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6.Q. - Page 13 of 17 <br />IMPERVIOUS SURFACE: Shall mean <br />paties, driveways, and parking lots where SUGh surfaGes are nOt GonStWGted <br />ous materials and/or are Ret designed to have zero stormwater disGharge. A <br />surface covering or pavement of a developed parcel of land that prevents the land's <br />natural ability to absorb and infiltrate rainfall/stormwater. Impervious surfaces include, but <br />are not limited to: roof tops; walkways; patios; driveways; parking lots; storage areas; <br />impervious concrete and asphalt; and any other continuous watertight pavement or <br />covering. Landscaped soil and pervious pavement, including pavers with pervious <br />openings and seams, underlain with pervious soil or pervious storage material, such as <br />a gravel layer sufficient to hold at least the volume of rainfall runoff, as defined in Provision <br />C.3.d of the MRP, are not impervious surfaces. Open, uncovered retention/detention <br />facilities are not considered impervious surfaces for purposes of determining whether a <br />project is a C.3 Regulated Project as defined under Provisions C.3.b and C.3. of f the <br />MRP. Open, uncovered retention/detention facilities shall be considered impervious <br />surfaces for purposes of runoff modeling and meeting the hydromodification standard as <br />defined in Provision C.3.a.ii of the MRP. <br />PERMANENT STORMWATER POLLUTION PREVENTION MEASURES (PSPPM): <br />Shall mean any source control measures, site design measures, and/or stormwater <br />treatment measures, or combinations thereof that reduce stormwater pollution to the <br />maximum extent praGticahle as required by Order R2-2003 0023 2015-0049 in NPDES <br />Permit No. CAS029921 CAS612008 issued by the SRWGB RWQCB, San Francisco Bay <br />Region, as it may be amended from time to time. The design and implementation of the <br />PSPPM must be in accordance with the guidelines and technical specifications provided <br />by the City or other City -approved authority and the requirements of Order No. R2-2003- <br />0023 2015-0049. The design and implementation of the PSPPM must also incorporate <br />Green Infrastructure desianed to limit contributions of urban runoff D011utants to San <br />Francisco Bay per the MRP. <br />ATTY/ORD.488/CC ORDINANCE AMENDING CHAPTER 18 & 27A—GREEN INFRASTRUCTURE <br />REV: 06-20-19 PR <br />Page 5 of 9 <br />211 <br />11p) <br />ic <br />A <br />- <br />r <br />WPM <br />- - <br />-!-I <br />ATTY/ORD.488/CC ORDINANCE AMENDING CHAPTER 18 & 27A—GREEN INFRASTRUCTURE <br />REV: 06-20-19 PR <br />Page 5 of 9 <br />211 <br />