720014_ENFORCEMENT_20171231

NORTH CAROLINA
Department of Environmental Qual

ENFORCEMENT
ENFORCEMENT
ENFORCEMENT

14 CLIJil, A,
NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
Mr. Larry Stallings
Larry. & Barbara Stallings Farm
779 Turnpike Rd
Belvidere, North Carolina 27919
Division of Water Quality
Charles Wakild, P. E.
Director
Aquifer Protection Section
March 6, 2013
Subject: NOTICE OF DEFICIENCY
Larry & Barbara Stallings Farm #72-14
AWS720014
Perquimans County
NOD-2013-PC-0107
Dear Mr. Stallings:
John E. Skvarla, III
Secretary
On February 27, 2013, during a telephone conversation with staff of the NC Division of Water Quality
(DWQ) Aquifer Protection Section (APS), you reported a high freeboard level (approximatelyl8 inches) in
the primary lagoon,
As a result of this incident, you are hereby notified that, having been permitted to have a non -discharge
Permit for the subject animal waste disposal system pursuant to 15A NCAC Section .1300, you have
been found to have insufficicent freeboard in accordance with your Certified Animal Waste Management
Plan and The Swine Waste System General Permit No. AWG100000 that you are covered to operate
under, as follows:
Deficiency 1:
Failure to Maintain waste levels in your lagoon /storage ponds in accordance with the facility's Certified
Animal Waste Management Plan and in accordance with Condition V.2. Of Swine Waste System General
Permit No. AWG100000.
On February 27, 2013 a lagoon/storage pond level was documented at approximately 18 inches of
freeboard at the primary lagoon. A level of 19 inches is the maximum level allowed by your permit and
Certified Animal Waste Management Plan.
Aquifer Protection Section
943 Washington Square Mall, Washington, North Carolina 27899
Phone. [phone]EAK 252-975-3716
Internet: www.ncwateEguality.org.
NonrthCarohna
Aaturdly
An Equal Opportunity 1 Affirmalive Action Employer

Cont. Page Two
March 6, 2013
Larry & Barbara Stallings Farm
Required Corrective Action for Deficiency 1:
Submit a 30 Day Plan of Action (POA) to DWQ within 2 days of the high freeboard occurrence. Take all
necessary additional steps to insure lagoon levels remain in compliance with Section 2 of your permit.
You are required to take any necessary action to correct the above deficiency. A written response to this
notice should be provided within 30 days of receipt of this letter. Please include in your response all
corrective actions already taken and a schedule for completion of any corrective actions not addressed.
If you have any questions concerning this Notice, please contact Travis Smith at (252)-948-3942 or me at
[phone].
Sincerely,
'mot j -141 A--)
David May
Regional Aquifer Protection Supervisor
Washington Regional Office
Cc: Keith Larick CAFO Unit
Perquimans County Soil and Water Conservation District
N/CDSWC-WaRO
JMaRO Compliance Animal Files
Murphy Brown

JALF Ji3 5A
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality -
Beverly Eaves Perdue
Governor
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
CM# 7009 0080 0000 5655 4782
Mr. Larry Stallings
779 Tpke Road
Belvidere, North Carolina 28585
Coleen H. Sullins Dee Freeman
Director Secretary
November 20, 2009
Subject: NOTICE OF DEFICIENCY .
Larry & Barbara Stallings Farm #72-14
A WG720014
Perquimans County
NOD-2009-PC- 093 7
Dear Mr. Stallings:
On November 19, 2009, during a telephone conversation with staff of the NC Division of Water
Quality (DWQ) Aquifer Protection Section (APS), you reported a high freeboard level (17 inches) in
the primary lagoon.
As a result of this incident, you are hereby notified that, having been permitted to have a non -discharge
permit for the subject animal waste disposal system pursuant to 15A NCAC Section .1300, you have
been found to be in violation of your Certified Animal Waste Management Plan and the Swine Waste
System General Permit No. AWG100000 that you are covered to operate under, as follows:
Deficiency 1:
Failure to maintain waste levels in your lagoon/storage ponds in accordance with the facility's Certified
Animal Waste Management Plan in accordance with Condition V. 2. of Swine Waste System Gencrall,,
Permit No. AWG 100000
On November 19, 2009 a lagoon/storage pond level was documented at 17 inches of freeboard at the
primary lagoon. A level of 19 inches is the maximum level allowed by your permit and Certified
Animal Waste Management Plan.
North Carolina Division of Water Quality Intemet: www.ncwaterguality.org
943 Washington Square Mall Phone: [phone]
Washington, NC 27889 FAX [phone]
NorthCarolina
Naturally
An Equal Opportunity/Affirmative Action Employer - 50% Recycledll0% Post Consumer Paper

Cont. Page Two
November 20, 2009
Stallings Farm
Required Corrective Action for Deficiency 1:
Submit a 30 Day Plan of Action (POA) to DWQ within 2 days of the high freeboard occurrence. Take
all necessary additional steps to insure lagoon levels remain in compliance with Section 2 of your
permit.
You are required to take any necessary action to correct the above violations on or before
December 19, 2009 and to provide a written response to this Notice within 30 days of receipt of
this letter indicating that freeboard is at a compliant level. Please include in your response all
corrective actions already taken and a schedule for completion of any corrective actions not addressed.
If you have any questions concerning this Notice, please contact Marlene Salyer at (252)-948-3846 or
me at [phone].
Sincerely,
(jl')av�
I
. - -
David May
Regional Aquifer Protection Supervisor
Washington Regional Office
cc: Keith Larick CAFO Unit
Perquimans County Soil and Water Conservation District
N¢DSWC-WaRO
aRO Compliance Animal Files
Murphy Brown, Waverly VA
mds Files

i J
tl
N. C. Division of Water Quality
943 Washington Square Mall
Washington, N. C. 27889
Attention: Mr. David May
Dear Mr. May:
779 Turnpike Rd.
Belvidere, N. C. 27919
Facility Number 72-14
November 23, 2007
This correspondence is in response to your letter to me dated November 7, 2007
regarding the violation of my calibration procedures. The calibration procedures used by
me on the solid set system was to verify the pressure at the last sprinkler and make sure it
was at the level that the system was designed for. The pressure was adjusted, recorded,
and installed in the book with the irrigation records. According to the attached
information that Eric forwarded to me, this was insufficient. We are in the process of
purchasing several rain gauges and will install them in the manner that is suggested by
the cooperative extension service to calibrate the solid set system. We should be doing
this in the next few weeks on our cover crop.
The hose traveler/irrigation gun has only been used by us one time. This was done by us
during the spring of 2007. We used an in -line meter to record the number of gallons that
we sprayed on a specific field. We will initialize use of the rain gauges the next time we
spray using the hose traveler/irrigation gun.
In the use of the honey wagon, we did not use any means of calibration other than the fact
that the tank held 2000 gallons and we applied the liquid to a specific amount of acreage.
It used the knife system on the honey wagon to incorporate the liquid into the ground.
With the incorporation of the waste into the ground, we do not know how to calibrate the
honey wagon. The Soil and Conservation people did not have any idea as to how to do
this. Our intention is to never use the honey wagon again.
We do not know what to do concerning the replacement of the marker. What marker are
you referring to? Is it the marker in the lagoon? If this is the marker you are referring to,
it was installed by the Carroll's people and lined up with the marker that was'originally
installed by the Soil and Conservation people. Please advise us concerning this matter.-_---,
�I
. IF Nov 30 2007 L�

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CERTIFIED MAIL,, RECEIPT
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. MR LARRY STALLINGS
_ 779 TPKE ROAD ;+
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We hope this explains to you what we did in the past and the corrective actions we will
undertake to rectify the calibration procedures. Please advise us if we have not supplied
the information needed and if the corrective actions are insufficient.
Sincerely,
Lary Stallings

�3F WATE9 Michael F. Easley, Governor
`� Q� William G. Ross Jr., Secretary
r North Carolina Department of Environment and Natural Resources
� y
Q '�'' `- Coleen H. Sullins, Director
Chuck Wakild, PE, Deputy Director
Division of Water Quality
AQUIFER PROTECTION SECTION
November 7, 2007
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
CM# 7007 0220 0003 1480 6491
Mr. Larry Stallings
Larry & Barbara Stallings Farm
779 Turnpike Road
Belvidere, NC 27919
RE: Notice of Violation
Animal Operation Compliance
Larry & Barbara Stallings Farm
`P"��tier72= 1
� er uimans-Chun .
NOV-2007-SP-0023
Dear Mr. Stallings:
This letter is to notify you that facility number 72-14 is in violation of its CAWMP and North
Carolina Administrative Code Subchapter 15A NCAC 2T Section .1300 for failure to provide and keep
onsite the required 2006 wastewater irrigation calibration results for your farm. Eric Newsome from the
Washington Regional Office of the Division of Water Quality conducted an annual inspection on October
26, 2007 at your facility in Perquimans County. Enclosed is a copy of the inspection report for your
review.
In general, the puipose of the inspection was to verify whether: (1) the lagoon is being maintained
such that there are no signs of seepage, erosion, and/or runoff; (2) the farm has a Certified Animal Waste
Management Plan (CAWMP); 3) the farm is complying with requirements of the State Rules under 15A
NCAC 2T .1300; 4) the farm operation's waste management system is being operated properly under the
North Carolina Division of Water Quality Internet: wNvw.ncwater uali ,.ice
943 Washington Square Mall Phone (252) 946-WI
Washington, NC 27989 Fax [phone]
NorthCarolina
Naturali'm
An Equal OpportunitylAtfirmative Action Employer— 50% Recycledl10% Post Consumer Paper

'Cont. Page TWO
November 7, 2007
Larry & Barbara Stallings Farm
Facility # 72-14
direction of a Certified Operator, and; 5) the required records are being kept. The following violations
were noted during the inspection:
• In accordance with condition II, item 24 of your Permit, all waste application equipment must be
tested and calibrated once in the first two years after issuance of the COC and then at least once
every two years thereafter. Based on the COC issue date of 10/1/2004, the first calibration of the
irrigation system was to have occurred on or before 9/30/2006. At the time of this facility
inspection, no results for this first calibration could be produced for the solid set, the hose
traveler/irrigation gun, or the honeywagon systems in use prior to this inspection date.
The Permittee shall provide to this office within thirty (30) working days from receipt of this
violation notice a written explanation for these violations, a corrective action plan that ensures that the
violations do not recur, and a deadline by which the current marker will be replaced. Your explanation will
be reviewed and be advised that if these violations continue, the Division will send recommendation for
enforcement action to the Director of the Division of Water Quality.
It is very important as the owner and/or Operator in Charge that the aforementioned
violations/deficiencies and any other problems that may arise be resolved, as soon as possible. Enclosed
are copies of acceptable calibration methods, published by the North Carolina Cooperative Extension
Service, which may be of use in this matter. For additional assistance, please contact your county
Technical Specialist.
Thank you for your assistance and cooperation during the inspection. If you have any questions
concerning this matter, please contact me at 252-948-3939, or Eric Newsome, 252-948-3942.
Sincerely,
2A4-4 e-Da U 10 Ay
David May
Aquifer Protection Regional Supervisor
Washington Regional Office
Cc: Perquimans County Soil and Water Conservation District
NCDSWC-WaRO
Aquifer Protection Animal Central Files
6a1.O—Compliance=Animal-Files

E Division of Water Quality
n Division of Soil and Water Conservation
❑ Other Agency
Facility Number: Z20014 Facility Status: Active Permit: AWS.720014 ❑ Denied Access
Inspection Type: Qomoliance InspectiQn
Inactive or Closed Date:
Reason for Visit: Routine
County: Perguimans
T_ Region: Washington
Date of Visit: 10/26/2007 .
Entry Time: 1:13 AM
Exit Time:
Incident M.
Farm Name: Larry &_Barbarg
Stallings Form
Owner Email:
Owner: Larry Stalling_s
_
Phone: [phone]
Mailing Address: 779 IDEe Rd
BelvidereC 7 1 747
Physical Address:
Facility Status: ❑ Compliant
❑ Not Compliant
Integrator.
Locatlon of Farm;
Latitude:
36°21'13" Longitude: 76°27'31"
3 miles North of intersection of Sandy Cross Rd. and Turnpike Rd. on Turnpike Rd., SR 1001 in Perquimans County.
Question Areas:
Discharges & Stream Impacts Waste Collection'& Treatment Waste Application
Records and Documents Other Issues
Certified Operator: Joseph L Stallings Operator Certification Number: 19375
Secondary O1C(s):
On -Site Representatives); Name Title Phone
On -site representative Larry Stallings Phone:
24 hour contact name Larry Stallings Phone:
Primary Inspector: Eric Newsome Phone:
Inspector Signature; Date:
Secondary Inspector(s):
Page: 1

