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MDS Implementation Guidelines
MDS I Calculation Form

Author: OMAFRA Staff
Creation Date: 01 October 2006
Last Reviewed: 01 October 2006

| Table of Contents | Preface | Background | Definitions | Implementation Guidelines |
MDS I Calculation Form | MDS II Calculation Form | Factor Tables | Appendix & Additional Information |

The following outlines the 10 Steps on how to calculate setbacks to all adjacent livestock facilities, reasonably expected to be impacted by an applicant's proposed development. The applicable topics found in the Implementation Guidelines Chart on pages 9 to 25 and the applicable Tables are noted in the steps below.

Step 1: Location and Contact Information

Fill in the pertinent information about the applicant, and each adjacent livestock facility within 1000 m or more, or the proposed development. Each livestock facility must be on its own separate lot and should be treated as separate calculations. All barns and structures located on one lot should be treated as part of the same livestock facility. Implementation Guidelines 1 through 16 provide direction on the general rules and application of the Minimum Distance Separation Formulae.

Step 2: Livestock facility animal/material types

For the first livestock facility identified in Step 1, fill in all of its existing animal/material types, descriptions, the total maximum housing capacity, the number of animals/material per Nutrient Unit (NU) and associated manure forms. Information on the existing animal/material types, descriptions, the total number of animals/material and associated manure forms should be obtained from the owner of the livestock facility. It may be necessary to verify this information independently. Information on the number of animals/material per Nutrient Unit (NU) can be determined from Table 1. Implementation Guidelines 17 through 20 provide guidance on determining livestock facility capacity. Implementation Guidelines 21 and 22 provide direction on dealing with anaerobic digesters.

Step 3: Existing Nutrient Units (NU)

Calculate the existing total maximum NU capacity of the livestock facility by dividing existing capacity of each animal/material types by the number of animals/material per NU as found in Table 1. Then, add all the existing NU together for all the types of animal/material present, to obtain the total maximum number of NU.

Step 4: Weighted Factor A

Determine Fact A (Odour Potential Factor) for each animal/material type present, from Table 1, and fill in the calculation form. If necessary, calculate the weighted average for Factor A, if Factor A is note the same for all animals/materials listed. See Implementation Guidelines 26 and 31 for further direction.

Step 5: Weighted Factor D

Determine Factor D (Manure Form in Permanent Storage Factor) from Table 1, for each animal/material type present, and fill in the calculation form. If necessary, calculate the weighted average Factor D, if Factor D is not the same for all animals/materials listed. See Implementation Guidelines 29 and 32 for further direction.

Step 6: Tillable hectares and potential NU

Fill in the maximum tillable hectares of land on the lot where the livestock facility is located, based on information obtained from the owner of the livestock facility. It may be necessary to verify this information independently. Calculate the potential total number of NU, which equals: # of tillable hectares x 7.5, up to a maximum of 300 NU. Implementation Guidelines 33 and 17 provide more specific information.

Step 7: Fact B and existing vs. potential NU

Compare the total number of existing NU calculated in Step 3 with the total number of potential NU calculated in Step 6. Using the greater of these two numbers, determine Factor B from Table 2, and fill in the correct space on the calculation form. In some circumstances, it will be necessary to interpolate Factor B from Table 2, when the number of NU is not specially identified in the table. Implementation Guideline 27 provides more specific direction on Factor B.

Step 8: Determine Factor E

Determine and fill in Factor E (Encroachment Lane Use Factor) on the calculation form. Factor E can be determined from Table 4. Implementation Guidelines 30 and 35 through 39 provide specific direction on Factor E and determination of Type A and Type B land uses.

Step 9: F, Building Base Distance

Calculate F (Building Base Distance) = (Factor A) x (Factor D) x (Factor B) x (Factor E), which is the required MDS I setback from the proposed development to the nearest barn of the livestock facility. For further information, see Implementation 23 and 34.

