which violate water quality standards as adopted in OAR 340-41,0445, unless the cause of the discharge is due to storm events as allowed under OAK 340-41-120 (13) or (14) as follows: (2) Riw sewage.diseh.arges are prohibited to waters of the State f~m November 1 through May 21, except dur_i.'ng a .~torm event greater than the one-in-five-year, 24-hour duration storm, and from May 22 through October 31, except during a storm event greater than the one-in- ten-year, 24-hour duration storm. If an overflow occurs between May 22 and June 1, and if the permittee demonstrates to the Department's satisfaction that no increase in risk to beneficial uses occurred because of the overflow, no violation shall be triggered if the storm associated with the overflow was greater than the one-in-five-year, 24-hour duration storm. 4-28