MDS Implementation Guidelines
MDS II Calculation Form

| 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 development reasonably expected to be impacted by a proposed first or expanded livestock facility. Applicable topics are found in the Implementation Guidelines Chart on pages 9 to 25 and applicable Tables are noted.

Step 1: Location and Contact Information

Fill in the pertinent information about the applicant who is proposed a first, or expanded, 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

Fill in all existing, and proposed to be added, animal/material types, descriptions, the total maximum housing capacity, the number of animals/material per Nutrient Unit (NU) and associated manure forms. Table 1 and 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 and proposed to be added Nutrient Units (NU)

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

Step 4: Weighted Factor A

Determine Factor A (Odour Potential Factor) from Table 1, for only each animal/material type proposed to be added and fill in the calculation form. If necessary, calculate the weighted average for Factor A, if Factor A is not the same for all animals/materials added. 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 only each animal/material type added, and fill in the calculation form. If necessary, calculate the weighted average for Factor D, if Factor D is not the same for all animals/materials added. See Implementation Guidelines 29 and 32 for further direction.

Step 6: Factor B

Determine Factor B from Table 2, based on the Total NU to be housed at the livestock facility, and fill in the space on the calculation form. In some cases, it will e necessary to interpolate Factor B from Table 2, when the number of NU is not specifically identified in the table. Implementation Guideline 27 provides more specific direction on Factor B.

Step 7: Determining Percentage Increase for livestock facility

Determine if a building permit was issued on this lot in the past 3 years that increased the livestock capacity of the livestock facility.

If 'No', use Approach (i) below to calculate Percentage Increase.

If 'Yes' use Approach (ii) below to calculate Percentage Increase.

Approach (i)

Enter total Added NU as calculated in Step 3 above. Enter total Existing NU as calculated in Step 3 above. If total Existing NU is zero (i.e. this is the First Livestock Facility on the lot), then the Percentage Increase is considered to be at its maximum, or 700% as per Table 3. If total Existing NU is not zero, divide Added NU by Existing NU and multiply by 100. This value is the Percentage Increase. In rare cases of downsizing, the Added NU would actually be 'negative'. In this case, the Percentage Increase is 'negative', but considered to be at its minimum, or 0% as per Table 3.

Approach (ii)

Enter total Added NU as calculated in Step 3 above, as well as the total number of NU added in the past 3 years by previous building permit(s). Enter total existing NU of the livestock facility as it was 3 years ago, prior to the current application date. If total Existing NU 3 years ago and was zero, then the livestock facility in this current application and the one(s) constructed in the past 3 years are all considered to be the First Livestock Facility on the lot, and the Percentage Increase is considered to be at maximum, or 700% as per Table 3. If total Existing NU 3 years ago was not zero, divide Added NU in this application plus Added NU over the past 3 years, by Existing NU 3 years ago and multiply by 100. This value is the Percentage Increase. In rare case of downsizing, the Added NU would actually be 'negative'. In this case, the Percentage Increase is 'negative', but considered to be at its minimum, or 0% as per Table 3.

Implementation Guideline 28 provides further direction and assistance on calculating Percentage Increase, and establishing Factor C.

Step 8: Factor C

Determine and fill in Factor C (Orderly Expansion Factor) on the calculation form, based on the Percentage Increase calculated in Step 7. Factor C can be determined from Table 3. In some instances, it may be necessary to interpolate Factor C. Implementation Guideline 28 provides direction on calculating the Percentage Increase in NU for the proposed construction.

Step 9: F, Building Base Distance

Calculate F (Building Base Distance) = (Factor A) x (Factor D) x (Factor B) x (Factor C), which is the required mDS II setback from all proposed first or expanded livestock facilities to the nearest development. For further information, see Implementation Guidelines 23 and 34.

Step 10: S, Manure Storage Base Distance

Establish S (Manure Storage Base Distance) by first using table 5 to choose the proposed new 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 may be necessary to interpolate from the table. 'S' is the required MDS II setback from all proposed new storages to the nearest development. Implementation Guidelines 24 and 25 provide further information. Implementation Guidelines 21 and 22 provide further information on dealing with anaerobic digesters.