Permit: AWS720014 Owner - Facility: Larry Stallings Facility Number: 720014
Inspection Date: 10/26/2007 Inspection Type: Compliance Inspection Reason for Visit: Routine
Inspection Summary:
Saw CoC and Permit (AWG100000).
Latest WUP signed 8110/2006: T722 (Fields 1-4), SB w/ cover crop; T726 (F1=Bermuda, F2-F4=Fescue, F5-7=Corn w/ cover crop).
Waste Analysis Results revealed a sharp increase in the Nitrogen level from 2.8 lb/1000gal (Feb 2007) to 4.5 Ib/1000gal (May 2007),
Continue to monitor this situation and consider comparing measurements at individual points in the lagoon.
Reviewed iRR1 and IRR2 forms; PAN limits were complete and balanced. Will give farmer a copy of the combined IRR1/IRR2 form.
Solid set system is an the Fescue and Bermuda fields; reel and gun system is used on the remaining fields.
Saw the lagoon sludge surveys for 9/30/2006 and 9115/2007, both performed by Mr. Stallings with identical readings: Thick=3.50',
LTZ (estimated)=6'
Soil test results seen for 2006 (online): 2 Ton1Ac of lime needed; Znl-393, Cul-61 (acceptable values, but continue to monitor). Lime
applied since 2006 report. Need to conduct a soil analysis for 2007.
##24. No calibration results provided for the solid set, irrigation reel/gun system, or the honeywagon. Current practice with the reel is
to attach a Flowmeter and.multiply the time run by the average rate; this provides the total gallons irrigated. Copies of proper
calibration techniques to be sent for the three systems.
Lagoon freeboard records and the rainfall records reviewed. Freeboard increases are consistent with pumping events.
Page: 2

Permit: AWS720G14 Owner- Facility: Larry Stallings Facility Number: 720014
Inspection Date: 10/26/2007 Inspection Type: Compliance Inspection Reason for Visit: Routine
Regulated Operations Design Capacity Current Population
Swine
Q Swine - Feeder to Finish 560 586
Total Design Capacity: 560
Total SSL.W: 75,600
Waste Structures
Type Identifier Closed Date Start Date Designed Freeboard Observed Freeboard
�aqoon L1 19.00 26-00
Page: 3

Permit: AWS720014 Owner - Facility: Larry Stallings Facility Number: 720014
Inspection Date. 1012612007 Inspection Type: Compliance Inspection Reason for Visit: Routine
Discharges & Stream Impacts Yes No NA NE
1. Is any discharge observed from any part of the operation? ❑ ■ ❑ ❑
Discharge originated at:
Structure ❑
Application Field n
Other In
a. Was conveyance man-made? ❑ ®❑ ❑
b. Did discharge reach Waters of the State? (if yes, notify DWQ) _ Cl ■ ❑ ❑
c, Estimated volume reaching surface waters?
d. Does discharge bypass the waste management system? (if yes, notify DWQ) ❑ ■ ❑ ❑
2. Is there evidence of a past discharge from any part of the operation? ❑ ®❑ ❑
I Were there any adverse impacts or potential adverse impacts to Waters of the State other than from a ❑ ■ ❑ fl
discharge?
Waste Collection, Storage & Treatment
Yes
No
NA
NE
4. Is storage capacity less than adequate?
0
■
n
n
If yes, is waste level into structural freeboard?
❑
5. Are there any immediate threats to the integrity of any of the structures observed (I.e./ large trees, severe
❑
®❑
❑
erosion, seepage, etc.)?
6. Are there structures on -site that are not properly addressed and/or managed through a waste management ❑
®
❑
❑
or closure plan?
7. Do any of the structures need maintenance or improvement?
n
®❑
n
8. Do any of the structures lack adequate markers as required by the permit? (Not applicable to roofed pits,
n
- ■
n
n
dry stacks and/or wet stacks)
9. Does any part of the waste management system other than the waste structures require maintenance or
❑
■
❑
n
improvement?
Waste ApRfication
Yes
No
NA
NE
10. Are there any required buffers, setbacks, or compliance alternatives that need maintenance or
❑
®
❑
❑
improvement?
11. Is there evidence of incorrect application?
n
p
Q
n
If yes, check the appropriate box below.
Excessive Ponding?
n
Hydraulic Overload?
❑
Frozen Ground?
❑
Heavy metals (Cu, Zn, etc)?
n
Page: 4

Permit: AWS720014 Owner - Facility: Larry Stallings
Facility Number: 720014
Inspection Date: 10126/2007 Inspection Type: Compliance Inspection
Reason for Visit: Routine
Waste Application
Yes No NA NE
PAN?
❑
IS PAN > 10%/10 lbs.?
❑
Total P205?
❑
Failure to incorporate manure/sludge into bare soil?
❑
Outside of acceptable crop window?
❑
Evidence of wind drift?
n
Application outside of application area?
❑
Crop Type 1
Coastal Bermuda Grass
(Pasture)
Crop Type 2
Fescue (Pasture)
Crop Type 3
Soybeans
Crop Type 4
Small Grain Cover
Crop Type 5
Corn (Grain)
Crop Type 6
Small Grain Cover
Soil Type 1
Arapahoe fine sandy
loam
Soil Type 2
Soil Type 3
Soil Type 4
Soil Type 5
Soil Type 6
14. Do the receiving crops differ from those designated in the Certified Animal Waste Management
n
■
n
n
Plan(CAWMP)?
15. Does the receiving crop and/or land application site need improvement?
❑
■
❑
!�
16. Did the facility fail to secure and/or operate per the irrigation design or wettable acre determination?
❑
■
❑
❑
17. Does the facility lack adequate acreage for land application?
❑
■
Cl
❑
18. Is there a lack of properly operating waste application equipment?.
0
■
❑
❑
Records and Documents
Yes
No
NA
NE
19. Did the facility fail to have Certificate of Coverage and Permit readily available?
❑
■
❑
n
20. Does the facility fail to have all components of the CAWMP readily available?
❑
■
Cl
❑
If yes, check the appropriate box below.
Page: 5

c
Permit: AWS720014 Owner- Facility: Larry Stallings
Facility Number: 720014
Inspection Date: 10/26/2007 Inspection Type: Compliance Inspection
Reason for Visit: Routine
Records and Documents
Yes No
NA
NE
WUP?
❑
Checklists?
❑
Design?
❑
Maps?
❑
Other?
❑
21. Does record keeping need improvement?
n ■
n
n
If yes, check the appropriate box below.
Waste Application?
Q
120 Minute inspections?
❑
Weather code?
n
Weekly Freeboard?
❑
Transfers?
❑
Rainfall?
❑
Inspections after > 1 inch rainfall & monthly?
❑
Waste Analysis?
❑
Annual soil analysis?
❑
Crop yields?
n
Stocking?
n
Annual Certification Form (NPDES only)?
n
22. Did the facility fail to install and maintain a rain gauge?
❑ ■
❑
n
23. if selected, did the facility fail to install and maintain a rainbreaker on irrigation equipment (NPDES
only)? n n
Ie
n
24. Did the facility fail to calibrate waste application equipment as required by the permit?
■ ❑
❑
❑
25. Did the facility fail to conduct a sludge survey as required by the permit?
n ■
❑
❑
26. Did the facility fail to have an actively certified operator in charge?
n ■
n
n
27. Did the facility fail to secure a phosphorous loss assessment (PLAT) certification?
n n
■
n
Other Issues
Yes No
NA
NE
28. Were any additional problems noted which cause non-compliance of the Permit or CAWMP?
Cl ■
❑
❑
29. Did the facility fail to properly dispose of dead animals within 24 hours and/or document and report those ❑ ■
n
❑
mortality rates that exceed normal rates?
Page: 6

Permit: AWS720014 Owner- Facility: Larry Stallings
Facility Number,
720014
Inspection Date: 10/26/2007 Inspection Type: Compliance Inspection
Reason for Visit: Routine
Other issues
Yes
No
NA NE
30. At the time of the inspection did the facility pose an air quality concern? If yes, contact a regional Air ❑
❑
❑ ■
Quality representative immediately.
31. Did the facility fail to notify regional DWQ of emergency situations as required by Permit?
❑
■
❑ ❑
32. Did Reviewer/Inspector fail to discuss reviewlinspection with on -site representative?
❑
■
❑ ❑
33. Does facility require a follow-up visit by same agency?
❑
■
❑ ❑
9
Page: 7 .

FORM IRR-2
Hydrant
Field Size (wetted acres) = (
Farm Owni
Owner's Addre:
Owners Phone
Lagoon Liquid Irrigation Fields Record
One Form for Each Field per Crop Cycle
Crap Type
(1) (2) (3) (4) (5) (6)
Facility Number L -
Irrigation Operator
Irrigation Operator's
Address
Operator's Phone #
From Waste Utilization Plan
Recommended PAN
Loading (Iblacre) = (0)
(7) (3) (0) (10) 0 1)
—Nutrient
Source
Date
(mm/ddlyr)
Irrigation
Waste Analysis
PAN'
(Ib11000 gal)
PAN Applied
(Iblacre)
8 x 9
1000
Nitrogen
Balance"
(Iblacre)
(B) - (10)
Start
Time
End
Time
Total
Minutes
(a) - (2)
# of
Sprinkler;
Operating
Flow
Rate
(gallmin)
Total Volume
(gallons)
(6) x (5) x (4)
Volume
per Acre
(gallacre)
(7) / (A)
B=
Crop Cycle Totals
Owner's Signature
Certified Operator (Pdrit)
Operator's Signature
Operator's Certification No.
" NCDA Waste Anaylsis or Equivalent. At a minimum, waste analysis is required within 60 days of land application events.
Enter the value received by subtracting column (10) from (B). Continue subtracting column (10) from column (11) following each irrigation event. 12/20/2006
—Enter nutrient source (le. Lagoon/Storage Pond ID, commerical fertilizer, dry litter, etc.)

—if
r
FORM SLUR-2
Tract #
Field Size(Wetted Acres)=(A)
Farm Owner
Owner's Address
Owner's Phone #
Slurry and Sludge Application Field Records
One Form for Each Field per Crop Cycle
Field #
Facility Number
Spreader Operator
and Address
Operators Phone It
From Animal Waste Management Plan
Crop Type Recommended PAN
Loading (Iblacre) = (B)
(1) (21 (3) f4l (5) (6) (7) (8)
""Nutrient
Source
Date
(mmlddlyr)
Number
of Loads
per Field
Volume of
each -Load"
(gallons)
Total Volume
(gallons)
(2) x (3)
Volume per Acre
(gallonslacre)
(4)1(A)
Waste Analysis
PAN"
(lb11000 gal)
PAN Applied
(Iblacre)
(6) x (5) ! 1000
Nitrogen Balance""'
(Iblacre)
(B)-(7)
B=
Crop Cycle Totals:
Owners Signature
Spreader Operator's Signature
Certified Operator (print) Operator Certification No.
Can be found in operator's manual for the spreader. Contact a local dealer if you do not have your owner's manual.
** See your waste management plan for sampling frequency. At a minimum, waste analysis is required within 60 days of land application events.
'Enter the value received by subtracting column (7) from (B). Continue subtracting column (7) from column (8) following each application event.
—Enter nutrient source (ie. Lagoon/Storage Pond ID, commerical fertilizer, dry litter, etc.)
12/20/2006

Field Calibration Procedures
for Animal Wastewater Application Equipment
IN

Field Calibration Procedures
for Animal Wastewater Application Equipment
HARD HOSE
AND CABLE
TOW TRAVELER
IRRIGATION SYSTEM
General Guidelines
Land application equipment used on animal production farms must be field
calibrated or evaluated in accordance with existing design charts and tables
according to state rules that went into effect September 1, 1996. Technical
Specialist certifying waste management plans after September 1, 1996, must
also certify that operators have been provided calibration and adjustment
guidance for all land application equipment. The rules apply to irrigation Sys-
tems as well as all other types of liquid, slurry, or solid application equipment.
Information presented in manufacturers' charts are based on average op-
erating conditions for relatively new equipment. Discharge rates and applica-
tion rates change over time as equipment ages and components wear. As a
result, equipment should be field calibrated regularly to ensure that applica-
tion rates and uniformity are consistent with values used during the system
design and given in manufacturers' specifications. Field calibration involves
collection and measurement of the material being applied at several locations
in the application area. This publication contains step-by-step guidelines for
field calibration of hard hose and cable tow traveler irrigation systems.
Operating an irrigation system differently than
assumed in the design will alter the application rate,
uniformity of coverage, and subsequently the applica-
tion uniformity. Operating with excessive pressure
results in smaller droplets, greater potential for drift,
and accelerates wear of the sprinkler nozzle. Pump
wear tends to reduce operating pressure and flow.
With continued use, nozzle wear results in an in-
crease in the nozzle opening, which will increase the
discharge rate while decreasing the wetted diameter.
Clogging of nozzles or crystallization of main lines
can result in increased pump pressure but reduced
flow at the gun. Plugged intakes will reduce operating
pressure. An operating pressure below design pressure
greatly reduces the coverage diameter and application
uniformity. Field calibration helps ensure that nutri-
ents from animal waste are applied uniformly and at
proper rates.
The calibration of a hard hose or cable tow system
involves setting out collection containers, operating
the system, measuring the amount of wastewater
collected in each container, and then computing the
average application volume and application unifor-
mity.
An in -line flow meter installed in the main
irrigation line provides a good estimate of the total
volume pumped from the lagoon during each irriga-
tion cycle. The average application depth can be
determined by dividing the pumped volume by the
application area. The average application depth is
computed from the formula:
Average application depth (inches)
0
Volume pumped (gallons)
27,154 (gal/ac-in) X Application area (acres)
The average application depth is the average
amount applied throughout the field. Unfortunately.
sprinklers do not apply the same depth of water
throughout their wetted diameter. Under normal
operating conditions, application depth decreases
towards the outer perimeter of the wetted diameter.
Big gun sprinkler systems typically have overlap
based on a design sprinkler spacing of 70 to 80
percent of the wetted sprinkler diameter to compen-

