WQ0004268_PAN Question_20080523

c. c. r ou ..
Re: Allon's Canning Company PAN question
SA Sd`ti
Subject: Re: Allen's Canning Company PAN question - GV %Ct y z 6 9
From: Jim Barber <[e-mail]>
Date: Fri, 23 May 2008 09:53:31 -0400
To: Art Barnhardt <[e-mail]>
CC: Mark Allen <[e-mail]>, Joel Shields <[e-mail]>
Mark;
I believe the MR for Allen Canning PAN calc. should be 0.40 I've attached some
guidance documents to address.
IfI may inquire. Are you working for/with Eric Lappala. of Eagle Resources on this
project? If so, please forward this email to him and/or verify with him that the MR
of 0:40 is the number utilized to calculate the PAN loading rate. If it is not, then
justification needs to be provided as to why a alternate number is being utilized.
If you have any questions, please 'give me a call at 910-433-3340.
Jim Barber
Art Barnhardt wrote:
Jim may know. I am not that familiar with the system. He will look into it.
ArtB.
Mark Allen wrote:
Art,
Our firm has been contracted by Allen's Canning Company in Sampson County to
try to expand upon their current wastewater application system and I'm
involved in completing the agronomic evaluation for the .2t regs. I haven't
been able to nail down nitrogen mineralization rates that were used for
determining PAN rates for permitting the existing wastewater stream. From
talking to the project engineer, it sounds like the wastewater undergoes
anaerobic treatment in the final holding lagoon. With this info, I'm inclined
to use a,nitrogen mineralization coefficient of 20-30%. Is that in the
ballpark for what has been permitted out there in. the past? The permit number
is WQ0004268. Thanks for your help.
Mark Allen
North Carolina Licensed Soil Scientist
**Soil and Environmental Consultants, PA**
**11010 Raven Ridge Road**
**Raleigh****, NC 27614**
**office direct ph. [phone]**
**mobile. [phone]**
**general office ph. [phone]**
**Nextel radio code. 150*26*44786**
**fax: [phone]**
Content -Type: application/pdf
D00052308.pdf
Content -Encoding: base64
1 of 2
5/23/2008 9:56 AM

Re: Allen's Canning Company PAN question
I
ID00052308-001.pdf
Content -Type: application/pdf
Content -Encoding: base64
r
2 of 2 5/23/2008 9:56 AM

Plant` Available Nitrogen
•
Some spray irrigation systems handle wastewater with high nitrogen concentrations:
'These systems need. to . base wastewater application': rates on. supplying crop nitrogen
needs rather than on the amount of water the soil can handle . Permits for nitrogen
limited systems have PAN monitoring requirements..:<Plant available .nitrogen. is
calculated as follows: .
PAN = [MR x (TKN — NH3)] + [(1-VR) x (NH3)] + [NO3 + N0i]
PAN Plant. Available Nitrogen
MR = Mineralization Rate= "
VR = Volatiiization"Rate
TKN =Total Kjeldhal Nitrogen
NH3 =•Ammonia Nitrogen.Concentration
NO3=.Nitrate Nitrogen•Concentration
NO2= Nitrite Nitrogen Concentration
VR = 0.50:for all treatment types
MR = 0.4 for primary treatment
0.3 for aerated lagoons and,sand filters
0.2 for aerobic treatment/activated sludge systems
PAN Formula Simpllfiestoc '
-.PAN;= [MR x.(TKN - ;NH3)].+40.5 x:' (NH3)].+ [NC% + NO2]
6-27

