V4 12 Stormwater Maintenance Manual

SWM Inspection List Name of Facility: : Table 4-5 Inspection Checklist for Stormwater Management Facilities Page { of 3 Location: Date: Facility tem 1. Embankments and Side Slopes Weather: OK" Routine? Urgent? Comments* LA. Vegetation B. Linings. C, Erosion Settlement Sioughino E, Trash ans Debris G. Seepage H. Aesthetics _ \_ Other: 2 Bottoms (Detention and Infitrationy | A. Vegetation B. Erosion _. ©. Standing Weter D. Settlement E. Trash and Debris F. Sediment G. Aesthetics H_Other: 3. Low Flow Channels (Detention) Av tion B. Linings C. Erosion D, Settlement E Standing Water F, Trash and Debris G Sediment H_Other:

‘SWM Inspection List ox! Routine? Urgent” Comments* Page2of3 8. Shoreline Erosion C. Aeration Equipment O. Trash & Debris E. Sediment F_ Waler Quality G. Other: a » Inlet Structure ‘A. Condition of Structure B. Ension : C. Trash & Debris D, Sediment E Aesthetics F, Other: 6, Oullet Structure (Detention & Retention) A. Condition of Structure B, Erosion C. Trash & Debris CD. Sediment E. Mechanical Components F. Aesthetics G. Other: é

‘SWM Inspection List Page 3 of 3 Facility tem OK" Routine Urgent? Gomments* 10. Miscellaneous A. Effectiveness of Exist. Maint. Program B, Dam Inspections _ . Potential Mosquito Habitats D. Mosquitoes E E 6. "The item checked is in good condition, and the maintenance program is adequate. 2 The tem checked requires attention, but does not present an immediate threat to the faciity function or other facility components. 5 The item checked requites immediate attention to keep the facilty operalfonal orto prevent damage to olher facdity components. “ Provide explanation atid details if columns 2 or Sare checked. semarks (Referto Item No., If Applicable}: Inspector:

SWM inspecz<a ieg Name of Facility: Table 4-6 Inspection Log for: Stormwater Management Facilities Page 1of3 Location: Fecilty em 1. Embahkmenis and Side Slopes Indicate Condition (Le. 1,201 3) A Vecesation BL Uness C. Eressn 2: Bottoms Detention and Infittration) A Necetalion 8. Ession* ing Water F. Ssciment G, Assthetics: H. Gren: 3, Low Fiow Channels (Detention) A vaselatien rosion Sending Water F. “esh ase Debris | &. C. Es D. Sedlernent —E F. G. fi

‘SWM Inspection Log Facity fem 4, Ponds (Retention) Page 2 of 3 A_ Vegetation B. Shoreline Erosion . Aeration Equipment D. Trash & Debris E. Sediment F. Water Quality Other: 5. Inlet Structure A. Condition of Stucture 8. Exosion C. Trash & Debis D. Sediment E Aesthetics F. Other: 6, Outlet Structure (Detention & Retention) “A. Condition of Stucture B, Erosion C. Trash & Debris D. Sediment E Mechanical Components F. Aesthetics &. Other: 7. Emergency Spitiway _ A_Vegetation B. Lining - C. Erosion D. Trash & Debris E Other: 8. Perimeter A. Vegetation B. Erosion C. Trash & Debris D. Fences & Gales E Aesthetics F. Other: 9. Access Roads A_Vegetation B. Road Surface

SWM Inspection Log . Page 30f3 Facity tem 10. Miscellaneous A. Effectiveness of Exist. Maint. Program 8. Dam Inspections G. Potential Mosquito Habitats D. Mosquitoes E FE G. 1 The item checked is in good condition, cind the maintenance program is adequate. 2 ‘Thetem checked requires attention, but does not present an immediate threat to the faciity function or other facility components. 3 The tem checked requires immediate attention to keep the facility operational orto prevent damage to other facility components. ‘Remarks (Relerto ttem No., If Applicable):

