Laserfiche WebLink
Bioretention Areal Maintenance Plan for <br /> Costco Fuel Facility Expansion <br /> April 11, 2016 <br /> Project Address and Cross Streets: 1900 Davis Street, San Leandro, CA 94577/Davis <br /> Street and Beecher Street <br /> Assessor's Parcel No.: 79A-409-13 <br /> Property Owner: Phone No.: <br /> Designated Contact: Ken Wootten Phone No.: (510) 562-6708 <br /> Mailing Address: <br /> The property contains one (1) bioretention area, located as described below and as shown <br /> in the attached site plane. <br /> ■ Bioretention Area No. 1 is located within a landscape island east of the fueling facility. <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 bioretention area failure. Routine <br /> maintenance activities, and the frequency at which they will be conducted, are shown in <br /> Table 1. <br /> Table 1 <br /> Routine Maintenance Activities for Bioretention Areas <br /> No. Maintenance Task Frequency of Task <br /> 1 Remove obstructions, debris and trash from bioretention Monthly, or as needed after storm <br /> area and dispose of properly. events <br /> 2 Inspect bioretention area to ensure that it drains between Monthly, or as needed after storm <br /> storms and within five days after rainfall. events <br /> 3 Inspect inlets for channels, soil exposure or other Monthly, or as needed after storm <br /> evidence of erosion. Clear obstructions and remove events <br /> sediment. <br /> 4 Remove and replace all dead and diseased vegetation. Twice a year <br /> 5 Maintain vegetation and the irrigation system. Prune and Before wet season begins, or as <br /> weed to keep bioretention area neat and orderly in needed <br /> appearance. <br /> 6 Check that mulch is at appropriate depth (3 inches per soil Monthly <br /> specifications)and replenish as necessary before wet <br /> season begins. <br /> 7 Inspect bioretention area using the attached inspection Monthly, or after large storm events, <br /> checklist. and after removal of accumulated <br /> debris or material <br /> Bioretention areas include linear treatment measures designed for water to filter through biotreatment soils. A <br /> bioretention area that is unlined and has a raised underdrain in the underlying rock layer to promote infiltration,as <br /> shown in Section 6.1,may also be called a"bioinfiltration area". <br /> 2 Attached site plan must match the site plan exhibit to Maintenance Agreement. <br /> Page 1 6214.010-C.doc <br />