NCG520104_Regional Office Historical File Pre 2018 (2)

V FILE
SOC PRIORITY PROJEECT: esZitX-
T �
Yes, SOC No.
To: Permits and Eng"ineering Unit
Water Quality Section
Attention: Joe Corporon
Date: February 21, 2011
NPDES STAFF REPORT AND RECOMMENDATION
County: Gaston
Permit No. NCG520104
PART I - GENERAL INFORMATION -
i. Facility and Address: Rea Contracting
8205 Wilkinson Blvd.
Charlotte, N.C. 28214
2. Date of Investigation: February 16, 2011
3. Report Prepared By: Samar Bou-Ghazale, Env. Engineer !I
4. Persons Contacted and Telephone Number: Mr. Dallas McRolrie,
General Manage.-; Tel # [phone].
S. Directions to Site: From the Intersection of Colt Thornbiirg
SR 1802 and Bob Friday Road SR 1.807 in Dallas, drive on SR 1807
approximately 1 mile to gate and site entrance.
6. Discharge Point- (s) : List for all discharge points:
Latitude: 35022'03" Longitude: 81010'06"
Attach a U.S.G.S. map extract and indicate treatment facility
site and discharge poinL on map.
U.S.G.S. Quad No.: F 14 SW U.S.G.S. Name: Gastonia North
7. Site size and expansion are consistent with application?
Yes x No If No, explain:
8Topography (relationship to flood plain included): Facility
may be located in the 100 year flood plain. Flat slopes range

q
from 0 to 1%.
9. Location of nearest dwelling: Nione W 4
,.-,!-4
Ln SOO fee- o-T
discharge poinz.
iO. Receiving st-ream or a-`� ,Lfected sarface waters: South -ork Ca+, -,a
River.
a. Classification: WS IV
b. River Basin and Subbasin No.: 'Catawba; 030836
C. Describe receiving stream features and pertin
downstream uses: The receiving stream was approximat
11 00 f eet wide and ranges from l feet to 5 f set deep at
time of investigation.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted: Unknown
b. What is the current permitted capacity of the wastewa
treatment facility? N/A
C. Actual treatment capacity of the current facility (curr
design capacity)? N/A
d. Date(s) and construction activities all
Authorizations to Construct issued in
years: N/A
e. Please provide a description of existing
constructed wastewater treatment facili
treatment consists of two settling basin.c
generated from sand dipping operation.
f. Please provide a description of prof
treatment facilities: N/A
9- Possible toxic impacts to surface water
h. Pretreatment Program (POTWs only): N/A
2. Resid
T-,- g"-4 i-
sheet) : N/A
4. SIC Code(s): 1442
Wastewater Code: 43
ubstantially
: Wastewater
lastewater is
i wastewater

M
AA
PART III - OTHER PERTINENT INFORNANON
1 is "his facility being constructed with Construction Grant
Fu.ndis or ere any public monies involved (municipals
2. Special monitoring or limitations (including toxicity)
requests: N/A
3. Important SCC, JOC or Compliance Schedule dates: (please
indicate) N/A
4. Alternative Analysis Evaluation: Has the facility evaluated
all of the non -discharge options available? Please provide
regional perspective for each option evaluated. N/A
5. Air Quality and/or Groundwater concerns or hazardous materials
utilized at this facility that may impact water quality, air
quality, or. groundwater: No GW or Air Quality concern No
hazardous materials utilized at this facility.
PART IV - EVALUATION AND RECOMMENDATIONS
Rea Contracting is applying for a general permit for the
discharge of wastewater generated from the sand dipping operation
at: the South Fork Catawba Mine site. Sand Dipping will occur
approximately twice per year according to applicant with about 8000
tons of sand excavated and stockpiled for removal. There are two
settling basins on site.
It is recoi-runended the subject permit be issued as requested.
too,
Signature of Report—frr—eparer
hater Quality Regional Supervisor
Date