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GREEN ROOF MAINTENANCE GUIDE Performing routine, preventative maintenance is essential to keeping your green roof healthy. All maintenance should be performed by trained and qualified personnel and using horticultural and safety best practices. Working on elevated structures may require safety training and specialized, protective equipment. Please consult applicable safety regulations and building codes. This installation guide outlines the basic tasks associated with ongoing green roof plant care and maintenance. Seasonal plant care and green roof maintenance is outlined below for traditional ‘extensive’ (nominal 4” depth) green roofs. Green roofs involving ‘semi-intensive’ (6”) and ‘intensive’ (8”) modules (aka “roof gardens”), typically incorporate larger and more diverse plantings like ornamental grasses and herbaceous perennials. The associated care and maintenance for these applications is generally more frequent and similar to ground-level landscaping. MAINTENANCE ACTIVITIES AND SCHEDULE The type of maintenance activities required for a green roof will depend on the plantings and regional climate. The seasonal guidelines noted below are typical for ‘extensive’ green roofs planted with low-growing, drought-tolerant sedum and succulents in most moderate climates (Zones 3-7) with 30-50 inches per year of precipitation. Basic green roof maintenance involves watering, weeding, and plant care. Proactive maintenance will always be best. Watering Green roof systems are typically designed using hardy, drought-resistant varieties that can thrive in a harsh roof top environment. Extensive green roofs typically don’t require built-in irrigation systems in most regions. However, during periods of prolonged drought, the extensive green roof should be watered to sustain plant health. As a general rule, if natural precipitation is < 0.5-inch in a 10-15 day period during the growing season, watering may be needed or plants may become dormant or fail. Prolonged temperatures above 85 degrees F and/or very windy locations may need to be watered sooner. Supplemental irrigation should include the application of approximately 1 inch of water once per week until more moderate precipitation patterns resume. In

ooner. Supplemental irrigation should include the application of approximately 1 inch of water once per week until more moderate precipitation patterns resume. In arid climates (including Southern CA, Southwest U.S., High Plains and Mountain states and central TX) as well as the Southeast U.S. and Gulf Coast regions, permanent irrigation systems are recommended for all green roof systems. Weeding The green roof should be visually inspected and spot-weeded every 2-4 weeks during the growing season. It is important to remove weeds before they flower and set seed to minimize future efforts. Like any garden, preventative, regular weeding has the best results with the least total effort. In most climates, for green roofs < 5,000 sf, weeding will require about 10 to 20 man-hours per year. While weeding, it is a good idea to inspect the roof drains and insure that water not utilized by the green roof can drain freely off the roof. Plant Care Green roof plant care has two primary components – fertilizing and trimming. Fertilizing should be conducted at least annually in spring for the first 3-5 years after installation, and then on a reduced schedule if soil testing and plant performance suggest it is advisable. Late summer or early fall fertilizing may also be suggested depending on the plant mix and region, but is (888) 404-4743

generally not necessary. Avoid feeding during the hottest/driest parts of the year or late in the season when plants should be entering a dormant or less active phase. Nutrients should be added with granular, slow-release fertilizer (minimum 3 months) with a target N-P-K ratio of 18-6-12. Alternatively, a generic 10-10-10 slow-release general landscaping fertilizer can be used and is often available at garden and home centers. We recommend Harrells, Osmocote®, and Nutricote® products. Where an organic fertilizer is preferred, Plant Tone (Espoma), or Earthworks Replenish are also effective. Apply fertilizers in accordance with the manufacturer’s recommendations and instructions on the container. Soil tests are recommended every year or every other year, with target values the same as for general landscaping. Every two to three years, trim the green roof to encourage additional leaf development at the plant crown and to spread regenerative cuttings across the system during the spring season. A string trimmer or even a lawn mower set at the maximum height with a mulching blade can be used. Everybody likes a haircut, and so do your plants! During each green roof maintenance event (or monthly) it is advisable to monitor plant health. These observations may adjust the timing or needs for other maintenance tasks. An overview about green roof maintenance in each season and general sequencing about plant care seasonal is illustrated below. SEASONAL GREEN ROOF MAINTENANCE – MOST U.S. REGIONS Plant Type Spring Summer Fall Sedums Fertilize (April) Weed (every 2-4 weeks) Weed (October) Weed (May) Watering (during Trim* (optional – May) droughts) Perennials Trim* (March-Apr) Weed (every 2 weeks) Weed (October) Fertilizer (April) Activate irrigation system Replant* (if necessary) Replant* (if necessary)