13 2026 02 12 Crestmont CC Stormwater O and M Manual

OVAL RD EAGLE ROCK AVE VE ELA UR LA 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 NJ Certificate of Authorization No. 24GA27996400 © 2024 Langan Date: 3/4/2026 Time: 18:13 User: tgreen Style Table: Langan.stb Layout: CG103 Document Code: 101049802-0102-CG101-0104

OVAL RD EAGLE ROCK AVE E AV EL UR LA 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 NJ Certificate of Authorization No. 24GA27996400 © 2024 Langan Date: 3/4/2026 Time: 18:14 User: tgreen Style Table: Langan.stb Layout: CG104 Document Code: 101049802-0102-CG101-0105

A B B A SECTION A-A SECTION B-B B DOWNSPOUT A A WYE FITTING 6" SCHEDULE 40 PVC WITH PVC BOOT ADAPTER DOWNSPOUT COVER PAINTED TO MATCH B 2" MAXIMUM SEE NOTE #1

#1 1% MINIMUM SLOPE SEE NOTE #2 45° BEND STORM SEWER PIPE (SIZE (SCH 40 PVC) VARIES) SEE GRADING PLAN FOR LOCATION INSTALL FLEXIBLE CONNECTION AFTER BEND

AFTER BEND NOTES: 1. FOR ALL DEPTHS OF COVER LESS THAN TWO (2) FEET, PIPE MUST BE SCHEDULE 40 PVC. FOR DEPTHS OF COVER GREATER THAN TWO (2) FEET, FLEXIBLE PIPE MAY BE USED. REFER TO SPECIFICATIONS FOR ALLOWABLE PIPE TYPES. 2. A WATERTIGHT CONNECTION SHALL BE MAINTAINED WITH ANY TRANSITION FROM SCHEDULE 40 PVC PIPE TO ANY OTHER PIPE TYPE. 3. THE DOWNSPOUT COLLECTOR DRAIN SHALL BE INSTALLED BEFORE THE

DOWNSPOUTS ARE INSTALLED ON THE BUILDING. SITEWORK CONTRACTOR SHALL BE RESPONSIBLE FOR ALL WORK INCLUDING THE RODENT SCREEN. BUILDING CONTRACTOR SHALL BE RESPONSIBLE FOR THE CONNECTION AT THE POINT OF THE RODENT SCREEN. 4. IF NECESSARY, ADJUST FOOTING TO ALLOW DOWNSPOUT TO BE INSTALLED TIGHT AGAINST BUILDING 12"(30cm) 4"(10cm) 1. Prepare soil before installing rolled erosion control 2/12/2026

2/12/2026 products (RECPs), including any necessary application 6" of lime, fertilizer, and seed. 6" (15cm) 4"(10cm) 2. Begin at the top of the channel by anchoring the (15cm) RECPs in a 6"(15cm) deep X 6"(15cm) wide trench with approximately 12"(30cm) of RECPs extended beyond 5 the up-slope portion of the trench. Use ShoreMax mat 2 7 at the channel/culvert outlet as supplemental scour 6" protection as

6" protection as needed. Anchor the RECPs with a row of (15cm) staples/stakes approximately 12"(30cm) apart in the 2"-5" bottom of the trench. Backfill and compact the trench (5-12.5cm) after stapling. Apply seed to the compacted soil and fold the remaining 12"(30cm) portion of RECPs back over the seed and compacted soil. Secure RECPs over compacted soil with a row of staples/stakes spaced 4"-6" (10-15cm) 3 approximately 12" apart across the width of the RECPs.

Langan Engineering and 3. Roll center RECPs in direction of water flow in bottom of channel. RECPs will unroll with appropriate side Environmental Services, LLC 6 against the soil surface. All RECPs must be securely fastened to soil surface by placing staples/stakes in appropriate locations as shown in the staple pattern 300 Kimball Drive 4

300 Kimball Drive 4 guide. 4. Place consecutive RECPs end-over-end (Shingle style) Parsippany, NJ 07054 with a 4"-6" overlap. Use a double row of staples staggered 4" apart and 4" on center to secure RECPs. 1 5. Full length edge of RECPs at top of side slopes must be anchored with a row of staples/stakes approximately T: 973.560.4900 F: 973.560.4901 www.langan.com 2"-5" 2"-5" (5-12.5cm) E (5-12.5cm) 12"(30cm) apart in a 6"(15cm) deep X 6"(15cm) wide