Field Calibration Procedures
for Animal Wastewater Application Equipment
sate for the declining application along the outer
perimeter. When operated at the design pressure, this
overlap results in acceptable application uniformity.
When operated improperly, well -designed sys-
tems will not provide acceptable application unifor-
mity. For example, if the pressure is too low, the
application depth will be several times higher near
the center of sprinkler and water will not be thrown
as far from the sprinkler as indicated in manufactur-
ers' charts. Even through the average application
depth may be acceptable, some areas receive exces-
sively high application while others receive no
application at all.
When applying wastewater high in nutrients, it is
important to determine the application uniformity.
Collection containers distributed throughout the
application area must be used to evaluate application
uniformity.
Many types of containers can be used to collect
flow and determine the application uniformity.
Standard rain gauges work best and are recom-
mended because they already have a graduated scale
from which to read the application depth.
Pans, plastic buckets, jars, or anything with a
uniform opening and cross section can be used
provided the container is deep enough (at least 4
inches deep) to prevent splash and excessive evapo-
ration, and the liquid collected can be easily trans-
ferred to a scaled container for measuring. All
containers should be the same size and shape to
simplify application depth computations.
All collection containers should be set up at the
same height relative to the height of the sprinkler
nozzle (discharge elevation). Normally, the top of
each container should be no more than 36 inches
above the ground. Collectors should be located so
that there is no interference from the crop. The crop
canopy should be trimmed to preclude interference
or splash into the collection container.
Calibration should be performed during periods
of low evaporation. Best times are before 10 a.m. or
after 4 p.m. on days with light wind (less than 5
miles per hour). On cool, cloudy days the calibration
can be performed anytime when wind velocity is less
than 5 mph.
The volume (depth) collected during calibration
should be read soon after the sprinkler gun cart has
moved one wetted radius past the collection gauges
to minimize evaporation from the rain gauge. Where
a procedure must be performed more than once,
containers should be read and values recorded
immediately after each setup.
Calibration Setup for Hard Hose and
Cable Tow Traveling Guns
Hard hose and cable tow traveling guns are calibrated
by placing a row (transect) of collection containers or
gauges perpendicular to the direction of travel, Figure
1. The outer gauge on each end of the row should
extend past the furthest distance the gun will throw
wastewater to ensure that the calibration is performed
on the "full" wetted diameter of the gun sprinkler.
Multiple rows increase the accuracy of the calibration.
Containers should be spaced no further apart than
1/16 of the wetted diameter of the gun sprinkler not
to exceed 25 feet. At least 16 gauges should be used in
the calibration. Sixteen gauges will be adequate
except for large guns where the wetted diameter
exceeds 400 feet.
(Maximum recommended spacing between
gauges. 25 feet X 16 = 400 feet.) Gauges should be set
at least one full wetted diameter of throw from
either end of the travel lane, as shown in Figure 1.
The system should be operated such that the
minimum travel distance of the gun.cart exceeds the
wetted diameter of throw. Application volumes
should be read as soon as the last gauges stop being
wetted.
0

HARD HOSE AND CABLE TOW TRAVELER
IRRIGATION SYSTEMS
Reel can
Left . Right
Row of 8 7 5 5 4 3 2 1 i 2 3 4 5 6 7 8
collection > O O O o 0 0 0 0 O O D 0 0 0 0 0
gauges
Gun
cart
Direction of travel
Wetted diameter At least one wetted
(320 feet) diameter end of field
Figure 1. General layout and orientation
of collection gauges for calibration of a hard hose and cable tow traveler irrigation systems.
CALIBRATION PROCEDURES;•.
1. Determine the wetted. diameter of the gun._.
2. Determine the number of collection gauges and spacing between gauges. For a wetted. diameter of 320
feet, the rain gauge spacing should not exceed 20 feet. (3 20 ff,/ 16 = 20 ft).
3. Label gauges outward From the gun cart aseither left or -right (L1, L2, L3, etc; R1, R2, R3, etc.).
4. Set out gauges along a row as labeled and shown in Figure 1, equally spaced at the distance determined
in item 2 (20 feet). The: row should be, at least one wetted diameter,from either end of.the pull. The first
gauge on each side of the travel lane should be,1/2 the gauge;spacing from the center:of the lane. For: a
gauge spacing of 20 feet, L1. and R1 'should be 10; feet from the center'of.the lane. ;
5. Operate the system for the time required for the gun to completely pass.all collection containers. Record
the "starting" time that,wastewater begins to be applied along the row.,of gauges and -the "ending" time
when wastewater no longer is being applied anywhere along the row. Alsa:record .the distance traveled in
feet for -the time of. operation.
6. Immediately record the amounts collected in each gauge. (Refer to,.Table 1 for an example.).
7, identify those gauges that fall .outsidee the effective lane spacing, Figure 2. This volume is the overlap
volume that would be collected when operating the system.on the adjacent lane..
8. Superimpose (left to right and vice versa) the gauges just outside the effective width with the -gauges just
inside the effective width. Add the volumes together.
For the layout shown in Figure 2, add the volume (depth) collected in'gauge R8 (outside the effective
lane spacing) to volume (depth) collected in gauge L5 (inside the effective lane spacing). Similarly, R7 is
added to L6; L8 is added to R5; and L7 is added to R6. This is now the application volume (depth) within
the -effective lane spacing adjusted for overlap.
9

Field Calibration Procedures
for Animal Wastewater Application Equipment
Lane 1
Reel cart
Left
8 716 5 4 3 2 1
0 0` 0 0 0 0 0 0
Direction of travel I Gun
cart
Lane 2
Left
8 7 6 5 4 3 2 1
0 0 0 0 0 0 0 0
Right
6 I7 8 Gun
1 2 3 4 5 rt
000000
a `a
I'
I
I
Effective lanes acing �I
f (224 feet
Figure 2. Accounting for overlap
when calibrating a hard hose traveler system.
Right
1 2 3 4 5 6 7 8
0 0 0 0 0 0 a 0
V I
Effective lanes acing
(224 feet
k
CAL113RATION PROCEDURES (continued)
9. Add the amounts collected in all -gauges and divide'bythe number�of gauges within the effective area.
This is the average a pplication.depth (inches) within,the effective=lane spacing.
Sun1°ofiampunts collected:in:`all.gauges
Average application depth =
Number of gauges -within: effective width
10. Calculate the deviation depth for each gauge. The -deviation depth is the,:difference between each
individual gauge value and the average value of all gauges.(#7). Record the absolute value of each
deviation depth. Absolute:value means the:sign.of the nurnber (negative sign) is dropped_and_all values
are treated as positive. The:symbol'for absolute value Is a straight-.thin.line. For example, 121
means treat the number 2 as an Value: -at: oes,riot.mean ,the'number 121. Because this
symbol can lead to misunderstandings, it is not used with numbers in the worksheets
at the end of this publication. The symbol is used in formulas in the text.
Deviation depth=.IDepth collected in gauge i,- average application depthl
"i" refers to the gauge number
11. Add amounts in #10 to get "sum of the deviations" from the average depth':andidivide by the number of .
gauges to get the average deviation.
Sum of deviations(addamounts computed. in #10)
Average deviation depth =
Number. of gauges within effective lane spacing
12. The precipitation rate (inches/hour) is computed by dividing the average application depth (inch) (mp) by
the application time (hours) (#5)
Precipitation rate =
Average application depth (inch)
-Application time (hours)
O

HARD HOSE AND CABLE TOW TRAVELER
IRRIGATION SYSTEMS
CALIBRATION PROCEDURES (continued)
13. Compute the average travel speed.
Distance traveled (feet)
Average travel speed =
Time (minutes)
14.Determine the application. uniformity. The application'uniformity is often computed,.using the
mathematical formula referred to as the Christiansen Uniformity Coefficient:''
It is computed as follows:
Average depth (#9) -Average deviation (#11)
u, = x 100
Average depth (#9)
15.1nterpret the calibration results. The higher the index value, the more uniform the application. An index of
100 would mean that the uniformity is perfect — the exact same amount was collected inevery gauge.
For travelers with proper overlap and operated in light wind, an application uniformity greater than 85 is
common.
Application uniformity between 70 to.85 is in the "good" range and is acceptable for wastewater
application.
Generally, an application uniformity below 70 is considered unacceptable for wastewater irrigation using
travelers. If the computed Uc is less than 70, system adjustments are required. Contact your irrigation
dealer or Certified Technical Specialist for assistance.
Table 1. Example calibration data for a traveling gun system operated in parallel lanes. Lane
spacing 70 percent of sprinkler wetted diameter.
a. Manufacturers' Specifications: Gun Model 150 Type Taper Bore
Nozzle Dia, - in h Pressure (Gun) 70 psi Reel 105 12si
Wetted diameter 320 ft. Effective Spacing 224 ft Flow 197 GPM
Hose Size: Length 800 ft Diameter 3 in
b. Spacing between collection containers (spacing 320 (ft) / 16) =_Mft
c, Number of gauges = 16
d. Start of Irrigation event 7:15 a.m.
e. End of Irrigation event 9:00 a.m.
f, Duration (e-d) 1Q5_minutes
9. Travel distance_ 32111eet
h. Operate the system and collect data.
0

Field Calibration Procedures
for Animal Wastewater Application Equipment
' Table 1 Calibration
{.:
Data
"
Gauge
Distance;Volume
Overlap Corrected } Qeviationb,
No
fTdm Center f
Collected AdjustmentVolurne from Average's s
(inches); f 1{inches}
L1
10
94< a '� v i 94
L2
30
80
i r1 Y 80 095 (2 )
:.
�4rA
` 115
L3
5o
59' I ?
t ;: S9 (.etc)
r
L4.
70 .
61.
6i ,095
L5
90
50
:.134 63...
r.
L6
170
42 I
20 62, 085
L7
130
33
L8
150 _
07
Ri
10 f'
73.
4 73f , .025, }.
R2
30.
.81:
z
r 81 ' .105 t -
R3
50
92
92 .215
R4
70
64 _
64 --.065 =
R5
90
50 .:
:` .07 : ; 57 .135'
R6
110
27• -
.33 .60,_ - , .105 ..
..R7
130
20
:�R8
150
-.13
Absolute value; treat all values
as positive.
L Sum of, all volumes collected in #h 8.46 inches
j. Average, catch (i/number of gauges within effective width (12) Q.705 inches
Distance traveled (ft) ' 320 €t
k. Compute the average travel speed = : ' ' _ — = 3.04 ft/min
Time (min) 105 min
average depth (inches) :: 0:705` n
I. Precipitation rate= = 0 40 in
a pplicatiori.time (hour) 1::75 hr
m. Sum of deviations from the average _catch - 1,356 r
n. Average deviation from average catch (m/12) 0.113
o. Uniformity coefficient
0.705 - 0.113
U= X100=84
0.705
p. Interpret results. Uniformity. coefficient of 84 is in the good range for a -traveler system. No adjustment
is necessary.
e
LJ

Q
HARD HOSE AND CABLE TOW TRAVELER
IRRIGATION SYSTEMS
Irrigation System Calibration Data Sheet for Hard Hose Traveler Irrigation System
DATE: Land Owner Farm No.
a. Manufacturers' Specifications: Gun Model Type
Nozzle Dia. In Pressure (Gun) (Reel)
Wetted diameter It Effective Spacing ft Flow GPM
Hose Size: Length ft Diameter in
b. Spacing between collection containers (diameter ft) / 16) = ft
C. wetted diameter (ft)
Number of gauges = -
gauge spacing (ft)
d. Start of Irrigation event
e. End of Irrigation event
f. Duration (e-d) min
an.mmd uavw
g. Travel distance feet
h. Operate the system, collect data,
and record on the worksheet on page 8.
L Sum of all catches inches
j. Average catch (i/number of gauges) inches
Distance traveled (ft)
k. Average travel speed =
Time (min)
I. Sum of all deviations from the average catch
m. Average deviation from average catch
n. Uniformity coefficient
U) (m)
Ut =-------- X 100 =
," I lane 2
WL
8 7 6 5 4 3 2 7 7 2 3 4 5 6 7 6
a a o a a a 0 C o a o a a olo a
Ldl R7ghl
I C_ 1 \ I
• LRan�
I
'ff"
Interpret the calibration data and make necessary adjustments.
For travelers with proper overlap and operated in light wind, an application uniformity Coefficient greater
than 85 is common.
Application uniformity between 70 to 85 is in the "good" range and is acceptable for wastewater application.
Generally, an application uniformity below 70 is considered unacceptable for wastewater irrigation using
travelers. If the computed U, is less than 70, system adjustments are required. Contact your irrigation dealer
or Certified Technical Specialist for assistance.
O

Field Calibration Procedures
for Animal Wastewater Application Equipment
Calibration Data (continued)
Gauge Distance Volume Overlap Corrected Deviation
No. from Center Collected Adjustment Volume from Average`
(feet) (inches) (inches) (inches) (inches)
L1
L2
L3
L4
L5
L6
L7
L8
L9
L10
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
'Absolute value;
treat all values as positive. Reel tart
Left Right
Row of 8 7 6 5 4 3 2 t 7 2 3 a 5 6 7 E
co6ection 00000 000 0 0 0 Q 0 Q a 0
gauges
Gun
tart
Direction of travel
Wetted diameter At ieW one welted
(320 feet) "`— d'wneter end of field
i�

Field Calibration Procedures
for Animal Wastewater Application Equipment
Prepared by
R.O. Evans, Biological and Agricultural Engineering Extension Specialist
l.C. Barker, Biological and Agricultural Engineering Extension Specialist
J. T. Smith, Biological and Agricultural Engineering Assistant Extension Specialist
R.E. Sheffield, Biological and Agricultural Engineering Extension Specialist
5,000 copies of this public document were printed at a cost of $1,962, or $.39 per copy.
Published by
NORTH CAROLINA COOPERATIVE EXTENSION SERVICE
Distributed in furtherance of the Acts of Congress of May B and June 30, 1914. Employment and program opportunities are offered to all people
regardless of race, color, national origin, sex, age, or disability. North Carolina State University, North Carolina A&T State University, U.S. Depart-
ment of Agriculture, and local governments cooperating.
4/97-5M—JMG/KEL AG-553-2
E97-30399

- 'MARE ETHPD_,,

Field Calibration Procedures for Solid and
Semi -Solid Animal Waste Application Equipment
WEIGHT -AREA
METHOD
SPREADER SYSTEM
Load -Area Method
Information presented in manufacturer's charts are based on average operat-
ing conditions for relatively new equipment. Discharge rates and application
rates change over time as equipment gets older and components wear. For
solid or semi -solid application equipment, application rates and patterns may
vary depending on forward travel and/or PTO speed, gear box settings, gate
openings, operating pressures, spread widths, and overlaps.
Equipment should be calibrated on a regular basis to ensure proper appli-
cation rates and uniformity. Calibration is a simple procedure involving col-
lecting and measuring the material being applied at several locations in the
application area. Calibration helps ensure that nutrients from animal waste
are applied efficiently and at proper rates.
Solid or semi -solid (slurry) applicators can be calibrated by one of two
methods: load -area method, and weight -area method.
To use the load -area method, you must know the
spreader capacity. Spreader capacity is normally rated
by the manufacturer and often is indicated on the
application equipment. Liquid spreaders are normally
rated in gallons while semi -solid spreaders are rated in
either bushels or cubic feet.
As the name implies, the load -area method
involves applying a full load to a measured area. For
ease of measurement, it is best to use a rectangular
field pattern. For PTO -driven spreaders, application
rate is dependent on ground speed so a uniform _
speed must be maintained throughout the swath
length. Ground -driven applicators apply reasonably
uniform rates independent of ground speed. Refer to
fact sheet AG-553-5 for detailed calibration proce-
dures,
Weight -Area Method
The weight -area method is often used for solid and
semi -solid spreaders. The procedure involves measur-
ing the spreader discharge over a small measured area.
The application rate is determined by dividing the
collected material (weight) by the collection area.
Weight -Area Method Calibration
Procedure
1. Obtain a tarp or plastic sheet of about 100 square
feet (9'x12'. 10'X10', 10'X12% etc.) and measure for
exact surface area (length X width).
2. Weigh the tarp using a set of spring -tension or
platform scales.
3. Spread the tarp and pin on the field surface at
each corner with a tent stake or long nail through
the eyelets.
4. Operate the spreader over the center of the tarp at
the speed normally driven when applying manure on
the field.
5. Make two additional passes on two opposite sides
of the center of the tarp at the normal spreader
overlap spacing.
6. Remove and fold the tarp being careful not to spill
any collected material. Weigh the tarp and manure

�,
L �
Effective swath
width with
proper overlap
Figure 1 (above). Proper spreader patterns
necessary to achieve application uniformity.
(gross weight).
7. Subtract the empty tarp weight from the gross
tarp plus manure weight to obtain the weight of
manure applied.
P7ramid
R 4
Effective swath
width with
proper overlap.
8. Divide the amount of manure collected (pounds)
by the tarp area (square feet) and multiply this value
by 21.8 (43,560 ft2/ac divided by 2,000 lbs/ton) to
convert pounds per square foot to tons per acre.
9. If the application rate needs to be adjusted, make
the necessary changes (spreader settings, speed, or
both) and repeat the procedure until the desired
application rate is obtained.
Spreader Pattern Uniformity
Determination of spreader uniformity is an impor-
tant component of spreader calibration. The pattern
shape and uniformity determines the overlap re-
quired for uniform application. One of the pattern
shapes shown in Figure 1 is required for a uniform
SOLIDS
SPREADER
application.
WEIGHT -AREA METHOD
SPREADER SYSTEM
Oval
bkm -• E�
Wt to
be Ili 143JI It3411 it
y� cPoe DOC9 7oa:*e;p '
Effective swath
width with
proper overlap
To determine the uniformity of spread and the
amount of overlap needed:
1. Place a line of small pans or trays equally spaced
(2 to 4 feet apart) across the spreader path (See Figure
2). Label the pans chronologically as left or right from
the center pan. Center pans may need to be shifted
slightly out of the spreader wheel tracks. (Pans should
be a minimum of 12 by 12 inches, no more than 24
by 24 inches, and 2 to 4 inches deep.)
2. Make one spreader pass directly over the center
pan at normal operating speed and spreader settings.
Record
— spinner PTO speed,
— flow divider delivery point onto the spinners,
and
the spreader gate setting.
3. Weigh and record the contents caught in each pan.
4. The effective spread width is found by locating
the pan on either side of the path center where the
contents caught in the container is one-half the
amount caught in the center pan.
5. The distance between the two pans on either side
of the center (€n Number 4) is the effective width.
The outer fringes of the coverage area beyond these
points should be overlapped on each subsequent
pathFigure 2 (left). Position of catch pans to
determine spreader pattern, swath width,
and overlap of the spreader.
L5 FL L4 L3 ' FL-21 FR7C R1 R2 R3 R4 R5 Rfi
Left Center Right
Relative Amount Caught
0 Y2 1 Y2 0
i4 Effective Swath Width-- 01

CALIBRATING SOLID AND SEMI -SOLID MANURE SPREADERS USING THE WEIGHT -AREA METHOD
1. Spread a tarp or plastic sheet over the ground surface and secure with pins or small weights. The tarp
should have at Ieast:100 square feet (9'X12', 10'X10', etc.) of surface area.
a. width X length = area ft2
2. Start applying manure downrange of the tarp and spread directly across the center of it in a manner similar
to the regular spreading patterns and settings of the applicator (speed, spreader settings, overlap),
Trial Trial Trial
b. Forward speed, gear, or
throttle setting
c. PTO speed or setting
d. Spreader gate setting
3. Transfer the manure collected on the tarp into a weighing container and weigh using an accurate set of
spin- tension or platform scales.
e. Empty weight of weighing container lbs
f. Gross weight of container t manure Ibs
g. Net weight of rrianure (f — e) Ibs
4. Compute the manure application rate:
h. Area or tarp (a) ft2
i. Application rate (g _ h) tbs/ft2
j. Application rate (i X 43560 _ 2000) tons/acre
5. Compute the nutrient application rate:
k. Manure analysis N Ibs/ton
PZO5 Ibs/ton
K20 Ibs/ton
I. Application rate N Ibs/acre
(j X k) P205 lbs/acre
K20 Ibs/acre
6. If the application rate is not acceptable, repeat the procedure at different spreader settings, speeds,
or both (Item 2) until the desired application rate is achieved.
Prepared by
LC. Barker, Biological and Agricultural Engineering Extension Specialist
R. D. Evans, Biological and Agricultural Engineering Extension Specialist
D.A. Crouse, Soil Science Extension Specialist
Z500 copies of this public document were printed at a cost of $607, or 5.24 per copy.
Published by
NORTH CAROLINA COOPERATIVE EXTENSION SERVICE
Distributed in furtherance of the Acts of Congress of_May 8 and June 30, 1914. Employment and program opportunities are offered to all people
regardless of race, color, national origin, sex, age, or disability. North Carolina State University, North Carolina A&T State University, U.S. Department of
Agriculture, and local governments cooperating.
7/97-2.5M—JMG/KEL AG-553-4
E97.31965

-Rel d,CalibCatbop Prbc.ed.ures
q
-r Mimal' -stewa Ap 46 -Wa Wt., plicatidnl (flomiaht-
STATIONARV,--L�
all
N-SYST-EW-"' -IIRRIGATIO
91
North -- C6r6lih 6.Cooperative

Field Calibration Procedures
for Animal Wastewater Application Equipment
STATIONARY
SPRINKLER
IRRIGATION SYSTEM
General Guidelines
Land application equipment used on animal production farms must be meld
calibrated or evaluated in accordance with existing design charts and tables
according to state rules that went into effect September 1, 1996. Technical
Specialist certifying waste management plans after September 1, 1996, must
also certify that operators have been provided calibration and adjustment
guidance for all land application equipment. The rules apply to irrigation sys-
tems as well as all other types of liquid, slurry, or solid application equipment.
Information presented in manufacturers' charts are based on average
operating conditions for relatively new equipment. Discharge rates and appli-
cation rates change over time as equipment ages and components wear. As a
result, equipment should be field calibrated regularly to ensure that applica-
tion rates and uniformity are consistent with values used during the system
design and given in manufacturers' specifications. Field calibration is a simple
procedure involving collection. and measurement of the material being
applied at several locations in the application area. This publication con-
tains step-by-step guidelines for field calibration of stationary sprinkler
irrigation systems.
Operating an irrigation system differently than
assumed in the design will alter the application rate,
uniformity of coverage, and subsequently the
application uniformity. Operating with excessive
pressure results in smaller droplets, greater potential
for drift, and accelerates wear of the sprinkler nozzle.
Pump wear tends to reduce operating pressure and
Flow. With continued use, nozzle wear results in an
increase in the nozzle opening, which will increase
the discharge rate while decreasing the wetted
diameter. Clogging of nozzles or crystallization of
main lines can result in increased pump pressure but
reduced flow at the sprinkler. Plugged intakes will
reduce operating pressure. An operating pressure
below design pressure greatly reduces the coverage
diameter and application uniformity. Field calibra-
tion helps ensure that nutrients from animal waste
are applied uniformly and at proper rates.
The calibration of a stationary sprinkler irrigation
system involves setting out collection containers,
operating the system, measuring the amount of
wastewater collected in each container, and then
computing the average depth of application (applica-
tion volume) and application uniformity.
An in -line flow meter installed in the main
irrigation line provides a good estimate of the total
volume pumped from the lagoon during each irriga-
tion cycle. The average application depth can be
determined by dividing the pumped volume by the
application area. The average application depth is
computed from the formula:
Average application depth (inches) =
Volume pumped (gallons)
27,154 (gal/ac-in) X Application area (acres)
The average application depth is the average
amount applied throughout the field. Unfortunately,
sprinklers do not apply the same depth of water
throughout their wetted area.Under normal operat-
ing conditions, application depth decreases towards
the outer perimeter of the wetted diameter. Station-
ary sprinkler systems are designed to have overlap of
50 to 65 percent of the wetted sprinkler diameter to
compensate for the declining application along the
0

Field Calibration Procedures
for. Animal Wastewaier Application Equipment
outer perimeter. When operated at the design
pressure, this overlap results in acceptable applica-
tion uniformity.
When operated improperly, well -designed systems
will not provide acceptable application uniformity.
For example, if the pressure is too low, the applica-
tion depth will be several times higher near the
center of sprinkler and water will not be thrown as far
from the sprinkler as indicated in manufacturers'
charts. Even through the average application depth
may be acceptable, some areas receive excessively
high application while others receive no application
-at all.
When applying wastewater high in nutrients, it is
important to determine the application uniformity.
Collection containers distributed throughout the
application area must be used to evaluate application
uniformity. Many types of containers can be used to
collect flow and determine the application unifor-
mity. Standard rain gauges work best and are recom-
mended because they already have a graduated scale
from which to read the application depth.`
Pans, plastic buckets, jars, or anything with a
uniform opening and cross section can be used,
provided the container is deep enough (at least 4
inches deep) to prevent splash and excessive evapo-
ration, and the liquid collected can be easily trans-
ferred to a scaled container for measuring. All
containers should be the same size and shape.
All collection containers should be set up at the
same height relative to the height of the sprinkler
nozzle (discharge elevation). NormalIy, the top of
each container should be no more than 36 inches
above the ground. Collectors should be located so
that there is no interference from the crop. The crop
canopy should be trimmed to preclude interference
or splash into the collection container.
Calibration should be performed during periods
of low evaporation. Best times are before 10 a.m, or
after 4 p.m. on days with light wind (less than 5
miles per hour. On cool, cloudy days the calibration
can be performed any time when wind velocity is
less than 5 miles per hour.
General Guidelines for Stationary
Sprinklers
Rain gauges or other collection containers should be
spaced in a grid pattern fully enclosing the "effective"
wetted area defined by the sprinkler spacing. The
most common spacing pattern for stationary sprin-
klers is a square spacing where the distance between
sprinklers is the same as the spacing between laterals.
The spacing between sprinklers and laterals is
nor-mally between 50 to 65 percent of the sprinkler
wetted diameter specified by the manufacturer.
Collection gauges should be placed one-fourth
the lateral line length from the main and no further
apart than one-fourth the wetted sprinkler radius or
effective sprinkler spacing. (For example, if the
effective spacing is 80 feet, spacing between gauges
should be no more than 20 feet).
The grid pattern and number of gauges required
to complete the calibration depends on the pattern
of operating the irrigation system. The size of the
calibration area should be no less than the 'effec-
tive" area of one sprinkler. When sprinklers are
arranged in a rectangular or square pattern with
proper overlap, an "effective area" receives flow from
four sprinklers. Thus, a minimum of four sprinklers
should be included in the calibration.
The reliability of the calibration generally im-
proves as more sprinklers are included in the calibra-
tion area. if all sprinklers contributing flow to the
calibration area are functioning correctly, it is neces-
sary to include only the minimum number of
c sprinklers as described in the preceding paragraph.
But, a malfunctioning sprinkler can greatly influence
the calibration results. Its effect on the calibration
depends on the calibration setup and number of
sprinklers being calibrated, the malfunctioning
sprinkler's position within the calibration area, the
direction of the prevailing wind, and the nature of
the malfunction. For these reasons, it is extremely
important to observe the performance of every
sprinkler contributing to the calibration while t1he
calibration is being performed and to record any
obvious performance irregularities. The more sprin-
klers that can be included in the calibration, the
more representative the calibration results will be of
the entire field and the less influence one malfunc-
tioning sprinkler will have on the calibration results.
The volume (depth) collected during calibration
should be read as soon as a zone or sprinkler is shut
off to minimize evaporation from the rain gauge.
Where a procedure must be performed more than
once, (Setups 3, 4, or 5 described below) containers
should be read and'values recorded immediately after
each different set up.
Operating patterns affect collection container
0

