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requirement in existing ordinances shall develop and <br />implement criteria to determine when it is infeasible for a <br />project to meet this requirement', including but not <br />limited to: <br />Site/Engineering-based conditions such as soils that <br />do not allow for infiltration of the required volume <br />of stormwater runoff; proximity to a known <br />hazardous waste site or landfill; proximity to a <br />drinking water well or spring; proximity to an onsite <br />sewage system or underground storage tank; <br />setbacks from structures; landslide hazard areas or <br />slopes; seasonal high groundwater; incompatibility <br />with the surrounding drainage system from <br />elevation or location; areas prone to erosion. <br />• Incompatibility with uses related to concerns such <br />as public safety, protection from spills, <br />contaminated sites, or frequently flooded areas. <br />• Incompatibility with state or federal laws. <br />• Permittees shall submit to Ecology with the Annual <br />Report due no later than March 31, 2018 a summary <br />of the criteria defining infeasibility, or a citation for <br />the criteria adopted pursuant to a regional LID <br />manual. <br />(3) To meet the requirements of Appendix 1, Core Element <br />#5 (Runoff Treatment) and Core Element #6 (Flow <br />Control), Permittees may choose to apply the definitions <br />and requirements in Chapter 2.2.5 and 2.2.6 of the <br />Stormwater Management Manual for Eastern <br />Washington (2004), or portions thereof, and the methods <br />described in Chapters 4 and 6 of the Stormwater <br />Management Manual for Eastern Washington (2004), or <br />another technical stormwater manual approved by <br />Ecology. <br />(c) The ordinance or other regulatory mechanism shall include <br />requirements to ensure adequate ongoing long-term operation <br />and maintenance of the BMPs approved by the Permittee. <br />(d) Permittees shall document how the requirements of the <br />ordinance or other regulatory mechanism protect water quality, <br />3 Ecology issued a grant in 2012 to work with Permittees to develop an Eastern Washington LID Manual. Permittees <br />may choose to meet this requirement by adopting the criteria developed in that process. <br />Eastern Washington Phase HMunicipal Stormwater Permit —August 1, 2014 <br />Page 23 <br />