. . .
Example
1794 are, .; spray .,•.. . „ • .••
concentrations: •
Ammonla\18 mg/L
Nitrate 10,5 mg/L
• Nipiitoi. 0.5 mg/L
Assume a Mineralization rate of 9.40. How much PAN are you applying per year to
each acre?
•
•
PAN'Li [MR x (TK.N --NH3)] + [0.5 x (NH3)] 4-.[NO3+ NO2] • : /.•••. • •
PAN = [(0.40) (56 - 18)] + [(0.5) (18)] + [10.5 + 0 51•
PAN = (0.40) (38) + 9 + 11
• . -• ,•
PAN = 15.2 +.9 + 11 352 mg/L PAN
Now, we need to convert mWLto lbs using the formula:
. . :
Pounds = concentration (mg/L) x Flow (million gallons per day): x 3.341b/g41 -
To do this we first need to convert our hydraulic soils lciadinirke (HSLR '(in/year)) to
flow (in million gallons per day).
Flow = (15 in/acre) (27,152 gallons/acre-inch) (1 acre) = 407,280 gallons/acre
= 0.407 MG/acre
. We can now solve for lbs PAN per year on each acre:
Lbs PAN/acre = (35.2 mg/L PAN) (0.407 MG/acre) (8.34 lb/gal)
119.5 lbs/acre PAN on each acre
6-28

Formulas for Land -Based Water Pollution_ Control Systems
Area of Square or Rectangle (ft2) = length x width
Area of Circle (ft2) = -3.14 x radius2 = 7E x radius2 = 7E r2
Volume of Rectangular Tank (ft3) = length x width x depth
Volume of Cylindrical Tank (ft3) = area x height =. 7E r2 x h
Volume of Tank (gal) = volume of tank (ft3) x 7.48 gal/ft3
Detention Time (unit of time) = volume (gallons or ft3)
flow (volume/unit of time)
Pounds per day (Ibs/day) = concentration (mg/L) x flow (MGD) x 8.34 lb/gal
Pounds per year (Ibs/year) = mg/L x MGY (annual effluent application) X 8.34 lb/gal
Concentration (mg/L) = Ibs flow (MGD) x° 8.34 lb/gal
Dryweight concentration m /k mgli 9 ( g g) >:_ .. %solids ,
Wet weight concentration (mg/L) rng/kg X % solids
Pounds per dry ton = mg/kg X .002
Gallons
Dry tons X 2000 Ibs/ton
8.34 Ibs/gal .X % solids
Flow Rate (volume/unit-time) = area (ft2) x velocity (feet per minute)
Hydraulic Loading Rate (gpd/ft2) =
Hydraulic Soils Loading Rate (in/day) =
Horsepower =
Pump Delivery Rate =
flow (gpd)
area (ft2)
flow (gpd).
27,152 gal/acre-inch x area (acres)
flow (gpm) x total dynamic head (TDH)
3960 x pump efficiency x motor efficiency
volume pumped .(gal)_
Pump Delivery Rate Efficiency (%) =
pump run time
Measured pump delivery rate (gpd)
design pump delivery rate (gpd)
1
X 100

T•
•
Plant Available Nitrogen (PAN) = [MR x (TKN — NH3)] + [0.5 x (NH3)] + [NO3.+ NO2]
where: MR = Mineralization Rate
TKN = Total Kjeldhal Nitrogen
Sodium Adsorption Ratio (SAR) =
• Na (meq)
V 0.5 x (Ca (meq) + Mg (meq))
Exchangeable Sodium Percentage (ESP) _
milliequivalent (meq) =
Site Life =
Na (meq) x 100
CEC (meq)
concentration
equivalent weight
Allowable Cumulative Pollutant Loading
Annual Pollutant Loading
Precipitation rate for =
stationary sprinklers (in/hr)
Time of Operation (hours) =
Application depth for
traveling gun sprinkler (in) =
96.3 X discharge rate (gpm)
sprinkler spacing (ft) X lateral spacing (ft)
target application depth (in)
precipitation rate (in/hr)
19.3 x sprinkler discharge rate (gpm)
lane spacing (ft) X travel speed (in/min)
96.3 x sprinkler discharge rate (gpm) 360
Precipitation rate for = X
traveling gun sprinklers (in/hr) 3.14 x [0.9 x sprinkler radius (ft)]2 w
Travel speed (in/min)
19.3 x sprinkler discharge rate (gpm)
lane spacing (ft) X application depth (in)