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Manufactured Stormwater Treatment Measure Maintenance Plan for <br />601 EL CAMINO REAL <br />JUNE 15, 2018 <br />Manufactured Stormwater Treatment Measures are PROPRIETARY treatment devices that tend to <br />be installed below ground and operate using some type of proprietary filter media, hydrodynamic <br />separation, or sedimentation and screening. Common examples of manufactured treatment <br />measures include manufactured media filters, inlet filters or drain inserts, oil/water separators and <br />hydrodynamic separators. In August 2004, the Regional Water Board's Executive Office wrote a <br />letter stating that a project relying on inlet filters or oil/water separators as the sole treatment <br />measure would be unlikely to meet the maximum extent practicable standard of the National <br />Pollutant Discharge Elimination System Permit. See the Countywide C.3 Technical Guidance <br />(www.flowstobay.ora) for more information. <br />Project Address: 601 EL CAMINO REAL, REDWOOD CITY, CA 94063 <br />Assessor's Parcel No,: 052-271-010&052-271-D20 <br />Property Owner. KB HOMES SOUTH -BAY Phone No.: 925-983-4600 <br />Designated Contact: CHRISTOPHER MOI Phone No.: 925-983.4522 <br />Mailing Address: 50M EXECUTIVE PARKWAY SAN RAMON, CA 94583 <br />The property contains 1 media filter, located as desodbed below and as shown in the attached <br />site plan'. <br />• OldCastle Stormwater Solutions, Perk Filter 4' Wide Concrete Vault, (3-12" Cartridges) <br />located at the property line near Hopkins Avenue. <br />I. Routine Maintenance Activities <br />The principal maintenance objective is to prevent sediment buildup and clogging, which <br />reduces pollutant removal efficiency and may lead to failure of the manufactured treatment <br />measure. Routine maintenance activities, and the frequency at which they will be <br />conducted, are shown in Table 1. <br />No. <br />Table 1 <br />Routine Maintenance Activities for Manufactured Treatment Measures <br />Maintenance Task <br />1 Inspect for standing water, sediment, trash and debris. <br />2 Remove sediment, fresh and debris from sedimentation <br />basln, riser pipe and filter bed, using vector truck method. <br />Dispose of sediment trash, filters and debris property. <br />3 Ensure that manufactured treatment measure drains <br />completely within five days. <br />4 Inspect outlets to ensure proper drainage. <br />5 Follow manufacturers guidelines for maintenance and <br />cartridge replacement <br />6 Inspect manufactured treatment measure, using the <br />attached inspection checklist <br />Frequency of Task <br />Monthly during rainy season <br />As needed <br />After major storm events and as <br />needed. <br />Monthly during rainy season, or as <br />needed after storm events <br />As per manufacturers specifications <br />Monthly, or after large storm events, <br />and after removal of accumulated <br />debris or material <br />'Attached siteplan must match the site plan exhibit to Maintenance Agreement <br />Page 1 <br />%iiiW,188.1341601 El Camino STMMA <br />Updated 7/1/10 <br />