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Discharge Calculations
The total rainfall for the 04/28/13 storm during which samples were collected at this facility was 1.39
inches. We will use generally accepted estimates of the run-off coefficient of C= 0.95 for impervious
areas and C=0.40 for pervious areas.
Stormwater Discharge Outfall 001
Pervious Area= 1.32 Acres* Impervious Area= 1.87 Acres*
Qt=CRA(0.027) Qt=CRA (0.027)
Qt= (0.40)(0.19)(0.86)(0.027) Qt= (0.95)(0.86)(1.87)(0.027)
Qt= 0.002 MG Qt= 0.041 MG
Qtotal =0.002 +0.041 =0.043 MG
Stormwater Discharge Outfall 002
Pervious Area=0.15 Acres* Impervious Area=0.50 Acres*
Qt= CRA (0.027) Qt= CRA(0.027)
Qt= (0.40)(0.86)(0.15)(0.027) Qt=(0.95)(0.86)(0.50)(0.027)
Qt=0.0014 MG Qt=0.011 MG
Qtotal = 0.0014+0.011 =0.012 MG
Stormwater Discharge Outfall 003
Pervious Area= 0.91 Acres* Impervious Area=0.44 Acres*
Qt=CRA (0.027) Qt=CRA(0.027)
Qt= (0.40)(0.86)(0.91)(0.027) Qt=(0.95)(0.86)(0.44)(0.027)
Qt= 0.008 MG Qt= 0.010 MG
Qtotal = 0.008 + 0.010= 0.018 MG
Stormwater Discharge Outfall 004
Pervious Area=2.3 Acres* Impervious Area= 1.8 Acres*
Qt=CRA (0.027) Qt=CRA(0.027)
Qt= (0.40)(0.86)(2.3)(0.027) Qt= (0.95)(0.86)(1.8)(0.027)
Qt= 0.021 MG Qt= 0.040 MG
Qtotal= 0.021 + 0.040=0.061 MG
*Drainage areas taken from site drainage map prepared by Espe Houston&Associates
page 2 of 2

Stormwater Discharge Calculations
JOWAT CORPORATION
2013 Calendar Year
Rationale for Discharge Calculations
The rational formula is used for the basis of the calculations. The rational formula has been developed
to calculate the rate of run-off from a rain event of a given intensity over a given area. The formula is
written:
Q =CiA
where: Q is the rate of run-off flow in cubic feet per second (CFS)
i is the rain intensity in inches per hour
A is the land area contributing run-off to the discharge point
and: C is a run-off coefficient which ranges from 0 for a completely pervious surface to 1.0
for a completely impervious surface.
The rational formula results from the fact that, for a completely impervious surface, a rainfall of one
inch over a period of one hour on an area of one acre will result in a run-off discharge of one CFS. The
run-off coefficient (C) can be thought of as a correction factor based on the percentage of the total
rainfall which will run off from a given area due to how pervious or impervious the surface of that area
is. Since the discharge permit for this facility requires an estimate of the total discharge from the storm
event during which samples are collected, we will use a modified form of the rational formula to
calculate the total discharge as follows:
Qt=CRA(0.027)
where: Qt is the total discharge in Million Gallons
C is the run-off coefficient as defined above
R is the total amount of rainfall in inches
A is the surface area contributing flow to the sample location
and: The constant 0.027 in the modified equation corrects the units to Million Gallons (MG)
based on the following
1 acre-ft. =43,560 ft3
1 acre-inch=43560/12=3630 ft3
1 ft3 = 7.48 gallons
Thus 1 acre-inch= 3630 (7.48 gal/ft3 / 106 gal/MG)
1 acre-inch=0.027 MG
page 1 of 2

