SW3190804_Signed_Pine Forest II_Supplemental EZ forms_08.10.19_8/20/2019

SUPPLEMENT-EZ FORM COVER PAGE
Please indicate the types, quantities and locations of SCMs that will be used on this project:
Infiltration System
Bioretention Cell
Wet Pond
Stormwater Wetland
Permeable Pavement
Sand Filter
Rainwater Harvesting_
Green Roof
Level Spreader -Filter Strip
Disconnected Impervious Surface
Treatment Swale
Dry Pond
Quantity
_ _ _ Location(s)
_ _ _
__------._..---
2
BMP 100 (35.737303,-80.868514) - BMP 200 (35.736919,-80.866229)
Designer information for this project:
is and Title:
Patrick Murphy - Department Manager
anization:
R Joe Hams and Associates
et address:
127 Ben Casey Dr. Ste. 101
State, Zip:
Fort Mill, SC 29708
ne number(s):
[phone]
iil:
[e-mail]
Designer
Applicant:
Project Name:
Pine Forest II
Address
Amity Hill Road
City / Town
Statesville, INC
fm
Cnvlronmv.
aor,
Company:
JCNG II, LLC
Contact:
Michael Johnson
Mailing Address:
323 Walnut Street
City, State, Zip:
Statesville, INC 2677
Phone number(s):
[phone]
Email:
[e-mail]
Certification Statement:
I certify, under penalty of law: that this Supplement-EZ form and all supporting
information were prepared under my direction or supervision;
- that the information provided in the form is, to the best of my knowledge
and belief, true, accurate, and complete; and
that the engineering plans, specifications, operation and maintenance
agreements and other supporting information are consistent with
the information provided here.
I am aware that there are significant penalties for submitting false
information including the possibility of fines and imprisonment for knowing
violations as well as a report being made to my professional board.
Cover Page 1 1:00 PM 8/10/2019

SAND FILTER
THE DRAINAGE AREA
Drainage area number
100
Total coastal wetlands area (sq ft)
Total surface water area (sq ft)
Total drainage area (sq ft)
425191 at
BUA associated with existing development (sq ft)
Proposed new BUA (sq ft)
211134 sf
Percent BUA of drainage area
50%
COMPLIANCE WITH THE APPLICABLE STORMWATER PROGRAM
Stormwaler program(s) that apply (please specify):
Phase II MSI or UA
Is the SCM sized to treat the SW from all surfaces at build -out?
Is the SCM located on or near contaminated soils?
What are the side slopes of the SCM (H V)?
Does the SCM have retaining walls, gabion walls or other engineered side slopes?
Are the inlets, outlets and receiving stream protected from erosion (10-year storm)?
Is there a a bypass for flows in excess of the design flow?
What is the method for dewatering the SCM for maintenance?
4 SHWT elevation(frri
'1 Type of sand filter (open or closed)
1 If closed, describe if the filter will be pre -cast or pour -in -place:
#1I -
#1 f closed, lop of grate elevation (fmsl)
#2 Volume that can be retained In the sediment chamber (cubic feet)
#2 Will there be a permanent pool in the sediment chamber?
#2 Bottom of the sediment chamber (fmsl)
##22 Area of the sediment chamber (square feet)
l#2 Physical depth of the sediment chamber (inches)
#2 Ponding depth in the sediment chamber, above any permanent pool (inches
#PElevafion of top of weir between chambers (fmsh
#2 Volume that can be retained in the sand chamber (cubic feet)
Bottom of the sand chamber (fmsl)
LArea of the sand chamber (square feet)
1. #2 Physical depth of the sand chamber (inches)
#2 Pending depth in the sand chamber, above any permanent pool (inches)
ADDITIONAL INFORMATION
Break down of BUA in the drainage area (both new and existing)
- Parking / driveway (sq ft)
- Sidewalk (sq ft)
- Roof (sq ft)
- Roadway I ft)
- Other, please specify in the comment box below (sq ft)
Total BUA (sq ft)
Design rainfall depth (in)
Minimum volume required (cu ft)
Design volume of SCM (on fill
Yes #7 If applicable, with the SCM be cleaned out after construction?
Yes #8 Does the mainetenance access comply with General MDC (8)?
3:1 #9 Does the drainage easement comply with General MDC (9)9
No L
the SCM is on a singlefamily lot, does the plat comply with General MDC (10)?
Yes thereanO&M Agreement that complies with General MDC (11)?
Yes thereanO&M Plan that complies with General MDC (12)?
Drawdown Orificeas the SCM designed by an NC licensed professional?
784 ft
4704 of
No
790.0 ft
3307 sf
36 in
793 ft
2437 cf
Volume of stormwater from drainage area during design storm (cubic feet)
Total volume that can be stored above the sediment and sand chambers (cubic feet)
Is this sand filter designed to attenuate peak flows?
Elevation of the bypass device (fmsl)
Describe the bypass device:
er Structure and Weir
_Fording depth from the top of the sand to the bypass device (ft)
_Describe the mechanism for distributing flow over the sand surface:
irepay Spillway
Sand specification for sand chamber
yen Sand
Pine Forest II
1
22753 sf
11395 sf
117308 at
59678 sf
211134 sf
1.0 in
- - - 17606 of
17619 of
Yes
Yes
Yes
Yes
Yes
Yes
17619 of
96239 cf
Yes
796 ft
Eft
789 ft #7 Depth above underdrain pipe (inches) 4E Ill.in
1625 sf #8 Will the media be maintained to drain at least two inches per hour at the sand surface? Ys
18 in #9 Is at least one clean out pipe provided at the low point of each underdrain line? Yes
18 in #9 Will clean -out pipes be capped? Yes
Please use this space to provide any additional information about this sand filter that you think is relevant to the review_
Sand Filter 1 1:00 PM 8/10/2019

