630 Begonia St FDEP stormwater permit as-built inspection (4) THE TOURING COMPANY, INC.
ENGINEERING / C O N S T R U C T I O N
November 26, 2019
Steve Starke
Begonia Street HOA, Inc.
732 Pine Street
Neptune Beach, FL 32266
Re: FDEP Stormwater Permit As-Built Inspection
Permit File No. 0377021001 EG
Begonia Street Residential
Atlantic Beach, FL
Dear Steve:
As part of the design and permitting service for the above referenced project, I recently
performed an as-built inspection regarding the construction of the stormwater management
system. The system was designed and permitted in accordance with the requirements of the
FDEP and the St John River Water Management District.
The system is as depicted in the Grading and Drainage plan prepared by The Touring
Company, and attached to the permit.
Based on the inspection, the system has been built according to the stormwater management
design and permit. There are no substantial deviations and the system will function as required.
Please note that as each dwelling is constructed, associated drainage for the lot shall be
installed as indicated in the individual lot drainage plan, which have been coordinated with the
permit plan.
I have attached the permit to this correspondence for convenience.
Thank you for the opportunity to provide our services to you. Please feel free to contact me at
(904) 614-3302 or at Dtouring@thetouringco.com if you have any questions or comments.
Sincerely,
THE TOURING COMPANY, INC.
David E. Touring, PE
President
cc: File
14286-19 BEACH BLVD • UNIT 355 • JACKSONVILLE • FLORIDA • 32250 • (904) 614-3302
DeSantis
oeaART'ye+ FLORIDA DEPARTMENT OF Ron Governor
o Environmental Protection
Jeanette Nunez
oBob Martinez Center Lt.Governor
2600 Blair Stone Road
4' Tallahassee, Florida 32399-2400 Noah Valenstein
FNrAt. Pa
Secretary
SELF-CERTIFICATION FOR
A STORMWATER MANAGEMENT SYSTEM IN UPLANDS SERVING
LESS THAN 10 ACRES OF TOTAL PROJECT AREA AND
LESS THAN 2 ACRES OF IMPERVIOUS SURFACES
Owner(s)/Permittee(s): Begonia Street HOA, Inc
File No: 037702100 l EG
File Name: BEGONIA STREET RESIDENTIAL
Site Address: Begonia Street and W 6th Street
Atlantic Beach FL- 32233
County: Duval
Latitude: 30° 19'46.5958"
Longitude: -81° 25'27.3213"
Total Project Area: 0.749
Total Impervious Surface Area: 0.328
Approximate Date of Commencement
07/01/2019
of Construction:
Registered Florida Professional: David Touring
License No.: 53503
Company: The Touring Company, Inc.
Date:June 08, 2019
David Touring certified through the Department's Enterprise Self-Service Application portal that the
project described above was designed by the above-named Florida registered professional to meet the
following requirements:
(a)The total project area involves less than 10 acres and less than 2 acres of impervious surface;
(b)Activities will not impact wetlands or other surface waters;
(c)Activities are not conducted in, on, or over wetlands or other surface waters;
(d)Drainage facilities will not include pipes having diameters greater than 24 inches,or the hydraulic
equivalent,and will not use pumps in any manner;
(e)The project is not part of a larger common plan,development, or sale; and
(f)The project does not:
1.Cause adverse water quantity or flooding impacts to receiving water and adjacent lands;
2.Cause adverse impacts to existing surface water storage and conveyance capabilities;
3.Cause a violation of state water quality standards;or
4.Cause an adverse impact to the maintenance of surface or ground water levels or surface water flows
established pursuant to s. 373.042 or a work of the district established pursuant to s. 373.086, F.S.
This certification was submitted before initiation of construction of the above project.The system is
designed,and will be operated and maintained in accordance with applicable rules adopted pursuant to part
IV of chapter 373,F.S.There is a rebuttable presumption that the discharge from such system will comply
with state water quality standards.Therefore,construction, alteration, and maintenance of the stormwater
management system serving this project is authorized in accordance with s.403.814(12), F.S.
In accordance with s. 373.416(2), F.S., if ownership of the property or the stormwater management system
is sold or transferred to another party,continued operation of the system is authorized only if notice is
provided to the Department within 30 days of the sale or transfer.This notice can be submitted to:
FDEP Northeast District
8800 Baymeadows Way West
Jacksonville, FL 32256
This certification was submitted along with the following electronic documents:
File Description
Existing Site
riroposed Site
—^
Drainage Report
If you have submitted this certification as a Florida Registered Professional,you may wish to sign and seal
this certification,and return a copy to the Department,in accordance with your professional practice act
requirements under Florida Statutes.