layout and calibration
procedures and results.
Typical patterns for station- (Li S11
ary sprinklers include:
1. Square sprinkler spac-
ing operated as a block
(two or more adjacent
Iaterals operating at the L2
same time) Figure 1 or —`- S21
Figure 2. 16
The calibration area may
be positioned or centered
between the two laterals L3
as shown in either Figure i S31
or Figure 2. Four sprinklers
contribute flow to the k— Calibration area to
lateral length fro
calibration area in the setup
shown in Figure 1, while six Minimum
sprinklers contribute for the
setup shown in Figure 2. If
all sprinklers are function- .
ing properly, similar results
would be obtained with
either setup.
In case 1, with no wind
effects, all four sprinklers
should contribute equal Ll 511
flow to the calibration area
(provided all sprinklers are
functioning properly). If
one of the four sprinklers is
functioning improperly, the L2
calibration results are not
biased by its position within .g S21
the calibration area.
In case 2. six sprinklers
contribute flow to the L3
calibration area, but their
contribution is not equal. S31
Sprinklers S13 and S23 a Calibration ar
contribute much more flow lateral lengt
to the calibration area than
sprinklers S12 St, S22 or SV.
(The first number refers to
the lateral number and the
second number refers to the sprinkler number along
the lateral.) The setup shown in Figure 2 provides the
advantage of more sprinklers contributing to the
calibration, but the disadvantage of the results
STATIONARY SPRINKLER
IRRIGATION SYSTEM
16
Catch cans
3 1 1 S14 1 I S15
522 S23 S24 S25
Lateral
Catch can spacing Calibration area
S32 S33 S34 S35
cated A/ Sprinkler
m main —'� Lateral line F spacing
calibration area = Sprinkler spacing x Lateral spacing
Figure 1. Layout of collection containers for calibration of a stationary sprinkler
system operated in a block design. In setup shown, four sprinklers contribute to
the calibration.
is
Catch can
S12 513 S14 n S15
0 0 ,; o; o
S22 I S23 S24 S25
Lateral
spacing
Catch can spacing Calibration area
532 S33
ea located Yc � 01
h from main Lateral line
S34 S35
r Sprinkler -�
spacing
Figure 2. Collection container layout for calibration of a stationary sprinkler system
operated in a block design. In setup shown, six sprinklers contribute to the
calibration.
potentially being biased by sprinklers SY3 and S13 If
they are malfunctioning.
For a square sprinkler spacing with collection
gauges set at one-fourth the distance of the sprinkler
9

Field Calibration Procedures
for Animal Wastewater Application Equipment
spacing, the minimum
number of collection S 1 Lateral A
gauges required to perform
the calibration is 16. Step-
by-step procedures for this
pattern are presented in the
Case I example on page 6.
S21 Lateral B
2. One lateral operating
at a time with standard
overlap from adjacent
laterals — collection
containers must be placed S31
on each side of the lateral,
Figure 3, which requires
twice as many collectors
(minimum 32).
A second alternative is
to perform the procedure
twice, once on each side of
the lateral using 16 contain-
ers at a time, Figure 4. When
selecting this alternative,
pay attention to changes in
operating conditions, such
as change in wind speed or
direction, that could result S11 Lateral A
in variability.
In either alternative,
the amounts collected must
be combined to account for
overlap. Step-by-step
procedures for this calibra- Lateral B
tion pattern are presented S21
in the Case II example on
page 8.
3. One lateral operating S31 Lateral C
with no overlap between
laterals — typical case ik Calibration area to
when large gun -type lateral length fro
sprinklers are operated in
narrow fields, Figure S.
Calibration procedure is
similar to procedure in #2
except outer edges do not
receive overlap and must be
excluded from the effective area calculations. Collec-
tion gauges may be centered about one sprinkler or
positioned between two adjacent sprinklers.
One of two approaches can be used to perform
S32
Calibration area located A
lateral length from main .
32 Catch cans
S
1015
4;As` 80S33012'::AZ:1B
Lateral line
S15
S34 S;
Id Sprinkler �
spacing
I
Lateral
spacing
Figure 3. Collection container layout for calibration of a stationary sprinkler system
with one lateral operating at a time. For setup shown, both sides of lateral are
calibrated in one operation.
S12
S13
S14
S15
013014
L3O
k6_1
O
40 80.:012,.Q16
,1
S22 / S23 S24 S25 1
Lateral
16 Catch cans spacing
S32 S33 S34 S35
Gated Y. �� �� Sprinkler --a1
m main spacing
Lateral line
Figure 4. Collection container layout for calibration of a stationary sprinkler system
with one lateral operated at a time. For the setup shown, the procedure must be
performed twice, once for lateral A, once for lateral B.
this calibration. A general rule in irrigation design is
to assume that the width of the effective area is
between 50 to 65 percent of the wetted diameter of
the sprinkler (often 60 percent is used). The first
LO

ED
S
C
STATIONARY SPRINKLER
IRRIGATION SYSTEM
Field ditch
edges are ignored at the
onset of the calibration.
j'
Flow from all sprinklers is
1`q 2Q:3'= 4
j
summed then averaged to
_,
Lateral A 50; O 70 O_,B
11
Effective width
compute the average
60% of
application depth for the
_ 10 `.O'12
wetted
effective area.
140 150J.` . -
Ildiameter
{
For the second alterna-
tive, the entire width of
the field is included in the
calibration as shown in
L41 O L42 0 L430 0,L44
Field ditch
Figure 5 (Lateral B). At
2 O'L33 0 .:
least 16 gauges should be
set out on each side of the
1 0 .z 0 ua O 0L2
lateral. The calibration can
Lateral l3 111"00, 003 0 '..0114
Field width
be performed all at once
R11 O Rl O R130:'. '� Q R14
(both sides of the lateral
which requires 32 gauges)
R 0 22 0 R230 4
or the procedure can be
R310 R3 O R34
performed twice, once on
R41 O R4 O R4 O 0 544
each side of the lateral
using 16 gauges at a time.
The "non -zero" volumes
Figure 5. Collection container layout to calibrate a single lateral line with no overlap
collected are averaged to
from adjacent lateral. Either setup shown (lateral A or
lateral B) may be used.
get a "preliminary" average
application depth for the
wetted area. Next, the
average application depth
16 Catch
cans
Field ditch
for each row of gauges is
1 p p 3 p a
computed (rows are
Gun 1 Gun 2 O O 6 7 Q S Gun 3
Gun 4 Effectve width
assumed to be oriented
60%of
parallel to the lateral). In
90. .010 110 12
wetted diameter
this computation, zero
13p 0 15p Jr
values are included. Those
rows whose row average is
less than one-half the
average from the entire
I
wetted area are then
E Y4 Lateral length �� Gun
from main spacing
,I
excluded and assumed to
fall outside the effective
area. The effective width is
Figure 6. Collection container layout to calibrate a stationary gun system when each
the distance from the
gun is operated separately (not head to head).
lateral line to the furthest
calibration approach accepts this design guideline
that the effective width of the lateral is 60 percent of
the wetted diameter of one sprinkler. Sixteen gauges
are set out as shown in Figure 5 (Lateral A) (8 gauges
on each side of the lateral) with all 16 gauges posi-
tioned within the effective sprinkler width. The outer
row from the lateral that is
retained Ste b ste rocedures for this method are
• 1?- Y- P P
given in the Case III example on page 9.
4. Big gun sprinkler operating individually, Figure 6.
Procedure must be repeated for each gun sprinkler or
sprinkler position (hydrant) contributing to the
effective area being calibrated. This operating situa-

Field Cali blrazion Procaduret
far Animal Wastewater Af alicaticnqulprnent
tion results where one or two guns or big sprinklers
are moved from hydrant to hydrant throughout the
field. Since stationary big guns should not be oper-
ated "head to head." (two or more sprinklers throw-
ing water on the same area simultaneously); the
procedure must be repeated several times.
Collection gauges may be centered about one gun
sprinkler. This setup requires that the procedure be
performed three times, once while Gun 2 operates,
again when Gun 3 operates, and a third time when
Gun 4 operates. Collection gauges may also be
centered between Gun 2 and 3 or Guns 3 and 4 as
shown in Figure 6. (Actual Iocation depends on the
length of the lateral) . In this setup, the procedure
CASE I. Block Pattern with 2 or more laterals: operating simultaneously
(Scenarios shown in Figures 1 and 2)
1. Determine the effective sprinkler area. (Area defined ,by sprint lerJspacing; along a lateral multiplied by the
spacing between laterals. (Example. 80 feet by.80=feet'are:typidal-for a solid set wastewater system). The
effective sprinkler area is the minimum area;.to.be:included in the calibration area. Note: The calibration
area can be more than the effective area of bne sprinkler,..
2. Determine the necessary spacing between collection gadges.(1/4.the sprinkler spacing). For an effective
sprinkler spacing of So feet, the rain gauge spacing should; not exceed 20 feet. (80 ft / 4 = 20 ft). Gauges
closest to the sprinklers should be placeda distance of 1 /2 the gauge spacing from the sprinkler. For a
gauge spacing of 20 feet, the First row of'gauges .should be 10 feet from the lateral line or sprinklers.
3. Determine the number of gauges required. (Minimum number is 16'.)
Calibration area (€t2)
Number of gauges =
Gauge area (ftz)'
Example: Calibration area = 80 ft x 80 ft=.6400 ft2
Gauge area = 20 ft x 20 ft = 400-ft2
6400 ft'
Number of gauges = - = 16 gauges
400 ft2
4. Set out gauges in a rectangular pattern as shown in Figure.1 or 2r equally spaced at the distance
determined in item 2 (20 feet) within the calibration area.
5. Operate the system for normal operating time for a full.cycle. Record the time of operation (duration in
hours) .
6. immediately record the amounts collected in each gauge. (Refer.to Worksheet No. 1 for an example.)
7. Add the amounts in #6 and divide by the number of gauges. This is the average application depth
(inches).
Sum of amounts collected in all gauges
Average application depth =
Number of gauges

CASE L (continued)
Calculate the deviation depth for each -,gauge.- The deviation..d,eptl
individual gauge value and the average. valueAV
of a1I`gauges.(i3
deviation depth (absolute value meansthe. sign of the number (ni
are treated as positive). The symbol for. absolute value;is:'a straight
the number 2 as an absolute value. It daes.not meanihe.number:
misunderstandings,. it is not used with numbers in thee w.orksFieets
STATIONARY SPRINKLER
IRRIGATION SYSTEM
N.the difference between each .
:Record -the absolute 4ue-of each
labile sign) is dropped and all values
h `,<Iine.;.For example, 121 means -treat
21 'Because this symbol can le.ad'to
t,tHe end of this publication. The
symbol is used in formulas in the text::
Deviation depth IDepth collected in gauge,i - average application depth]
"I" refers to the gauge number
9. Add amounts in #8 to get "sum of the deviations" from: ihi average, depth and divide by the number of
gauges to get the average deviation.
Surri of deviations (add amounts computed in #8)
Average deviation depth =
Numder,of gauges
10.The precipitation rate (inches/hour) is computed by dividing the.average application depth (inch) by the
application time (hours)
Average application depth (inch)
Precipitation rate =
Application time (hours)
11. Determine the application_ uniformity. The application. uniformity. is often computed using the
mathematical formula referred to as the Christiansen Uniformity Coefficient. It is computed as follows:
u - Average depth (0) - average deviation (#9) X 100
` Average depth (#7)
12. Interpret the calibration results. The higher the index value, the more uniform the application. An index
of 100 would mean that the uniformity is perfect — that the exact same amount was collected in every
gauge.
An application uniformity greater than 75 is excellent for stationary sprinklers.
Application uniformity between 50 to 75 is in the "good" range and is acceptable for wastewater
application.
Generally, an application uniformity below 50 is not acceptable for wastewater irrigation with stationary
sprinklers. If the computed U, is less than 50, system adjustments are required. Contact your irrigation
dealer or Certified Technical Specialist for assistance.
9