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ARESEARCh & ANA[yTICA[ •
LABORATORIES, INC.
Analytical/Process Consultations
18 October 2013
Mr. Martin Lamberg
Chemical Engineer
Jowat Corporation
P.O. BOX 1368
High Point North Carolina 27261
Dear Mr. Lamberg:
Research & Analytical Laboratories, Inc. (RAL) has completed the analyses of the four stormwater
samples collected by your personnel on 10/07/13. We have prepared a reporting form which
approximates the DMR forms used by the state for some other stormwater permits. It is our
understanding that the state has not issued a standard DMR form for your facility.
The following materials are enclosed:
1. The completed reporting form
3. Our calculations for the total discharge at each outfall from the storm event on
04/28/13.
3. Certified Laboratory data reports for the four samples
4. Copies of the chain of custody documentation for the four samples
The above information should be submitted to the Division of Environmental Management in
accordance with your permit.
If there are any questions or if we may be of further assistance in any way,please advise.
Sincerely,
RESEARCH&ANALYTICAL LABORATORIES,INC.
/4A
Sidney L Champion
Executive Vice-President/Director of Laboratory Services
cc: Jim Cheshire
P.O. Box 473 • 106 Short Street• Kernersville, North Carolina 27284•336-996-2841 •Fax [phone]
www.randalabs.com

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RESEARCII & ANALyTICA1 •''`'`'�. `�',�'r
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LAbORATORIES, INC. =Pfy Ne#34 zi
Analytical/Process Consultations rr"ric9j!RF yg�5,..�
�ri,tE,,*fll ots
October 18,2013
Jowat Corporation
PO Box 1368
High Point, North Carolina 27261
Attention: Mr. Martin Lamberg
Chemical Analysis for Stormwater Sampling identified as Jowat Corporation -Outfalls 001-004
I. Project Number: N/A NPDES#: NCG080000
Sample RAL Sample Sample Total pH Date
Identification Sample Date Time Suspended Analyzed
Number Solids
Outfall# (mg/L) (SU)
001 769966 10/07/13 1000 267 6.46 10/11/13
002 769967 10/07/13 1005 13.0 6.30 10/11/13
003 769968 10/07/13 1010 20.0 6.16 10/11/13
004 769939 10/07/13 1015 94.0 6.40 10/11/13
Analyst: YJ, AP
mg/L = milligrams per Liter=parts per million(PPM) <=less than or Below Quantitation Limit(BQL)
SU =Standard Units N/A=Not Available

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LABORATORIES INC. �� +4 "Ts.$,=
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Analytical/Process Consultations `
~1:,Ce;,5°!Redd,'`„, e
October 18,2013
Jowat Corporation
PO Box 1368
High Point, North Carolina 27261
Attention: Mr.Martin Lamberg
Chemical Analysis for Stormwater Sampling identified as Jowat Corporation - Outfalls 001 - 004
1. Project Number: N/A NPDES#NCG080000
Quantitation Outfall Outfall Outfall Outfall
Limit 001 002 003 004
Parameter (mg/L) (me/L) (mg/L) (mg/L) (me/L)
Total Suspended Solids(TSS) 5.00 267 13.0 20.0 94.0
pH(SU) N/A 6.46 6.30 6.16 6.40
Sample Number 769966 769967 769968 769969
Sample Date 10/07/13 10/07/13 10/07/13 10/07/13
Sample Time 1000 1005 1010 1015
Rainfall 0.86 in.
Event Duration 2 hr.
Results of Visual Monitoring of Stormwater Outfall Identified as Outfalls 001 -004
at Jowat Corporation
1I. Project Number:N/A NPDES#NCG080000
Stormwater Monitoring Monitoring Monitoring Monitoring
Discharge Monitoring Location Location Location Location
Charteristics Frequency Type Outfall 001 Outfall 002 Outfall 003 Outfali 004
Color Semi-Annual Visual Orange Clear Semi-Clear Semi-Clear
Odor Semi-Annual Visual None None None Earthy
Clarity Semi-Annual Visual Murky Clear Turbid Turbid
Floating Solids Semi-Annual Visual None None Yes Yes
Suspended Solids Semi-Annual Visual None None None None
Foam Semi-Annual Visual None None None None
Oil Sheen Semi-Annual Visual N/A N/A N/A N/A
Other obvious
on idicators of
stormwater pollution
mg/L = milligrams per Liter=parts per million(ppm) BQL=Below Quantitation Limits
<=less than or Below Quantitation Limit(BQL) SU=Standard Units