NCDENR
C", North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H, Su lies Dee Freeman
Governor Director Secretary
January 18, 2011 RECEIVED
NVISION OF WATER QUALITY
DAVID J RANKIN JAN 2 0 2011
REGIONAL VP
REA CONTRACTING, A DIV OF THE LANE CONST CORP K31A
8205 WILKINSON BLVD MQ0RESVd,L.E REGIONAL OFFICE
CHARLOTTE NC 28214
Subject: Acknowledgement of New Permit Application
Permit #: NCG520104
Facility: Sand Pit #104
Gaston County
Dear Mr. Rankin:
The Division of Water Quality NPDES acknowledges receipt of your permit application, with payment and supporting
materials on January 12, 2011. This application package has been assigned the number listed above and will be reviewed by
Joe Corporon. By copy of this letter, we are also requesting a Staff Report from the Mooresville Regional Office.
The reviewer will perform a detailed review and contact you with a request for additional information if necessary. To ensure
the maximum efficiency in processing permit applications, the Division requests your assistance in providing a timely and
complete response to any additional information requests.
Please note at this time, processing permit applications can take as long as 60 - 90 days after receipt of a complete application.
To check on the status of an application, please visit litt �Ih2o.ennstatejic.us" /Re
Rt iijslli�r iits.html.
If you have any questions, please contact Joe Corporon at 919-807-6394, or via e-mail atjoe,corporon co)ncdenr.gov. If the
reviewer is unavailable, you may leave a message, and they will respond promptly.
PLEASE REFER TO THE ABOVE APPLICATION NUMBER WHEN MAKING INQUIRIES ON THIS PROJECT.
Sincerely,
Dina Sprinkle
Point Source Branch
cc: *WWWWWROUNK"be, Surface Water Protection Section
Central Files
Permit Application File NCG520104
T. Patrick Shillington, P.E., President, E2S Engineering & Environmental Science Co
1617 Mail Service Center, Raleigh, North Carolina 276,39-1617 One
Location: 512 N. Salisbury St, Raleiqh, North Carolina 27604 NorthCarofina
Phor 919-807-6300, FAX: [phone] \ Customer Service: 1-877-623-6748
intemet, wvw,,_ncwaterquafty,or9 VIVahl-rally
An, Equal 0.ppod'Wnity'Affirmative Action E"'mployer

�* �^ Division of Water Quality iWater Quality Section
�
WDENNational 1a011t<ttat2t Discharge Elimination So`4Ct'1"tl
e a.n.ri�r ce,rtn^+as^;-ro.n ��,.rao-7 yy"�;� pp y £ z st in �yaav, E s
00
NOTICE OF INTENT
National Pollutant Discharge Elimination System application for coverage under General Permit
NCG520 00: Sand Dredging operations and similar point source discharges
(Please print or type)
1) bailing address} of owner/operator:
Company name Rea Contractin A pivision of The Lane Construction Ct�rati�an
Owner Mama Cla i Tl. R nitin
Street Address 2 0 5 V Dins n U
City t h {1Cil1e State !' c ZIP d `
0 9 - 1
Telephone No.>
* Address to %41icrt all pertilat ctarrtt prsrtata rwe wit) be matted
Location of facility producing discharger
Facility Name Sand Pit ##19
Facility Contact a ct l alias 1t cRori
Street onta Bob hide t w ,
City m is m State 1P tcae C1
County a ctn
Telephone No, Fax:
Physical location n information:
Please provide a narrative description of how to get to the facility (use street names, state road
numbers, , and distance and direction from a roadway intersection), The site is located off
R-1 f1 ', about 1 miles north of R-180Site i acCa �l b dirt ruacl off SR�1 �3 .
(A copy of to destiny map or USGS quad s t with facatrty cteady, i4rared oil the mare is ratclue to Oars 'sub acataxs WitT trats Apr tortata ni
) This NPDES permit application applies to which of the following
0 New or Proposed
Modification
Please describe the modification:
0 Renewal
Please specify existing permit number and original issue date:
) Does this facility have any cattier NPOeS permits?
No
Yes
If yes, list the permit numbers for all current f PD S permits for this facility;
6) Description of Discharges
) is the; discharge directly to the receiving water? Yes � a No
Page 1 of
1110