Step 10: S, Manure Storage Base Distance

Establish S (Manure Storage Base Distance) by first using Table 5 to choose the existing storage at the livestock facility with the highest odour potential: Very Low, Low, Medium and High. Then enter Table 6 under the appropriate column and read across using 'F' calculated from Step 9. It maybe be necessary to interpolate. S, is the required MDS I setback from the proposed development to the nearest manure storage at the livestock facility. Implementation Guidelines 24 and 25 provide further information. Implementation Guidelines 21 and 22 provide further information on dealing with anaerobic digesters.

Step 2 through 10 should be completed for any other livestock facilities present, in accordance with Implementation Guideline 6.

Now What? Using Calculated MDS

The calculated values of MDS can now be used in the context of the land use planning application for which they have been prepared. Implementation Guidelines 35 through 40 provide direction around issues regarding Type A and Type B land uses. Implementation Guidelines 41 through 44 provide direction around issues of measurement of MDS setbacks and Implementation Guidelines 45 and 46 provide direction on issues regarding minor variances.

Example

Ms. Smith proposes to create a new lot, on agricultural land, adjacent to Mr. Jones' Swiney-Acres Farm. This livestock facility has:

  1. 1200 head swine feeder barn over a slatted floor where all the swine manure is stored,
  2. 33000 bird chicken broiler barn (9-week cycle) with solid manure stored outside, uncovered, dry enough for a flowpath option; and,
  3. permanent concrete storage for imported solid dairy manure 10 metres wide x 12 metres long and 2 metre walls, with flowpath option.

The lot where all Mr. Jones' barns and manure storage has 60 tillable hectares. There are no other livestock facilities within 1000 m of the proposed lot. How far must Ms. Smith's proposed lot be from Mr. Jones' nearest barn and nearest manure storage?

Evaluator: ___________________________________________________________

Date: _______________________________________________________________

File Number: _________________________________________________________

Contact Information

 Applicant InformationOwner of Adjacent Livestock Facility #1Owner of Adjacent Livestock Facility #2, etc.
File Name
JaneJim(No other adjacent livestock facilities)
Last Name
SmithJones 
Farm/Company
N/ASwiney-Acres Farm 
Address
123 New Road124 New Road 
City/Town
SomewhereSomewhere 
Province
OntarioOntario 
Postal Code
N0G 0J0N0G 0J0 
Upper Tier
Upper SomewhereUpper Somewhere 
Lower Tier
Lower SomewhereLower Somewhere 
Lot
12 
Concession
22 
911 Number
1234512346 
Roll Number
666667 
Telephone
905-555-1111905-555-3333 
Fax
905-555-2222905-555-4444 
Email
jsmith@newroad.cajjones@newroad.ca 

MDS I Calculation Form

Animal Type of MaterialDescriptionNumber per NUManure FormExisting Maximum Housing CapacityExisting NUFactor AFactor D
SwineFeeders
(27 kg - 105 kg)
6Liquid12002001.20.8
ChickensBroilers
(9 week cycle)
300Solid330001100.70.7
Imported ManureMax Capacity
(10m x 12m x 2m)
19.8Solid240121.20.7
Total Number of NU322  
Factor A (Odour Potential Factor)... a weighted average may be necessary1.03 
Factor D (Manure Form Factor)... a weighted average may be necessary 0.76
Factor B (Nutrient Units Factor)475
Factor E (Encroaching Lane Use Factor)1.1

Maximum tillable hectares on the lot with the livestock facilities = 60 x 7.5 = 300 NU (Maximum 300 NU)

F (Building Base Distance, m) = Factor A x Factor D x Factor B x Factor E = 409

S (Manure Storage Base Distance, m) = 409

Now What?

Repeat MDS calculation process as appropriate for other livestock facilities in the vicinity. Apply calculated MDS in the context of the land use planning application for which they were prepared.

| Table of Contents | Preface | Background | Definitions | Implementation Guidelines |
MDS I Calculation Form | MDS II Calculation Form | Factor Tables | Appendix & Additional Information |

 

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