SAND FILTER
Sand Filter 2 1:00 PM 8/10/2019

SAND FILTER
Pine Forest II
THE DRAINAGE AREA
age area number
200
coastal wetlands area (so it)
surface water area (sq ft)
drainage area (sq ft)
360327 sf
associated with existing development (sq ft)
rsed new BUA (so ft)
136208 sf
;nt BUA of drainage area
37.8
PLIANCE WITH THE APPLICABLE STORMWATER PROGRAM
(water program(s) that apply (please specify I.
e II MSI or UA
Is the SCM sized to treat the SW from all surfaces at build -out?
Is the SCM located on or near contaminated soils?
What are the side slopes of the SCM (H:V)7
(Does the SCM have retaining walls, gabion walls or other engineered side slopes?
Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)?
Is there a a bypass for flows in excess of the design flow?
What is the method for dewalering the SCM for maintenance?
Yes
No
31
No
Yes
Yes
Drawdown Orifice
SHWT elevation (fmsl) 784 ft
Type of sand filter (open or closed) Open
If closed, describe if the filter will be pre -cast or pour -in -place:
_... _.
If closed, top of grate elevation (fmsl)
Volume that can be retained in the sediment chamber (cubic fey
Will there be a permanent pool in the sediment chamber?
Bottom of the sediment chamber (fmsl)
Area of the sediment chamber (square feel)
Physical depth of the sediment chamber (inches)
Pending depth in the sediment chamber, above any permanent
Elevation of top of weir between chambers (fir l)
Volume that can be retained in the sand chamber (cubic feet)
_.
Bottom of the sand chamber (fmsl)
4278 cf
No
788 ft
2137 at
36 in
791 ft
1575 cf
786.5 ft
Break down of BUA in the drainage area (both new and existing):
- Parking / driveway (so ft)
- Sidewalk (so ft)
13325 at
7574 at
- Roof (so ft)
67604 sf
- Roadway (so ft)
47705 at
- Other, please specify in the comment box below (so ft)
Total BUA (sq ft)
136208 s
Design rainfall depth (in)
1.0 in
Minimum volume required (cu fl)
11716 cf
Design volume of SCM (cu ft) - - - -
- 11797 cf
97 If applicable, with the SCM be cleaned out after construction?
Yes
#8 Does the mainetenance access comply with General MDC (8)?
Yes
49 Does the drainage easement comply with General MDC (9)?
Yes
#10 If the SCM is on a single family lot, does the plat comply with General MDC (10)?
# 11 Is there an O&M Agreement that complies with General MDC (11)?
Yes
912 Is there an O&M Plan that complies with General MDC (12)?
Yes
#13 Was the SCM designed by an NC licensed professionalV
Yes
#3 Volume of stormwater from drainage area during design storm (cubic feet)
11716 cf
#3 Total volume that can be stored above the sediment and sand chambers (cubic feet)
11797 of
#3 Is this sand filter designed to attenuate peak flows?
Yes
#3 Elevation of the bypass device (fmsl)
794 ft
#3 Describe the bypass device
Riser Structure and Weir
Describe the mechanism for distribut
ebay Spillway
Sand specification for sand chamber
an Sand
#7 Depth above underdrain pipe (inches)
flow over the sand surface:
Eft
#2 Area of the sand chamber (square feel) 1575 sf #8 Will the media be maintained to dram at least two inches per hour at the sand surface? Yes
-
#2 Physical depth of the sand chamber (inches) 18 in #9 Is at least one clean out pipe provided at the low point of each underdrain line? Yes
#2 Pending depth in the sand chamber, above any permanent pool (inches) - 11 in #9 Will clean -out pipes be capped? Yes
ADDITIONAL INFORMATION _
Please use this space to provide any additional information about this sand filter that you think is relevant to the review:
2
Sand Filter 3 1:00 PM 8/10/2019