1t no, submit a site map with the pathway to the of nti l receiving waters dearly marked. 'this

) Receiving ng waters.
a) What is the name of the body or bodies of grater (creek, stream, river, lake. etc.) that the facility
wastewater discharges end up in? It the site wastewater discharges to a separate storm sewer
system (4S), name the operator of the 4S (e.g. City of Raleigh), South Fork Catawba liver
b) Stream Classification: -IV
9) Alternatives to Direct Discharge:
Address the feasibility of implementing each of the following non -discharge alternatives
a) Connection to a Municipal or Regional Sewer Collection System
) Subsurface disposal (including nitrification field, infiltration gallery, injection wells, etc.)
c) Spay irrigation
onnectl
outlined
For now
applicatli
) T5 r
local
b) Site
clew
) If thi
om
has
natives to discharge analysis should include boring Toga and/or other information indicating
asurfa e systern is neither feasible nor practical as well as written confirmation indicating that
an to a POTW is not an option. It should also include a present value of costs analysis as
n the Division's "Guidance For the Evaluation of Wastewater Disposal alteratives".
at Application Requirements,
ar proposed discharges, the following information must be included in triplicate with this
in or it will be returned as incomplete,
plete,
alnute series t. S S topographic map (or a photocopied portion thereof) vAth discharge
ion clearly indicated.
'nap, it the discharge is not directly to a stream, the pathway to the receiving stream roost be
ly indicated. This includes tracing the pathway of a storm sewer to itsdischarge paint.
a application is being submitted by a consulting engineer (or engineering firm), include
rnentation from the applicant showing that the engineer (Or firm) submitting the application
>een designated an authorized representative of the applicant:
ur k mcu plans for the treatment system (sf appicabel. he plans roust be s€gried and sealed by a
North Carolina registered Professional Engineer and stamped -'Final Design -Not of released for
construction".
a) Final specifications for all major treatment components (►f applicable), The specifications must be
signed and sealed by a North Carolina registered l rofessionat Engineer avid shall include a'
narrative description of the treatment system to be constructed.
I certify that I am familiar with the information containedin this application and that to the best of try
knowledge and belief such Information is true, complete and accurate.
Printed Name of Person Signing: David J. Rankin
Title: Regional Via'
(Signatu rcant) (Dale Signeri)
Page 3 of
11,107

NCG520000 N,
North Carolina
Any person vrt,
application, recc
or regulations c
falsifies, tamper
required to be
Management Cr
fine not to exce
Section 1001 lei°
than 5 gears, or 1
gat.
General Statute 143-215.6 i) provides that:
o knowingly snakes any false statement. representation, or certification in any
rd, report, plan or other document filer or required tobei'naintained cinder Article 21
,f the Environmental Management Commission implementing that Article, or who
i with or knowingly residers inaccurate any recording or monitoring device or method'
operated or, =maintained under Article 21 or regulations of the Environmental
midi ion implementing that Article, shall be guilty of a rnisder eanor punishable by a
ad $ 5,000, or by imprisonment not to exceed slx months, or by both, (18 tl S C.
)vides a punishment by a firm of not more than $ 5,000 or imprisonment not more
th, for a similar offense.)
must be accompanied by a check or money order for $100.00 mado payable do
NC r NR
Mail three (3) copies of the entire package to:
NPDES Permits Unit
Division of Water u lity
117 flail Service Center
Raleigh, North Carolina 79-1 1``
Final Checklist
El Alternatives analysis inducing prey
The submission of this document d
11,10
R
in and all supporting documents
ned and sealed y a forth Carolina P.E,
in this application
eat value of costs for all alternatives
Norte
ues not guarantee the issuance of an NPDES permit
Page 4 of