Field Calibration Procedures
for Animal Wastewater Application Equipment
CASE ll. Single lateral operated at one time but receives bverlap'from adjacent laterals.
(Scenarios shown in.Figures-3 and 4) -
1.. Determine the effective sprinkler area. (Lateral spacing times sprinkler. spacing along:lateral).
2. Determine the necessary spacing between -collection gauges: (Lateral spacing divided by 4), Gauges
closest to the sprinklers should be placed a•distance of -one-half the gauge spacing from the sprinkler.
3. Determine the number of gauges required.
❑ Minimum number is 32 to perform the -procedure in one setup, Figure 3; or
❑ One side of lateral calibrated at a time requires 16 gauges,: procedure performed twice, first
operating Lateral A (Figure 4) then repeated without moving gauges and operating Lateral
B.
4. The amount collected on one side of the lateral must be added to the amount collected from respective
positions on the other side of the lateral. This is necessary to account for overlap from adjacent laterals,
Therefore, collection gauges should be labeled to indicate their respective positions, such as left or right
of the lateral.
5. Set out gauges in a rectangular pattern as shown in Figures 3 or 4, equally spaced at the distance
determined in item 2.
6. - Operate the system for normal operating time for a full cycle. Record the time of operation (duration in
hours).
7. Immediately record the amounts collected in each gauge. (Refer to Work Sheet No. 2 for an example). if
only one side of the lateral is calibrated at a time, after recording collection amounts, empty and move
the collection containers to the other side and repeat steps 5 through 7 for exactly the same time
duration as recorded in item 6.
8. Collection amounts from pairs of cans should be added to simulate overlap. Contents should be
combined from one side of the lateral to the other side as shown in Figure 3. Referring to
Figure 3, container L7 is combined to R1, L2 to R2, L3 to R3, L4 to R4, L5 to-RS, and so on.
9. Add the amounts from all containers and divide by the number of gauges on one side of the lateral. This
is the average application depth (inches).
um ot amounts conectea in ail gauges
Average application depth =
Number of gauges on one side of lateral
10. Calculate the deviation depth for each gauge. The deviation depth is the difference between combined
depth for each position (values computed in #8) and the average application depth (#9). Record the
absolute value of each deviation depth. Absolute value means the sign of the number (negative sign) is
dropped and all values are treated as positive. The symbol for absolute value is a thin straight line.
Deviation depth = JDepth collected at position i - average application depth[
"i" refers to the gauge position within the effective calibration area
11. Add amounts in #10 to get "sum of the deviations" from the average depth and divide by the number of
gauges (number of gauges on one side of lateral) to get the average deviation depth.
Average deviation depth =
IO

STATIONARY SPRINKLER
IRRIGATION SYSTEM
Number of gauges on one side of lateral
CASE II. (continued)
12. Determine the application uniformity. The.application uniformity is often computed- using the
mathematical formula referred to as. the Christiansen Uniformity Coefficient, It is computed as follows:
U,= X 100
Average.depth (#9)
13. Interpret the calibration results. The higher the index value, -the more uniform the application. An index of
100 would mean that the uniformity is perfect --- the exact amount Was collected in every gauge.
An application uniformity greater than 75 is excellent for stationary sprinklers.
Application uniformity between 50 to 75 is in the "good" range and is acceptable for wastewater
application,
Generally, an application uniformity below 50 is not acceptable for wastewater irrigation. If the computed
U. is less than 50, system adjustments are required. Contact your irrigation dealer or Certified Technical
Specialist for assistance.
CASE Ill. Single Lateral or Gun Sprinkler without overlap from adjacent laterals.
(Scenarios shown in Figures 5 or 5)
1. Determine the wetted diameter of a sprinkler or field width.
2. Determine the necessary spacing between collection gauges. The spacing in the direction along the lateral
should be one-fourth the effective sprinkler spacing. The gauge spacing perpendicular to the lateral
should be 1/8 the wetted diameter or width of the field.
Effective sprinkler spacing in feet
Spacing between collection gauges parallel to lateral =
Sprinkler wetted diameter in feet
Spacing between collection gauges perpendicular to lateral =
8
3. Determine the number'of gauges required.
D Minimum number is 32 to perform the procedure in one setup (both sides of lateral at the
same time).
O One side of lateral calibrated at a time requires 16 gauges, procedure performed twice, once on
each side of the lateral.
4. Set out gauges in a rectangular grid pattern as shown in Figure 5, spaced at the distances determined in
item 2. Be sure to label gauges by rows (rows should be oriented parallel to and outward from the lateral
line), The first row of gauges should be located 1/2 the gauge spacing from the lateral.
5. Operate the system for normal operating time For a full cycle. Record the time of operation (duration in
hours).
77

Field Calibration Procedures
for Anima! Wastowater Application Equipment
CASE III. (continued)
6. Immediately record the amounts collected in eachrgauge (Refer! td Workl.Sheet No. 3 for an example). if
only one side of the lateral is calibrated at.a'dme ,after�recording collection amounts, empty and move
the collection containers to the other side; and.repeat steps 4-thro.66h 6` for.exactly the same time
duration as recorded in item 5.:.:
7. Add the "non -zero" amounts collected and divide' by. th'e number;of,gauges with'a non -zero amount. This
is the "preliminary" average application depth. (inches) within the :' wetted" calibration area.
Sum'of nonzero amounts collected
Average application depth = ;
Number of non zero,gauges
8. Determine the average application depth -by rovvs.:.Enclude zero.:catches in the row computations.
Sum;of collection amounts from all gauges on the row
Average row application depth -
of row gauges
9. ' Identify and delete those rows whose average application depth (#8) is less than one-half the preliminary;
average application depth (#7).
10. Determine the effective application width. The boundary is defined as.the distance from the lateral to the
last row furthest from the lateral that is retained.
11. Determine the average application depth within thel effective: area: Add amounts from all gauges in rows
within the effective width (Rows retained.in #9 and-#10)::'
Sum-of,amounts collected in rows within effective width
Corrected average application depth = — -- -- --
- Number'of gauges within the effective width
12. Calculate the deviation depth for each gauge. The deviation depth is the difference collected in each
usable gauge and the average application depth (#11). Record the absolute value of each deviation
depth, Absolute value means the sign of the number {negative sign) is dropped and all values are
treated as positive. The symbol for absolute value is'aIthimstraight line.
Deviation depth = 1Depth collected at position i=average application depth (#11)1
"i" refers to the gauge position within the effective calibration area
13.Add amounts in #12 to get "sum of the deviations" from the average depth and divide by the number
of gauges.
Average deviation depth =
Sum of deviations (add amounts computed in #12)
Number of. gauges within the effective width
14. Determine the application uniformity. The application uniformity is often computed using the
mathematical formula referred to as the Christiansen- Uniformity Coefficient. It is computed as follows;
U _ Average application depth (#11) — average. deviation (#14) X 100
Average depth (#11)

STATIONARY SPRINKLER
IRRIGATION SYSTEM
CASE III. (continued)
15.Interpret the calibration results, The -higher the index value, the.mote'uniform the application. An index of
100 would mean that the uniformity is perfect — the exact amount was -collected in every gauge.
An application uniformity greater than 75 Is excellent for stationary sprinklers.
Application uniformity between 50 to 75 is in the "good" range and is acceptable for wastewater
application.
Generally, an application uniformity. below 50 is novacceptable. for wastewater irrigation. If the computed
this less than 50, system adjustments are required. Contact your_; irrigation.dealer or Certified Technical
Specialist for assistance.
W O R K S H E E T 1, Example calibration data for a stationary sprinkler system operated in a
block pattern. (Setup as shown in Figure 1)
a. Effective sprinkler area: 80 ft by 80 ft = 6400 ft'
b. Spacing between collection containers (spacing 80 (ft)/4). 20 ft.
C. calibration area (W) 6400 ft2
Number of gauges = - = 16
effective gauge area (ft') - 20 ft x 20 ft
d. Start of Irrigation event 7:15 a.m.
e. End of Irrigation event 9:30 a.m.
f. Duration (e-d) 2.25 hours
g. Operate the system and collect data
Gauge No.
Volume
Collected
(inches)
Deviation from
Average'
(absolute value)
Gauge No.
Volume
Collected
(inches)
Deviation from
Average'
(absolute value)
1
.57
.005
9
.51
.065
2
.69
}
.115
10
.26
.315
3
.83
.255
11
.36
.215
4
.65
.075
12
.52
.055
5
.61
.035
13
.79
.215
6
.38
.195
14
.65
.075
7
.27
.305
15
.61
.035
8
.64
.065
16
.66
.285
` Record the absolute value of each deviation, so alf values are treated as positive.
33,

Field Calibration Procedures
For Animal Wastevvatar Application Equipment
W O R K S H E E T 1. (continued)
h. Sum of volume collected in all catches, .9.20 inches
L Average application depth WO (9.2/16) .576 Inches
0.576 inches
j. Precipitation rate = = 2.25 hour) 0.26 inches/hour .
(
k. Sum of ail deviations from the average depth 2.31
I. Average deviation from average depth (k/c) 0.144
m. Uniformity coefficient
0.576 — 0.144
Ur = X100=74.9
0.576
n. Interpret Results. Uniformity coefficient is in the good range, so no adjustments are necessary
W O R K S H E E T 2. Example calibration data for a stationary sprinkler system, one lateral
operated at a time. (Setup as shown in Figure 3.)
a. Effective sprinkler area; 80 It by 80 ft = 6400 ftz
b. Spacing between collection containers (spacing 80 (ft) / 4) = 20 ft
C. Calibration area (ft') 2 x 80 ft x 80 ft
Number of gauges = _ = 32
Effective gauge area (W) 20 ft x 20 ft
d. Start of Irrigation event 7:15 a.m.
e. End of Irrigation event 9:30 a.m.
f. Duration (e-d) 2.25 hours
g. Operate the system, collect data, and record on the worksheet on page 13, opposite.
h. Sum of all catches 10.91 inches
L Average application depth (h/16) 0.682 inches
j. Sum of all deviations from the average depth 1-,866
k. Average deviation from average depth 0.117
I. Uniformity coefficient
0.682 — 0.117
UC= X100 =82.8
0.682
m. Interpret Results. Uniformity coefficient is in the excellent range for a stationary sprinkler system.
No adjustment necessary.
44

STATIONARY SPRINKLER
IRRIGATION SYSTEM
WORK .SHEET
Gauge No.
2. (continued
Volume
Collected
(inches)
'Overlap-.
:Adjustment •
` Deviation
from Average'
L1
.00
.67 (L1 + R1)
.012 (1-1+111) - i)
L2
.15
.64: (L2 + R2)
:.042 (1-2+112) - i)
L3
.38'
JZ(L3 + R3)
.038 (etc) .
L4
.71
.71 (L4 + R4)
.026
L5
.02
•.86 (L5 + 115)
.178
L6
.20
.79 (etc)
,108
L7
.43
.53
.152
L8
.78
.80
.118
L9
.04
.82
.138
L10
.33
.94
.258
L11
,51
.74
.058
L12
.fig
.69
008
L13
.00
.51
.172
L14
.11
.44
.242
L15
.37
.47
.212
L16
.58
.58
.102
"Record the absolute value; treat all values as positive.
R1
.67
R2
.49
R3
.34
R4
.00
R5
.84
R6
.59
R7
.10
R8
.02
R9
.78
R10
.61
R11
.23
R12
.00
R13
.51
R14
.33
R15
.10
R15
'00
55 • •

Field Calibration Procedures
for Animal Wastewater. Application Equipment
would be performed twice since only two guns or gun locations contribute'to the calibration. `
W O R K S H E E T 3. Example calibration,data'for a. stationary_sprinkler system, one lateral_
operated at a time, no overlap from adjacent laterals.. (Setup as.showri in. Figure.5, lateral B.)
.J
a. Determine the wetted diameter of a sprinkler.
From manufacturers literature, wetted diameter is 160 feet,. sprinkler spacing along lateral is-100 feet.
b. Determine the necessary spacing between collection gauges,
sprinkler spacing(feet]
parallel to lateral = = = 25 feet
4 4
sprinkler wetted diameter To=ee
perpendicular to lateral = _ = 20 feet
B 8
c. Determine the number of gauges required.
Will calibrate both sides of lateral at. one time so need 32 collection gauges
First row of gauges should be located a distance of 1/2 the gauge spacing from the lateral line. i.e.,
if the gauge spacing is 20 feet, first row of gauges should- be 10 feet from the lateral.
d. Start of irrigation event 7:15 a.m.
e. End of irrigation event MO a.m.
f. Duration (e-d) 2.25 hours
g. Operate the system and collect data
h. Add the non zero amounts collected and divide by the number of gauges with a non -zero amount. This is
the average application depth (inches) within the "wetted" calibration area,
Sum of non zero catches in column 3 = 12.59 inches
Number of gauges with non -zero catch = 28 gauges
-12.59 incomes
Average catch all non -zero gauges = = 0.45 inches
28 gauges
i. Determine the average application r;+epth by roars. Indude zero catches in the row computations.
Row averages are shown in column 4.
j. Identify and delete those rows whose average application depth (#l) is less than one-half the average
application depth (#h).
Application depth of Row L4 is 0.05 inches and Row R4 is 0.04 inches so discard row 4 values on both
sides (left and right) of lateral.
k. Determine the effective application width.
Row 3 is last usable row and is located 50 feet from lateral (column 3). Therefore, effective width is 50
feet on each side of lateral or 100 Feet total.
0

