13 2026 02 12 Crestmont CC Stormwater O and M Manual

12"(30cm) apart in a 6"(15cm) deep X 6"(15cm) wide NJ Certificate of Authorization No. 24GA27996400 trench. Backfill and compact the trench after stapling. 6" 6. Adjacent RECPs must be overlapped approximately 2' 10" (15cm) 2"-5" (5-12.5cm) (Depending on RECPs type) and (0.6m) (25cm) stapled. 4' 7. In high flow channel applications a staple check slot is (1.2m) 8 recommended at 30 to 40 foot (9 -12m) intervals. Use a 20"(0.5m) double row of staples staggered 4"(10cm) apart and NOTES: 4"(10cm) on center over entire width of the channel. CRITICAL POINTS 10"(25cm)

4"(10cm) on center over entire width of the channel. CRITICAL POINTS 10"(25cm) *Horizontal staple spacing should be 8. The terminal end of the RECPs must be anchored with A. Overlaps and Seams B. Projected Water Line altered if necessary to allow staples to a row of staples/stakes approximately 12" (30cm) apart C. Channel Bottom/Side Slope Vertices secure the critical points along the in a 6"(15cm) deep X 6"(15cm) wide trench. Backfill 3.3' channel surface. and compact the trench after stapling. A A (1m) B B C C **In loose soil conditions, the use of staple or stake lengths greater than 6"(15cm) may be necessary to properly secure the RECP's. 3.75 Staples per SQ.YD.

properly secure the RECP's. 3.75 Staples per SQ.YD. © 2024 Langan Date: 3/4/2026 Time: 18:16 User: tgreen Style Table: Langan.stb Layout: CG501 Document Code: 101049802-0102-CG501-0101

EXISTING GRADE TYPE B INLET TYPE E INLET BOTTOM OF RAIN GARDEN SHALL BE A MINIMUM 12" ABOVE THE SEASONAL HIGH GROUNDWATER TABLE SHWT EL. N.T.S. 2/12/2026 Langan Engineering and Environmental Services, LLC 300 Kimball Drive Parsippany, NJ 07054 T: 973.560.4900 F: 973.560.4901 www.langan.com VARIES NJ Certificate of Authorization No. 24GA27996400 CLASS "A" CONCRETE DUMP NO WASTE DRAINS TO RIVER © 2024 Langan Date: 3/4/2026 Time: 18:16 User: tgreen

© 2024 Langan Date: 3/4/2026 Time: 18:16 User: tgreen Style Table: Langan.stb Layout: CG502 Document Code: 101049802-0102-CG501-0102

= APPENDIX A Stormwater Management Facilities – Inspection Checklist

Inspection Checklist for Stormwater Management Facilities Name of Facility: Location: O.K Routine Urgent Comments 1. Small-Scale Bioretenion Basins A. Standing Water B. Trash & Debris C. Sediment D. Other O.K Routine Urgent Comments 2. Outlet Control Structures A. Condition of Structure B. Trash & Debris C. Sediment D. Condition of Trash Racks E. Other O.K Routine Urgent Comments 3. Inlet Structures A. Condition of Structure B. Trash & Debris C. Sediment D. Other O.K Routine Urgent Comments 4. Manhole Structures A. Condition of Structure B. Trash & Debris C. Sediment D. Other 5. Porous Pavement A. Condition of Outlet Structures B. Trash & Debris C. Sediment within Porous Asphalt D. Condition of Trash Racks on Outlets E. Condition of Underdrain Piping O.K Routine Urgent Comments 6. Miscellaneous A. Effectiveness of Exist. Maint. Program B. Potential Mosquito Habitats C. Potential Rodent Habitats

= = = = = = APPENDIX B Stormwater Management Facilities – Maintenance Log

Maintenance Log for Stormwater Facilities Name of Facility: Location: Preventative Maintenance: Date: Work Item: (X) - Completed 1 Trash and Debris Removal A. Small-Scale Bioretention Basins B. Outlet Control Structures C. Inlets/Manholes D. Conveyance Pipes E. Riprap Aprons F. Porous Pavement 2 Sediment A. Small-Scale Bioretention Basins B. Outlet Control Structures C. Inlets/Manholes D. Conveyance Pipes E. Riprap Aprons and Scour Hole F. Porous Pavement 3 Elimination of Potential Insect and Rodent Habitats A. Potential Mosquito Habitats - Eliminate Standing Water B. Potential Rodent Habitats - Fill Burrows and Remove Debris 4 Other Preventative Maintenance A. Corrective Maintenance: Date: Work Item: (X) - Completed 1 Removal of Debris and Sediment 2 Structural Repairs 3 Dewatering 4 Erosion Repair 5 Elimination of Trees, Brush, Roots & Animal Burrows 6 Snow & Ice Removal 7 Other