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784
1!, ENGINEERING & ENVIRONMENTAL
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SCIENCE COMPANY
coos PERSON O SuITE 10
..�� LEIGH, NORTH CAR
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{919} 701-7798
DATE:
// Vicinity Map
Scale 1 - 2000' Sand Pit #104 FTGUPE NO,
Gaston Co. NC I

2
ENGINEERING & ENVIRONT t l COMPANY
3008 AND RSON DRIVE, SUITE 102
RALEIG t, NO 27609
[phone]
November 11, 201
Mr. Robbie Robinson
Rea Contracting
8205 Wilkinson Blvd.
Charlotte, NC 2 214
RE Treatment System Design
Sand Fit # 104
Mine Permit No. 3-1
Gaston County, NC"
Dear Mr. Robinson.
Engineering c& Environmental Science Company (ES) has completed the Treatment
System resign for the above referenced.. site. Following is a discussion of the project
information and our evaluation.
GENERAL PROJECT INFORMATION
The Sand Fit # 14 is located in (Gaston County, north of Dallas, NC. The site is
accessed vie farm road off S R-1 0, about I mile north of SR-1 02 (See Attachment A,
Figure 1).
Approximately 8,000 tons of sand is removed twice a year from the South Fork Catawba
River in Gaston County. Approximately 405 lineal feet of stream is excavated with a
dragline. About 100 lineal feet of the strewn is in buffers. Excavation is only conducted
for half of the river adjacent to the stockpile area, and the excavation depth is no more
than six feet. `The excavated sand is then stored in a stockpile area until needed.
Erosion control is provided using perimeter betrns with stone outlet sections. No
dewatering will be conducted for this operation. because very little water is released b
the sand after excavation, no discharge will occur clue to the excavation process. The
small amount of water that i released by the sand will infiltrate the ground. Discharge
will only occur during runoff producing rain events at the two 2) stone outlet sections.
The receiving body of water is the South Fork Catawba River, which has a stream
classification of -lV (See Attachment A, Figure 2).

Upon completion of mining activities, the stockpile will be depleted and the site will be
graded for positive drainage and then re -vegetated. The ground will be sloped away from
the riverbank as per pre-existing conditions. The on -site roadway existed prior to the
mine activities and is used for farm equipment access. This roadway is flush with the
surrounding ground, and will remain in -place.
EROSION CONTROL EVALUATION
The SCS TR-55 method was used to evaluate the erosion control structures. The USDA
Soil Survey indicated that the majority of soils are Congaree loam, Hydrologic Group
(See .Attachment ). The erasion control evaluation indicated that the berms with stone
outlet can pass the 25-year, 24 hour rain event (See Attachment Q.
SETTLEMENT TREATMENT EFFICIENCY
Based on the 1 tl-year rain event and the surface area of each trap, the targeted minimum
particle sire is 31 microns and 38 microns for Traps 1 and 2, respectively. The excavated
material has more than.. 95% of the particle sues retained on the #200 sieve (7icron
particle size). Therefore, the settlement treatment efficiency is at least % (See
Attachment Q.
ALTERNATIVE ANALYSIS
Because no discharge occurs due to excavation, no alternative analysis is necessary.
CLOSURE
e appreciate serving you on this project. Please contact us if you have any questions.
Sincerely,
3'. Patrick Shillington E. t ,
V, k, President
R
Attachment A. Fiares,�F�.
Attachment B: USDA Soil Survey Map
Attachment C: Erosion Control and Settlement Calculations
2

Attachment As
Figures

Not to Scale

Attachment B
USDA Soil Survey Map

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Sail Map-GasMap—Gastom County,..Nortts Carolina
(Sand Fht 10a)
Natwal Resour Web Sable Surmy 1 1012010
Gems a "On oe Netionsf Cooperative Suds Survey Pogte 2 of 3
t

