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Exhibit C-2 <br />Flow -Through Planter Maintenance Plan for <br />1180 Main Street <br />02/11/2020 <br />Flow-through planters are designed to treat and <br />temporarily detain runoff without allowing <br />seepage into the underlying soil. They typically <br />receive runoff via downspouts leading from the <br />roofs of adjacent buildings. <br />Project Address and Cross Streets <br />1180 Main Street Redwood City, CA 94063 <br />NE of intersection of Main S[rr.et and Elm Street <br />Assessors Parcel No.: 053-147-060, 053-147-070 <br />Property Owner: <br />Premia 1180 Main Owner, LLC <br />Phone No.: (650) 600-7430 <br />Designated Contact: Gloria Arteaga <br />Phone No.: (650) 600-7432 <br />Mailing Address: 801 Hamilton Street <br />Redwood City, CA 94063 <br />The property contains 4 flow-through planter(s), located as described below <br />and as shown in the attached site plan: <br />- Treatment Area #1A is located adjacent to the Caltrain Tracks, at the North end <br />- Treatment Area #1 B is located adjacent to the Caltrain Tracks, at the South end <br />- Treatment Area #2 is located at the South corner of the building, closest to Elm and Lathrop <br />- Treatment Area #3 is located between the creek and the building, close to Maple Street <br />I. Routine Maintenance Activities <br />The principal maintenance objectives are to ensure that water flows unimpeded into the <br />flow-through planter and landscaping remains attractive in appearance. Table 1 shows the <br />routine maintenance activities, and the frequency at which they will be conducted. <br />Table 1 <br />Routine Maintenance Activities for Flow -Through Planters <br />No. <br />Maintenance Task <br />Frequency of Task <br />1 <br />Evaluate health of trees and groundcover. Remove and replace all dead <br />Twice a year <br />and diseased vegetation. <br />2 <br />Maintain vegetation and the irrigation system. Prune and weed to keep flow- <br />As needed <br />through planter neat and orderly in appearance. <br />3 <br />Check that mulch is 3" deep and replenish as necessary. It is recommended <br />As needed <br />that composted arbor mulch be applied once per year to maintain the 3" <br />depth in all bare soil areas except within six inches of tree trunks. <br />4 <br />Check that soil is at appropriate depth. Till or replace soil with the approved <br />Before wet season and as <br />biotreatment soil mix as necessary to maintain a minimum of 6 inches <br />necessary <br />between top of mulch and overflow weir. <br />5 <br />Remove accumulated sediment, litter and debris from flow-through planter <br />Before wet season and as <br />and dispose of properly. Confirm that no clogging will occur and that the box <br />necessary <br />will drain within three to four hours. <br />6 <br />Inspect flow-through planter to ensure that there are no clogs. Test with <br />Monthly during the wet season, <br />garden hose to confirm that the planter will drain within three to four hours, <br />and as needed after storm <br />events <br />Page 1 <br />ATTY/AGR.2020.035/Premia 1180 Main Owner, LLC (Page 16 of 18) <br />Updated 02/11/2020 <br />