STATIONARY SPRINKLER
IRRIGATION SYSTEM
WORK SHEET
3. (continued)
'ry
Distance
Volume
Row
Usable
Gauge No,
from
Collected::
Average; :.
Values
frort� Average , � `
Lateral
(inches)
L11
10
77
77
F .
2E0, j'
L12
10
.69
L13
.10
.83
-.83
`324;
L14
10
.65
'.74
.65
14a.
L21
30
.61
.61
.10D
L22
30
.57
.57
.060
L23
30-
.48
.48
.030 :_.
L24
30
.44
.53
.44
L31
50 .
.31..
.31
200':
L32
50
.22
.22
r:290;'
L33
50
.18
.18
.330;.
L34
50
.29
.25
.29
::22D+'°':_
L41
70
.12
L42
70
.0
L43
70
.0
L44
70
.08
.05 (discard)
.160
R11
10
.67
.67
R12
10
.79
.79
.280
R13
10
.81
.81
.300
R14
10
.77
.76
.77
.260 '
R21
30
.59
.59
.080
R22
30
.51
.51
.000
R23
30
.62
.62
.110
R24
30
.5
.56 .50
.010 .
R31
-50
.37
.37
140
R32
50
.17
.17
.340
R33
50
.15
.15
.360
R34
50
24
.23 .24
.270
R41
70.
.07
R42
70
.4
R43
70
.0
R44
70
.09 .04 (discard)
I�

i`ieid Calibration Procedures
for Animal Wastewater Application Equipment
WORK SHEf 3 T (ontihued) c , �f
I: 'Determine the average application depth Mthro theaeffective area Add amounts from all:gauges m raves.
withI the.effecti4wiidth (Rows1;, 2' and 3"on botKsides
Usable values are shown in: column, 5 sum of amounts collected in rows within effective width (sum of
column 5) = 1 p
2.23::irtches b a
} T 12 23 Inches a I r
Average' application depth ;,7 ' 0 51'inches
24. gauges '
m. Calculate the deviatiori.depth �for each gauge Values shown iR'1 column 6
Deviation depth. _ JDepth collected at: posidonl-average application depth (#t)l-
i refers to the gauge position within.the'effectivd'calibration'area
n. Sum of deviations (slim of values:in column,6) =-4.511 inches
.4'. 41511 inches -
Average: deviation depth " 0188`inches
i' 24: gauges
o. uetermine, the application uniformity:
0.51 inches (#I) - 0.188`inches (#n) ..'
Ue= X100a63.1 S
0.51 - inches (#I)
p. Interpret the calibration results.'An index value of 63 percent is acceptable for a stationary sprinkler system.
No adjustments are needed.

STATIONARY SPRINKLER
IRRIGATION SYSTEM
Irrigation System Cafibration Data Sheet for Stationary Sprinkler
Date Farm Tract No:
a. Effective sprinkler area: Lateral spacing ft by spacing along lateral ft = .
Sprinkler: Make Model Nozzle Dia. Discharge GPM
Pressure: Sprinkler Pump Pressure
b. Spacing between collection containers (sprinkler spacing (ft)/4) =
c. Number of collection containers
d. Start of Irrigation event
e. End of Irrigation event
f. Duration (e-d) hours
g. rJperate the system, collect data, and
record on the worksheet on page 18.
h. Sum of all catches inches
ft
0
0
s0
"0
0
z0
0
zo
Z0
6
0
,0
0
,.
0
,o
z0
zo
I'0
'0
'
�fi0
'0
�50
'p
z0
20
' (�
40
'lJ
''J
20
Zo
'
180
I
1280
^
i. Average application depth (h/c) inches
j. Precipitation rate = - inches/hr
k. Sum of all deviations from the average catch
I. Average deviation from average application depth
m. Uniformity coefficient
UC =
Interpret the calibration results
(1)
—X100=
An application uniformity greater than
75 is excellent for stationary sprinklers.
Application uniformity between 50 to
75 is in the "good" range and is
acceptable for wastewater application.
Generally, an application uniformity
below 50 is not acceptable for waste-
water irrigation, if the computed Uc is
less than 50 percent, system adjustments
are required. Contact your irrigation
dealer or Certified Technical Specialist
for assistance.
ft2
0
Wind direction
" Wind speed
`
SO
gO
130 117
Z 0
25`
29`
20
60
7Q0
' 0
is
0
2O
20
30
J
0-0
7
11
0
'
0
' 0
23
0
27
0
31 _ .
40
e0
, O
z0
z0
Z0
O

Field Calibration Procedures
for Animal Wastewater Application Equipment

STATIONARY SPRINKLER
IRRIGATION SYSTEM
Mi
,
0
�
0
9
0
13
0
,0
20
Z0
20
2 0
0
10
140
is
220
260
0-
3
30
'0
'0
10
10
20
0
30
4
0
s
0
, 0
'
200
�0
z0
30
NOTE: While in the field, it may be less confusing to
record measured values in the grid above, then
transfer these values to the data sheet for
calculation and interpretation.
0

Prepared by
R.O. Evans, Biological and Agricultural Engineering Extension Specialist
J.C. Barker, Biological and Agricultural Engineering Extension Specialist
J. T.• Smith, Biological and Agricultural Engineering Extension Assistant Specialist
R.E. Sheffield, Biological and Agricultural Engineering Extension Specialist
5,000 copies of this public document were printed at a cost of S3,084, or $.62 per copy.
Published by
NORTH CAROLINA COOPERATIVE EXTENSION SERVICE
Distributed in furtherance of the Acts of Congress of May 8 and June 30, 1914, Employment and program opportunities are offered to all people
regardless of race, color, national origin, sex, age, or disability, North Carolina State University, North Carolina A&T State University, U.S. Depart•
ment of Agriculture, and local governments cooperating.
4/97-- SM—JMG/KEL AG-553-1
E97-30397

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wAT�
NO. Larry Stallings
Larry & Barbara Stallings Farm
779 Turnpike Road
Belvidere, NC 27919
Dear Mr. Stallings:
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. 14imek, P.E. Director
Division of Water Quality
February 2, 2004
SUBJECT: NOTICE OF DEFICIENCY
Animal Feedlot Operation Compliance Inspection
Larry & Barbara Stallings Farm
Facility No. 72-14
Perquimans County
This letter is to notify you that the subject facility is in violation of its Certified Animal Waste Management Plan, General
Permit, Title 15A North Carolina Administrative Code, Subchapter 2H, Section .0217(d) and N.C.G.S. 143-215.1.
On July 8, 2003, Scott Vinson from the Washington Regional Office of the Division of Water Quality (DWQ) conducted an
Animal Feedlot Operation Compliance Inspection at the Larry & Barbara Stallings Farm in Perquimans County. A copy of
the inspection report is attached for your review. In general, the Compliance Inspection was to determine if: (1) the farm has
a Certified Animal Waste Management Plan (CAWMP); (2) the farm is complying with requirements of the State Rules 15
NCAC 2H.0217, Senate Bill 1217, and the Certified Animal Waste Management Plan; (3) the farm operation's waste
management system is being operated properly under the direction of a Certified Operator, (4) the required records are
being kept; and that (5) there are no signs of seepage, erosion, and/or runoff. The following deficiencies were observed
dudng'the inspection:
i On August 12, 2003 records for the facility were forwarded to the Office for review. There were some irrigation
events in late March that did not have a current waste analysis. In accordance with condition III, item 4 of your
General Permit, an analysis of animal waste shall be conducted as close to the time of application as practical and
at least within 60 days (before or after) of date of application.
It is very important as the owner and/or the Operator in Charge that these aforementioned violations and any other problems
that may arise be resolved, as soon as possible. For additional assistance, please contact your Technical Specialist.
Thank you for your cooperation and assistance. If you have any questions concerning this matter, please contact me at
[phone], ext. 208.
R
Scott Vinson
Environmental Engineer
cc: Perquimans County SWCD Office
DSWC-WaRO
DWQ Central Files
�,WaRO_ .
SAV Files
i'D
943 Washinaton Souare Mali Washington. NC 278M 12521946-6481 (Telephone) (2521948-9215 (Fax) Customer Service

Type of Visit O Compliance Inspection O Operation Review O Lagoon Evaluation
Reason for Visit O Routine O Complaint O Follow up O Emergency !Notification O Other ❑ Denied Access
Date or visit: 07lOSRl)l13 Time; 11:3$
Facility Number 14
Q Not Operational Q Below Threshold
® Permitted ® Certified 13 Conditionally Certified [] Registered Date Last Operated or Above Threshold: .........................
Farm Name: X,argA.B,ACht =.5t9Ujw F.arM....................................................... County: PcrQ A'IM1i W.................................... W.RQ.......
Owner Name: LamlZaAAm ................... :sl aftg&... ... ........ ........... .......................... Phone No: (252).297z219 .............. ........... ..�....._......
MailingAddress: V2-TwMjA ] twW............................................................................ 1WA.NC........................................................_ 2,7912 ...........
FacilityContact: .............................................................................. Title................................................................. Phone No:.................................................,.
Onsite Representative: noonte.9mIte._............................................................................ Integrator: ......... ............... .......................... ... ............................
Location of Farm:
miles North of intersection of Sandy Cross Rd. and Turnpike Rd. on Turnpike Rd., SR 1001 in Perquimans County.
® Swine ❑ Poultry ❑ Cattle ❑ Horse Latitude F 36 21 13 1u Longitude_ 1 76 F 31 u
Disc_ his & Stream Impacts
1. Is any discharge observed from any part of the operation?
Discharge otioated at: ❑ Lagoon ❑ Spray Field ❑ Other
a. If discharge is observed, was the conveyance man-made'?
b. If discharge is observed, raid it reach Water of the Stale? (If yes _ not4 DWQ)
c. If discharge is observed, what is the estirnaled tlmv in gal/min?
d.- - Does discharge bypass a lagoon systerii?'(If Yes"ri6lify DWQ)
2. Is there evidence of past discharge from any part of the operation?
3. Were there any adverse impacts or potential adverse impacts to the Waters of the State other than from a discharge?
Waste Collection & Treatment
4. Is storage capacity (freeboard plus storm storage) less than adequate? ❑ Spillway
Structure I Stiveture 2 Stnicture 3 Stnicture 4 Structure 5
Identifier: ...........................................................................................................
❑ Yes
® No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
® No
❑ Yes
®No
❑ Yes
® No
Stnicture 6
Freeboard (inches): .... -... 2i1....... . ................

U5103VUL
Facility Number: 72 —14
Date of Inspection 07/08/2003
5. Are -there any immediate threats to the integrity of any of the structures observed? (ie/ trees, severe erosion,
seepage, etc.)
6. Are there structures on -site which are not properly addressed and/or managed through a waste management or
closure plan?
(If any of questions 4-6 was answered yes, and the situation poses an
immediate public health or environmental threat, notify DWQ)
7. Do any of the structures need maintenance/improvement?
8. Does any part of the waste management system other than waste structures require maintenance/ nprovement?
9. Do any stuctares lack adequate, ganged markers with required maximum and minimum liquid level
elevation markings?
Waste ApRlicatfQn
10. Are there any buffers that need mamtenance/miprovement?
11. Is there evidence of over application? ❑ Excessive Ponding ❑ PAN ❑ Hydraulic Overload [
12. Crop type Coastal Bermuda (Hay) Fescue (Graze)
❑ Yes ® No
❑ Yes ® No
❑ Yes ® No
❑ Yes ® No
❑ Yes ® No
❑ Yes ® No
❑ Yes ® No
13. Do the receiving crops differ with those designated in the Certified Animal Waste Management Plan (CAWMP)? ❑ Yes ® No
14. _aDoes the facility lack adequate acreage for land application? ❑ Yes ❑ No
b) Does the facility need a wettable acre determination? ❑ Yes ❑ No
c) This facility is pended for a wettable acre determination? ❑ Yes ❑ No
15. Does the receiving crap need improvement?
16. Is there a lack of adequate waste application equipment?
Required -Records & Documents
17. Fail to have Certificate of Coverage & General Permit or other Permit readily available?
I & Doesthe-facility-fail to -have all components of the Certified Animal Waste Management Plan readily available?
WvP, citecklists,.d-esign, maps. etc.)
197 Does iecord keeping need improvement? (ic/ irrigation, freeboard,=waste analysis & soil sample reports) -
20. Is facility not in compliance with any applicable setback criteria in_effect at the time of design? • -
21. Did the facility fail to have a.activelyoertifed operator in chaff 0-----._
22. Fail to notify regional DWQ of emcrgency situations as required by General Permit?
Oe/ discharge, freeboard problems, over. application)
23.. Did Reviewer/Inspector fail to discuss review/inspection with on -site representative?
:'241---D6es facility fegdire a follow-up visit by same agency?
❑ Yes IN No
❑ Yes ® No
❑ Yes ® No
❑ Yes
® No
" ® Yes
❑ No
❑ Yes
® No
❑ Yes ,
® No
❑ Yes
® No
❑ Yes
® No
❑ Yes
- ® No.
25. Were any additional problems noted which cause noncompliance of the Certified AWMP? ❑ Yes ® No
0 No violations or deficiencies were noted during this visit. You will receive no further correspondence about this visit.
❑ Field Copy ❑ Final Notes
* Freeboard level has previously been reported by Mr. Stallings as reaching as high as 12" after receiving help in resurveying the lagoon
from Bill Blackwell, Perquimans S&W. A letter requesting irrigation records, waste analysis, etc. should have already been sent by Raleigh
staff' Please forwarcfthese-requested record_ s to my office at 943 Washington Square Mall, Washington, NC 27889.
7) Please have the back side of the lagoons, nearest the woods, mowed down to the toe of dike will is order to help with routine visual
inspections of lagoon structure. -1f. a rodent were.to Burrow into the dike wall it would be hard to detect through the tall weeds. -
*Overall the farm looks well maintained.
* Please call me before sending in records at 252-946-6481, ext 208.. -- - . _ .. _
Reviewer/inspecter Name
Reviewer/Inspector Si¢aatm