Soil Map -Gaston County, North Carolina Sand Pit 104
Map Unit Legend
Gaston county, koft l (NICOII)
map unit "bat Map unit Nam Acres in AOI Percent of AOI
CeS2 Cecil sandy c6ay team, 2 to 8 percent slopes, 46.3 26.3%
moderately eroded
CeD2 Cecil sandy clay team, 8 to 15 percent slopes, 14;6 8.3°
moderately eroded
11 Chewacta loans, 0 to 2 percent slopes, frequently 1 .7 7.2%
flooded
CoA Congareeloam, 0 to 2 percent slopes, occasionally 29.5 16.7°r
flooded
Mai Madison sandv loam 16 to 25 namaut stones 0.8 0.4%
PaD2 Pacolet sandy clay loam„ 8 to 15 percent slopes, 31.7 17.9%
moderately eroded
PaE Pacolet sandy loam, 15 to 25 percent slopes 28.6 16.2°
Ud Urforthents, loamy 0.1 0.0°h
w Water 140 6.8
Totals for area of Interest 176.4 100.0%
Natural Resources Web Sean survey W1012010
Conservation Service National Cooperative Soil survey page 3 of
2

Attachment Cs
Erosion Control and Settlement Calculations

RUNOFF CURVE
Project pit 104
County gaston Mate
Subtitle: basin no 1
COVER DESCRIPTION
-------------------------------------
?MPUT TION Version 2.10
User: tps Date: 18-01-2001
Checked: mate:
----------------------------------
Hydrologic Sail Group
A< S C D
Acres (CN)
----------------------------------
Vt=W.zy c u u aL=a qJ=sLV u.� vaaa.yl
Total Area (by Hydrologic Soil Group)
.
-------------------------------------------------------------------------------
TOT DRAINAGE AREA: .8 Acres
WEIGHTED CURVE HER: 8*
-------------------------------------------------------------------------------
* - Generated for use by GRAPHIC method
TIME OF CONCENTRATION AND TRAVEL TIME Version 2.10
Project pit 104
User: tps Date: 08-01-2001
County gastcn State: no Checked: mate:
Subtitle: basin no 1
-------------------------------------------------------------------------------
Flaw Type Length Slope Surface n
Area Wp Velocity Time
(ft) (ft/ft) code
(s/ft) (sft) (ft/sec) (hr)
-------------------------------------------------------------------------------
Shallow Concent°d 235 .005 a
0.057
Time of Concentration = 8.86*
Sheet Flaw Surface Codes
A Smooth Surface F Grass, Dense
- Shallow Concentrated
B Fallow (No Res.) G Grass, Surmuda
- Surface Codes
C Cultivated < 20 t Res. H Woods, Light
P Paved
D Cultivated > 20 t Res. I Woods, Dense
U Unpaved
E Grass -Range, Short J Range, Natural.
* -'Generated for use by GRAPHIC method

GRAPHICAL PEAK DISCHARGE METHOD Version 2.10
Project pit 104 User: tps late: 08-01-2001
County gas on State: nc Checked; Date
Subtitle: basin no 1
rl4p �
Data: Drainage Area * Acres
Runoff Curve Number 86 *
Time of Concentration: 0.06 * Hour
Rainfall Type II
Pond and Swamp Area. NONE
Storm Number j 1 2�
_------ ------
Frequency (yrs) 10 ( 25
-Hr Rainfall (in) 5.6 6.5
1 /P Ratio 0.06 9,05
I I I I
Used. 0.10 0.10
1 I I I
Runoff (in) 4.03 4.89
! I I I
Unit Peak Discharge 11.794 11.794 1
(cfslacre/in)
Pond and Swamp Factorl 1.00 ( 1.00 1
0.4 Ponds used I I I
�_ _ _ ------
Peak Discharge (fs) 6 7
* _ Value(s) provided from TR- 5 system routines

