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<br />, <br /> <br />Vegetated Buffer Strip Maintenance Plan for <br />Costco Wholesale - Redwood City <br /> <br />April 4, 2008 <br /> <br /> <br />Vegetated Buffer Strips are <br />vegetated surfaces that are <br />designed to treat sheet flow from <br />adjacent surfaces. They function <br />by slowing runoff velocities and <br />allowing sediment and other <br />pollutants to settle and by <br />providing some infiltration into <br />underlying soils. <br /> <br />Project Address and Cross Streets 2300 Middlefield Road. Redwood Citv. CA <br />Middlefield & Willow <br /> <br />Assessor's Parcel No.: <br />Property Owner: <br />Designated Contact: <br />Mailing Address: <br /> <br />053-390-010 and -020 <br /> <br />Costco Wholesale <br />Ed Navarro <br /> <br />Phone No.: (425) 313-8100 <br />Phone No.: (425) 313-8100 <br /> <br />999 Lake Drive. Issaauah. WA 98027 <br /> <br />The property contains 1 vegetated buffer strip, located as described below and as shown in the <br />attached site plan: <br /> <br />. Vegetated Buffer Strip No. 5 is the landscaped area along the entire property frontage <br />along Middlefield Road from the back of sidewalk to the back of the street curb. <br /> <br />I. Routine Maintenance Activities <br /> <br />The principal maintenance objective for vegetated buffer strips is to achieve the pollutant <br />removal efficiency of the buffer strip, as designed, by maintaining a dense, healthy <br />vegetated cover. Routine maintenance activities, and the frequency at which they will be <br />conducted, are shown in Table 1. <br /> <br /> Table 1 <br /> Routine Maintenance Activities for Vegetated Buffer Strips <br />No. Maintenance Task Frequency of Task <br />1 Mow turf grass to (Not Applicable). Remove grass Not Applicable. <br /> cuttings. Avoid producing ruts when mowing. <br />2 Irrigate during dry weather. As needed. See 11-3 below. <br />3 Remove obstructions and trash from vegetated buffer strip Monthly, or as needed <br /> and dispose of properly. <br />4 Inspect buffer strip to check for erosion and sediment and Twice a year: 1) one inspection at <br /> debris accumulation. Dispose of sediment and debris the end of the wet season in order to <br /> properly. plan and schedule summer <br /> maintenance, 2) the other inspection <br /> after periods of heavy runoff. <br /> <br />Z:\'2004\A04597\SWQCPtO&N AGREEMElm6.2_E'\IlIa'_Strip_templ~_FINAL_12~01,do~ <br /> <br />Page 1 <br /> <br />NOS Approved 1215107 <br />EXHIBIT B, SHEET 19 <br />