I,David Touring,License No.53503,do hereby certify that the above information is true and accurate,
based upon my knowledge,information and belief. In the space below, affix signature,date, seal,company
name,address and certificate of authorization(if applicable).
This sealed certification may be submitted to the Department,either electronically (as an attachment in
Adobe PDF or other secure,digital format) at Erp.selfcerts@dep.state.fl.us,or as a hardcopy, at the postal
address below:
FDEP Northeast District
8800 Baymeadows Way West
Jacksonville, FL 32256
STORMWATER MANAGEMENT REPORT
PREPARED FOR
BEGONIA STREET HOA, INC.
RESIDENTIAL LOTS
BEGONIA STREET, ATLANTIC BEACH, FLORIDA
JUNE 3, 2019
PREPARED BY
THE TOURING COMPANY, INC.
CIVIL AND MARINE CONSULTING
14286-19 BEACH BLVD.,UNIT 355
JACKSONVILLE,FLORIDA 32250
PHONE: (904)614-3302
FAX: (904)223-6045
INTRODUCTION
Begonia Street HOA, Inc.owns existing platted residential lots in Atlantic Beach, Florida.The site
currently contains 6 residential building lots. The proposed development includes constructing 6
houses on the properties, adhering to the design and construction standards for Atlantic Beach,
Florida. The existing storm water runs into a tidally influence drainage ditch which discharges to
the Intracoastal Waterway(ICW)to the west. The drainage design was developed to convey the
additional runoff from the proposed impervious surfaces.
PRE-DEVELOPED DRAINAGE PATTERNS
The existing site currently is bounded on three sides by drainage swales which discharge to the
ICW to the west. Runoff from the site is conveyed over ground to these existing swales.
POST DEVELOPED DRAINAGE PATTERNS
The site will continue to drain to the perimeter swales adjacent to the properties. However, runoff
from the new impervious dwellings will be directed to a water quality retention ditch in the rear of
each building. The retention swale is sized in accordance with the requirements of the St Johns
River Water Management District (SJRWMD). The retention swale will discharge to the existing
tidally influenced drainage ditches during rainfall events that exceed to required treatment
volume. The retention swale is required to accommodate the increased runoff and water quality
requirements.
STORMWATER CALCULATIONS
The development of the project will increase the impervious area, although discharge is to a
tidally influence receiving body. For this reason, attenuation management is not required.
Attached are calculations to demonstrate the required and provided treatment volumes in the
proposed dry retention basin and a calculation to demonstrate that the basin will dewater in less
than 72 hours.
2
Begonia Street Residential
Water Qualtiy Calculations
June 3,2019
The calculations below follow the criteria and methodology set forth in the St.John's River Water
Management District's Applicant's Handbook:Regulation of Stormwater Management Systems,Chapter
40C-42,F.A.C.,for retention systems.
Drainage area= 32,640 sf
Percent impervious= 44%
f= 0.30
= 1.0 in/hr = 2.0 ft/day Assumed values
KH= 2.0 ft/day
FS= 2.0
Basin bottom elevation= 4.50 ft
The seasonal high groundwater elevation is determined from the City evaluation. The SHGW Table
is set at 1.0 feet below existing grade indicating groundwater high GW at:
Seasonal high ground water table elevation= 3.50 ft
Based on the above and assuming as before,the impervious layer is estimated as:
Impervious layer elevation= 0.00 ft
The proposed detention basin has the following stage-storage relationship:
Stage(ft) Storage(cf)
4.50 0
5.00 1,050
6.00 3,150
Calculate the required treatment volume. For on-line retention,the rule requires retention of 0.5 inches of
runoff or 1.25 inches times the impervious area,whichever is greater,plus an additional 0.5 inch.
0.5"volume= 1,360 cf
1.25"x imp.area= 1,488 cf
Total treatment volume= 2,848 cf
Calculate the height of the treatment volume in the basin. Using the stage/storage data,we see that 7,269
cf is between elevation 37.00 and 38.00 ft. Interpolating:
Treatment vol.elev.= 5.42 ft
Determine if saturated lateral(Stage Two)flow will occur:
The area of the basin bottom(Ab)is:
Ab= 2,100 sf
Utilizing Equation 26-3,the volume infiltrated during Stage One(V„)is:
V„=Abhbf= 630 cf
Saturated lateral flow will occur since V„<treatment volume
Calculate the time to infiltrate the treatment volume during unsaturated vertical(Stage One)flow.