RUNOFF CURVE BER COMPUTATION Version 2.10
Project pit 104
User: tps Date: 0-01=2001.;
County a gaston State: no
Checked: Date
Subtitle; basin no
( 6r op
Hydrologic Soil Group
COVER DESCRIPTION
A B C D
Acres (CN)
-------------------------------------------------------------------------------
DEV LOPING URBAN A (No Vegetation)
Newly graded area. (pervious only)
.4(86)
Total Area (by Hydrologic Sail Group)
.4
-------------------------------------------------------------------------------
TO DRAINAGE AREA: .4 Acres
WEIGHTED CURVENUMBER: 06*
* - Generated for use by GRAPHIC method'
TIME OF CONCENTRATION AND TRAVEL TIME Version 2`.10
Project pit'104
'User. tps Date. 08-01.2001
County e gaston State: no
Checked: Date -
Subtitle: basin no 2
-------------------------------------------------------------------------------
Flow Type Length Slope Surface
n Area. Wp Velocity Time
(ft) (ft/ft) code
(sq ft) (ft) (ft/sec) (hr)
-------------------------------------------------------------------------------
Shallow Concentrd 100 005 a
0.024
Time of Concentration = 0.02*
Sheet Flow Surface Codes -
A Smooth Surface F Grass, Dense
- Shallow Concentrated
B Fallow (No Res.) G Gast Burmuda Surface Codes
Cultivated < 20 % Res. H Woods, Light
P Paved
D Cultivated > 20 % Res. I Woods, Dense
U Unpaved
E Grass -Range, Short J Range, Natural
* Generated for use by GRAPHIC method

GRAPHICAL PEAK
Project. pit 104
County gaston State:'
Subtitle: basin no 2
(trot I
Data: Drainage Area .4 *
Runoff Curve Number 86 *
Time of Concentration: 0.02
Rainfall Type II
Pond and Sump Area NONE
Storm Number 1 2
------
Frequency (yrs) 10 25
- Hr Rainfall (in) 5.6 6.5
i I 1
I/P Ratio 0.06 0.05
I I I
Used j' 0.10 0.10
Runoff (in) 4.03 4<89
I � I
j Unit Peak Discharge 12.08312.083
(cfs/acre/in) I
Pend and Swamp Factorl 1.00 1 1.00
0 , 0 Ponds Used I I
_ __ __
Peak Discharge (cfs) 3 4
SCHARGE METHOD Version 2.10
User: tps Date:'08-01-2001
Checked: bate:
es
ours`
•

Sand Pit # 104 Erosion Control Evaluation
From R-55 results, the peak flow rates are:
Flow Rate (cfs)
Trap I Trap 2
10-yr 6
25-r 7 4
Need 45 sf storage surface area for every 1 cfs of flow
Trap 1
Trap 2
435sflcfs*6cfs=2610 sf
435sflcfs*3cfs=1 05 sf
Actual surface
area available:
'crap 1
Trap'2
ft*15ft=3525 sf
100ft*15ft=1500 sf
3625>2610, area is ok
1500>1 05, area is ok
• 20ft wide crestf and using the -.
peak flow- over the crest i&
ITr.•
�H=(7/(3*20))II2/3=U4 N { • ft
��Use weir depth of 1
2

Settlement Treatment Efficiency
IMIMINIMMEME Factor of Safety (FS)=1.2
A=Area
Area (sf) 3525 V=Fall Velocity (ft/s)
Q Flow Rate (ft^3/s)
A=(1.2-Q) Flow rate is based on 10-year Rain Event
Q=6 ft"3/s
V(1:2-Q)/A
V=(1.2*6)/352
V=0.0024
From attached figure, assuming 59 degree F water temperature, then target
particle size is 0.031 mm (1 micron)
9 % of the particle sizes of the material excavated is retained on the
00 sieve (4 micron particle size). Therefore, the basin collection
efficiency is at least 9 %
2