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Site ID/Name: Location: Inspector: Date: BIORETENTION Applies to Bioinfiltration, Bioswales (Dry Enhanced Swales) and Rain Gardens. GENERAL INSPECTION QUESTIONS Note: ‘Yes’ indicates a maintenance need and action General: 1. Is access to the site inadequately maintained for inspection and maintenance? 2. Are grass clippings present in the drainage area or within the system [inlet structure, pretreatment (filter strip and grass channel), main treatment, or outlet/overflow structure]? (Note: grass clippings should be removed) YES / NO YES / NO Drainage Area: (pertains to the surrounding landscape that will contribute runoff to the practice) 3. Is there any exposed or unstable soil that could cause sediment accumulation within the practice? YES / NO 4. Do the drainage ways (overland flow or pipes) to the practice have trash, debris, grass clippings, large branches, etc. present? YES / NO Inlet Structure / Pretreatment: (Choose One) A. Forebay B. Weir C. Filter Strip / Grass Channels D. Rock-Lined Plunge Pools 5. Does this area have trash, debris, or sediment present? YES / NO 6. Condition of A-D listed above: A/C: Is there any undesirable vegetation or unhealthy grass (bare or dying)? YES / NO B: Is the sediment more than 25% of the total depth of the weir? YES / NO D: Is the rock thickness in the pool inadequate? YES / NO 7. Is there evidence of runoff short-circuiting (going around) the inlet structure? YES / NO 8. Is there evidence of gullies, rills, or erosion around the inlet or pre-treatment structure? YES / NO COMMENTS: GOOD EXAMPLES 9. Does the area around the inlet structure (including filter strip and grass channels) need to be mowed? YES / NO 10. If a diversion structure (high flow bypass structure or underdrain) is present, is there presence of trash, debris, on sediment? YES / NO Main Treatment: 11. Is there evidence of long-term ponding or standing water in the practice (more than 48 hours after a rain event)? stains, odors, mosquito larvae, etc.) YES / NO 12. Is there any evidence of fertilizer use on plants? fertilizer crusting on YES / NO surface of soil, tips of leaves turning brown or yellow, blackened roots, etc.) 13. For practices with internal check dams to allow for surface ponding on a slope, is there erosion present around the side of the check dams? YES / NO 14. Is the mulch depth inadequate or too deep? Note: target depth is 2 to 4 inches YES / NO Underdrain: (if installed) 15. If cleanouts are included, are caps missing? YES / NO 16. Are cleanout caps in poor condition? inadequately sealed or set below maximum YES / NO ponding depth) 17. Are there any signs of the underdrain being clogged or a blockage? YES / NO Emergency Overflow / Outlet Structure: 18. Do these structures have trash, debris, sediment or structural damage present? YES / NO 19. Is there evidence of erosion, scour, or flooding around the structure? YES / NO ---PAGE BREAK--- QUALITATIVE INSPECTION QUESTIONS (GOOD/MARGINAL/POOR) Note: ‘Poor’ indicates a maintenance need and action 20. Rate the presence of sediment accumulation in the bioretention surface area. GOOD (<25% of area) MARGINAL (25-50%) POOR 21. Rate the presence of debris leaves, trash, grass clippings) in the bioretention surface area. GOOD (<25% of area) MARGINAL (25-50%) POOR 22. Rate the presence of undesirable vegetation. GOOD (<25% of area) MARGINAL (25-50%) POOR 23. Rate the condition of plant health per landscaping plan and site objectives.* GOOD (<25% dying/stressed) MARGINAL (25%-50% dying/stressed) POOR (>50% dying/stressed) 24. Rate the condition of plant density per landscaping plan and site objectives.* GOOD (>50% vegetation coverage) MARGINAL (25%-50% vegetation) POOR (overgrown or <25% vegetation) * General percentages provided if landscaping plan and site objectives are not available EXAMPLES OF POTENTIAL ISSUES: 5 INLET SEDIMENT 5 INLET STRUCTURE DEBRIS & SEDIMENT 8 INLET EROSION (GRASS CHANNEL) 8 INLET EROSION (ROCK PLUNGE POOL) 8 PRETREATMENT EROSION (FILTER STRIPS), 14 MULCH (NONE), & 24 PLANT DENSITY (POOR) 8 PRETREATMENT EROSION (SLIDE SLOPES) & 22 UNDESIRABLE VEGETATION (POOR) 11 EXCESSIVE PONDING (CATTAILS & STAINING) 14 MULCH (NONE), 18 OUTLET DEBRIS, & 22 UNDESIRABLE VEGETATION (MARGINAL) 14 MULCH (NONE) & 22 UNDESIRABLE VEGETATION (POOR) 14 MULCH (NONE) & 24 PLANT DENSITY (POOR) 14 MULCH 22 UNDESIRABLE VEGETATION (MARGINAL) & 24 PLANT DENSITY (MARGINAL) 23 PLANT HEALTH (GOOD) & 24 PLANT DENSITY (POOR - OVERGROWN) 18 OUTLET DEBRIS 19 OUTLET STRUCTURE EROSION 23 PLANT HEALTH (POOR - EXPOSED ROOTS AND UNSTABLE)