The unsaturated vertical conductivity(K,,,,)is determined from the attached geotechnical report:
K„,= 1.0 in/hr = 2.0 ft/day
The design infiltration rate(Id)is found from Equation 26-1:
Id=KV,,/FS= 1.0 ft/day
From Equation 26-2,the time to saturate the soil beneath the basin(t,„„)is:
feet=fhb/Id= 0.30 days = 7.20 hrs
Calculate the remaining treatment volume to he recovered under saturated lateral(Stage Two)flow
conditions.
Remaining volume to be infiltrated under saturated lateral flow= 2,218 cf
Calculate the elevation of treatment volume at the start of saturated lateral flow by interpolating:
Treatment volume elev.at start of saturated lateral flow= 5.56
Calculate F)and Fx
When the treatment volume is recovered(time t=trove)the water level is at the basin bottom.
Hence,the height of the water level above the initial groundwater table(he)will be equal to hb.
he=hb= 1.00 ft(at t=tTa,>)
The height of water in the basin at the start of saturated lateral flow(h2)is:
h2= 1.06 ft
From Equation 26-8:
HT=hb+h2= 2.06 ft
Fy is determined from Equation 26-6:
Fy=he/HT= 0.49
When the water level is at the basin bottom(time t=trove)the basin length
(L)= 300 ft and the basin width(W)= 7 ft.
Basin length to width ratio(IJW)= 42.86
Determine Fx
From Figure 26-7;Fx= 1.5
Calculate the time to recover the remaining treatment volume under saturated lateral flow.
H= 3.5 ft
The average saturated thickness(D)can be found from Equation 26-7:
D=H+h,./2= 4 ft
The time(t)to recover the remaining treatment volume under lateral saturated flow conditions is
determined from Equation 26-9:
t=W2/(4 KH D Fx2)= 0.65 days = 15.50 hrs
Total time to recover the treatment volume(t o i)equals the time to recover during unsaturated vertical
flow plus the time to recover under lateral saturated conditions.
Total recovery time(tTo,&)= 22.70 hrs
Therefore,the design meets the 72 hour recovery time criteria.
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Electronic Articles of Incorporation N19000005152
FILED
For May 08 2019
Sec. Of State
dlokeefe
BEGONIA STREET HOA, INC
The undersigned incorporator, for the purpose of forming a Florida not-for-
profit corporation, hereby adopts the following Articles of Incorporation:
Article I
The name of the corporation is:
BEGONIA STREET HOA, INC
Article II
The principal place of business address:
632 PINE STREET
NEPTUNE BEACH, FL. 32266
The mailing address of the corporation is:
632 PINE STREET
NEPTUNE BEACH, FL. 32266
Article III
The specific purpose for which this corporation is organized is:
STORM-WATER RETENTION CANAL MAINTENANCE FOR 6 INDIVIDUAL
LOTS
Article IV
The manner in which directors are elected or appointed is:
AS PROVIDED FOR IN THE BYLAWS.
Article V
The name and Florida street address of the registered agent is:
STEPHEN M STARKE
632 PINE STREET
NEPTUNE BEACH, FL. 32266
I certify that I am familiar with and accept the responsibilities of
registered agent.
Registered Agent Signature: STEPHEN M. STARKE
N19000005152
FILED
Article VI May 08 2019
Sec Of State
The name and address of the incorporator is: dlokeefe
STEPHEN M STARKE
632 PINE STREET
NEPTUNE BEACH, FL 32266
Electronic Signature of Incorporator: STEPHEN M. STARKE
I am the incorporator submitting these Articles of Incorporation and affirm that the facts stated herein are
true. I am aware that false information submitted in a document to the Department of State constitutes a
third degree felony as provided for in s.817.155, F.S. I understand the requirement to file an annual report
between January 1st and May 1st in the calendar year following formation of this corporation and every
year thereafter to maintain "active" status.
Article VII
The initial officer(s) and/or director(s) of the corporation is/are:
Title: P
STEPHEN M STARKE
632 PINE STREET
NEPTUNE BEACH, FL. 32266
Title: VP
JOSEPH HOLTON
6685 BOWIE ROAD
JACKSONVILLE, FL. 32219
Article VIII
The effective date for this corporation shall be:
05/07/2019