05103101 Continued
Facility Number: 72-14 Date of inspection 07/08/2003
t�
Odor Issues
26. Does the discharge pipe from the confinement building to the storage pond or lagoon fail to discharge at/or below ❑ Yes ❑ No
liquid level of lagoon or storage pond with no agitation?
27. Are there any dead animals not disposed of properly within 24 hours? ❑ Yes ® No
28. Is there any evidence of wind drift daring land application? (i.e. residue on neighboring vegetation, asphalt, ❑ Yes ® No
roads, building structure, and/or public property)
29. is the land application spray system intake not located near the liquid surface of the lagoon? ❑ Yes No
30. Were any major maintenance problems with the ventilation fan(s) noted? (i.e. broken fan belts, missing or
or broken fan blade(s), inoperable shutters, etc.) ❑ Yes ® No
31. Do the animals feed storage bins fail to have appropriate cover? ❑ Yes ® No
32. - Do the flush tanks lack a submerged fill pipe or a permanent/temporary cover? ❑ Yes ❑ No
received in WaRO-oa Augusf 12-, 2003.- - _.. _.. --- _.. _ ...._. ---- __ .---- - -.- . --- -_
19) There were some irrigation events in late March that did not have a current waste analysis. Remember to have a waste analysis
thin 60 days before or after all irrigation events.
# Waste 1/17/03 w/ 2.0 ibsN/1000gal., 6/23/03 w/ 2.5 lbsN, & 7/23/02 with 3.3 lbsN.
J

W A rFR
Michael F. Easley, Governor
of
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
GJ
Alan W. laimek, P.E. Director
j
Division of Water Quality
October 21, 2002
Mr. Larry Stallings
Larry & Barbara Stallings Farm
779 Turnpike: Rd.
Belvidere, NC 27919
Subject: Notice of Deficiency
Animal Compliance Evaluation Site Inspection
Larry & Barbara Stallings Farm
Facility No_ 72-14
-Dear Mr. Stallings,
Enclosed please find a copy of the Compliance Site Inspection (as viewed in the DWQ database) conducted at the
referenced facility by the Division of Water Quality from the Washington Regional Office. Please read this
inspection and keep it with all other documents pertaining to your animal operation for future, inspections.
In general, these inspections included verifying dot: (1) the farm has a Certified Animal Waste Management Plan
(CAWMP); (2) the farm is complying with requirements of the State Rules 15 NCAC 21-.0217, Senate Bill 1217, and
the Certified Animal Waste Management Plan; (3) the farm operation's waste management system is being operated
properly under the direction of a Certified Operator; (4) the required records are being kept; and (5) there are no signs
of seepage, erosion, and/or runoff The following deficiencies were noted during the inspection.
There were two waste application events on March 29, 2002 that did not have a current waste analysis_ In
accordance with condition III, item 4 of your General Permit, an analysis of animal waste shall be conducted as
close to the time of application as practical and at least within 60 days (before or after) of date of application. The
analysis shall include the following parameters: Nitrogen, Phosphonis, Zinc and Copper_ Trytaking a waste
analysis quarterly in order to avoid being outside the 60 day window.
As a reminder, please note the following comments, which are conditions of the Certified Animal Waste Management
Plan and the General Permit; therefore, these items must be implemented:
(p The maximum waste level in lagoons/storage ponds shall not exceed that specified in the CAWMP. At a
minimum, maximum waste level for waste for lagoons/stomge ponds must not exceed the level that provides
adequate storage to contain 25 year, 24 hour storm event plus an additional foot of structural freeboard
q) An analysis of the liquid animal waste from the lagoon shall be conducted as close to the time of application as
practical and at least within 60 days (before or after) of the date of application. This analysis shall include the
following parameters: Nitrogen, Phosphorus, Zinc and Copper.
(p Soil analysis is required annually. Lime is to be applied to each receiving crop as recommended by the soil
analysis:
cp The following records are required: off -site solids removal, maintenance, repair, waste/soil analysis and land
irrigation records. These records should be maintained by the facility owner/manager in chronological and legible
form for am iniminn of three years.
(p Land application rates shall be in accordance with the CAWMP. In no case shag land application rates exceed the
Plant Available Nitro (PAN) rate for the receivi iz crop or result in runoff durine any riven amlication.
(p All grassed waterways shall have a stable outlet with adequate capacity to prevent ponding or flooding damages.
The outlet can be another vegetated channel, an earth ditch, stabilization structure, or other suitable outlets.
(p It is Mggq tpd, not a requirement; to keep crop yield information for futwe use to update your waste management
plan. You will need three years of crop yield data before your plan can be updated
NCDENE
943 Washington Square Matl Washington, NC 27889 [phone] (telephone) [phone] (Fax)
Customer Service

Page 2
Larry & Barbara Stallings Farm
Facility No. 72-14
q) The OIC has the duties to ensure that waste is applied in accordance with the CAWW and General Permit by
properly managing, supervismg, and documenting daily operation and maintenance. The OlC also has the
responsibility to certify monitoring and reporting information The failure of an OIG to perform his/her duties can
result in a letter of reprimand, suspension, of certification, or revocation of certificates.
For your information, any swine facility that has a discharge to surface waters of the State will have to apply for a
National Pollutant Discharge Elimination System (NPDES) permit with the Division of Water Quality, effective
January 1, 2001.
Thank you for your assistance and cooperation during the inspection.. If you have any questions, please contact me
at 252-946-6481, ext. 208-or your Technical Specialist -- •-- -- . .- .
Sincerely,
Aq
Scott Vinson
Environmental Engineer
Cc: - NCDSWC-WaRO (w/o attachments)
vWARO Files
SAV Files
s

FM,
r
f • -
Facility Number.
Date of Visit: .. 5114MUZ . Time: 1U:UU F _
t + ` - _
p of pe tional oBelowThresbold
_
Permitted :' Certified Conditionally Certified
■ ■ o y
R istered `"
Date Last Operated or Above Thresbold:--••••------••-•••••••..
Farm Name:. Larry & Barbara Stallings Farm=
County: Palgiaimxaus..:-..:.............................WA.RO_......
Owner Name: Larry/Barbara Stallings
Phone No: [phone]
Mailing Address-ZZ'LTiu7,pe el��ad_w..�.—_....... _— _ Dklyideira.NC....... '.........:.......................... 279.1.9-_._........
�,� ;Facility
Contac#... �m..� .� . �_ ___Title:_
W _- .: .- Phone No :.......... .....
Ousife Representative: __ - . —_, �. .- _ .._-- - - Y Integrator :................-----.: ..................... .............. .........
t=
--
i.
Certified Operator:.Inscph.L,.. :-..... Stallings_......
_ _ ___.___. Operator Certification Number:193.7.5.............................
Location of Farm:
miles rNorthol mtersechon of Sandy Cross Rd. and
urnpia RdL on Turnpike 1M., SJK 1001 in Perquimans County.
® Swine (3 Poultry [3Cattle p Horse Latitude
®. �� Longitude ®. ©�
0
+. Discharges & Stream Impacts
t 1. Is any discharge observed from any part of the operation? p Yes R No
i Discharge originated at: 13 Lagoon p Spray Field .p Other
a. If discharge is observed, was the conveyance man-made? 13 Yes p No
b- If discharge is observed, did it reach Water of the State? (If yes, notify DWQ) p Yes p No
c. If discharge is observed, what is the estimated flow in gal/min?
d. Does discharge bypass a lagoon system? (If yes, notify DWQ) p Yes ❑ No
2. Is there evidence of past discharge from any part of the operation? p Yes ® No
3. Were there any adverse impacts or potential adverse impacts to the Waters of the State other than from a discharge? C] Yes ® No
Waste Collection & Treatment
4. Is storage capacity (freeboard plus storm storage) less than adequate? p Spillway p Yes ® No
Structure I Structure 2 Structure 3 Structure 4 Structure 5 Structure 6
Identifier:
Freeboard (inches) : ...............43....

3
f:
r-
Facility Num b er: 72-14 Date of Inspection 0/200
5. Are there any immediate threats to the integrity of any of the structures observed? (ie/ trees, severe erosion,
[3 Yes
N No
seepage, etc.)
6. Are there structures on -site which are not properly addressed and/or managed through a waste management or
closure plan?
(If any of questions 4-6 was answered yes, and the situation poses an
p Yes
® No
immediate public health or environmental threat, notify DWQ)
7. Do any of the structures need maintenance/improvement?
p Yes
® No
8. Does any part of the waste management system other than waste structures require maintenance/improvement?
p Yes
® No
9. Do any stuctures lack adequate, gauged markers with required maximum and minimum liquid level
elevation markings?
p Yes
®No
Waste Application
10. Are there any buffers that need maintenance/improvement?
p Yes •
N No
11. is there evidence of over application? p Excessive Ponding 13 PAN p Hydraulic Overload
p Yes
N No
12. .Crop type _ Coastal Bermuda (Hay) _ _ . Fescue (Graze)
13. Do the receiving crops differ with those designated in the Certihed.Aaimal Waste Management Plan (CAWMP)?
❑ Yes
® No
14. a) Does the facility lick adequate acreage for land application?
t
p Yes
p No
b) Does the facility need a wettable acre determination?
p Yes
p No
c) This facility is pended for a wettable acre determination?
❑ Yes
p No
15. Does the receiving crop need improvement?
p Yes
® No
16. Is there a lack of adequate waste application equipment?
p Yes
® No
Reouired Records & Documents
17. Fail to have Certificate of Coverage & General Permit or other Permit readily available? p Yes ig No
18. Does the facility fail to have all components of the Certified Animal Waste Management Plan readily available?
(ie/ WUP, checklists, design, maps, etc.) p Yes ® No
19. Does record keeping need improvement? (ie/ irrigation, freeboard, waste analysis & soil sample reports) N Yes p No
20. Is facility not in compliance with any applicable setback criteria in effect at the time of design? p Yes ®No
2I. Did the facility fail to have a actively certified operator in charge? .p Yes ®No
22. Fail to notify regional DWQ of emergency situations as required by General Permit?
(ie/ discharge, freeboard `problems, over application) p Yes ® No
23. Did Reviewer/Inspector fail to discuss review/inspection with on -site representative? z p Yes ®No
24. Does facility require a follow-up visit by same agency? p Yes ® No
25. Were any additional problems noted which cause noncompliance of the Certified AWMP? p Yes ® No
p o violations or, deficiencies were noted during this visit. You will receive no further cormspon ence a out this visit.
omenfs'(refer tertian .. gplainNUEEZ-4
nUse
fu
toetterexplain....itional+pages as.necessary): Field Copy p Final Notes ='
* Waste 7/23/02 with 3.3 lbs N/1000 gal.
* Soils dated 9/18/01 with lime required and applied.
* There were two events in March on Fescue (3/29/02 on 2 fields) that were outside the 60 day before/after
window. Remember to keep waste analysis within 60 days of irrigation events. No overapplication noted.
* Records are well maintained and farm is well managed.
f you have any questions, please give me a call at 252-946-6481, extension 208.
Reviewer/Ins ector Name - = a t
p Seott �T>n ©b entffw by Ann Tyn l�
_
Reviewer/Inspector Signature: Date:

O5103101 Continued
n
ff"ic, ity umber, 72_14
Date of Inspection
Odor Issues
26. Does the discharge pipe from the confinement building to the storage pond or lagoon fail to discharge at/or below 0 Yes p No
liquid level of lagoon or storage pond with no agitation?
27. Are there any dead animals not disposed of properly within 24 hours? p Yes ® No
28. Is there any evidence of wind drift during land application? (i.e. residue on neighboring vegetation, asphalt, p Yes ® No
roads, building structure, and/or public property)
29, Is the land application spray system intake not located near the liquid surface of the lagoon? p Yes ® No
30. Were any major maintenance problems with the ventilation fan(s) noted? (i.e. broken fan belts, missing or
or broken fan blade(s), inoperable shutters, etc.) 13 Yes ® No
31. Do the animals feed storage bins fail to have appropriate cover? p Yes ® No
32, Do the flush tanks lack a submerged fill pipe or a permanent/temporary cover? p Yes 13 No
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