Now What? Using calculated MDS

The calculated values of MDS II can now be applied to the building permit application. Implementation Guidelines 35 through 39 provide direction around Type A and Type B land uses. For Type A land uses, the values of Building Base Distance 'F' and Storage Base Distance 'S' should be multiplied by 1.0 to determine the required MDS setback. For Type B land uses, the values of Building Base Distance 'F' and Storage Base Distance 'S' should be multiplied by 2.0 to determine the required MDS setback. Implementation Guideline 40 provides direction around setbacks from rear lot lines, side lot lines and road allowances. For rear and side lot lines, the values of Building Base Distance 'F' and Storage Base Distance 'S' should be multiplied by 0.1 to determine the required MDS setback. In accordance with Implementation Guideline 44, the required MDS setback from a rear or side lot line should never exceed 30 metres. For road allowances, the values of Building Base Distance 'F' and Storage Base Distance 'S' should be multiplied by 0.2 to determine the required MDS setback. Implementation Guidelines 41 through 44 provide direction around issues of measurement of MDS II setbacks. Implementation Guidelines 45 and 46 provide direction on issues regarding minor variances.

Example

Mr. Jones proposes to build a second 1200 head swine feeder barn with concrete liquid manure storage to go along with his existing:

  • 1200 head swine feeder barn over a slatted floor where all swine manure is stored;
  • 33000 bird chicken broiler barn (9-week cycle) with solid manure storage outside, uncovered, dry enough for a flowpath option;
  • 10 m x 12 m x 2 m permanent concrete storage with flowpath option, for his imported solid dairy manure; and
  • The existing facilities were constructed more than 3 years ago.

How far must the proposed barn be sited from all development reasonably expected to be impacted?

Evaluator: ___________________________________________________________

Date: _______________________________________________________________

File Number: _________________________________________________________

Applicant Information:

First Name: Jim

Last Name: Jones

Farm/Company: Swiney-Acres Farm

Address: 124 New Road

City/Town: Somewhere

Province: Ontario

Postal Code: N0G 0J0

Upper Tier: Upper Somewhere

Lower Tier: Lower Somewhere

Lot: 2

Concession: 2

Fire Number: 123456

Roll Number: 667

Telephone: 905-555-3333

Fax: 905-555-4444

Email: jjones@newroad.ca

MDS II Calculation Form

Animal Type or Material Description Number per NU Manure Form Existing Maximum Housing Capacity Existing NU Proposed Maximum Housing Capacity Added NU Total NU Factor A Factor AD
Swine Feeders
(27 kg - 105 kg)
6 Liquid 1200 200 1200 200 400 1.2 0.8
Chickens Broilers
(9 week cycle)
300 Solid 33000 110 N/A N/A 110 N/A N/A
Imported Manure Maximum Capacity (10m x 12m x 12m) 19.8 Solid 240 12 N/A N/A 12 N/A N/A

Total Existing NU = 322
Total Added NU = 200
Total NU = 522

Factor A (Odour Potential Factor)... weighted average may be necessary = 1.2
Factor D (Manure Form Factor)... weighted average may be necessary = 0.8
Factor B (Nutrient Units Factor) = 563

Has a building permit been issued for the livestock facility on this property in the last 3 years that has increased its livestock capacity? No? Yes? If no, proceed to Approach (i); if yes, proceed to Approach (ii).

Approach (i) - No Building Permits in Last 3 Years

Calculation of Percentage Increase

Total 2 - Total Added NU (from above) = 200
Total 1 - Total Existing NU (from above) = 322

If Total 1 = Zero, Treat as a First Livestock Facility

% Increase = (Total 2/Total 1) x 100 = 62.1%

Approach (ii) - Building Permit(s) Issued in Last 3 Years

Calculation of Percentage Increase

Total 2 - Total Added NU (from above) + Total Added NU from building permit(s) issued in the last 3 years
Total 1 - Total Existing NU at Livestock Facility 3 years ago

If Total 1 = Zero, Treat as First Livestock Facility

% Increase = (Total 2/Total 1) x 100

Factor C = 0.825
F (Building Base Distance, m) = Factor A x Factor D x Factor B x Factor C = 446
S (Manure Storage Base Distance, m) = 446

Now What?

Apply MDS calculation to building permit application as appropriate. For Type A land uses, the values of Building Base Distance 'F' and Storage Base Distance 'S' should be multiplied by 1.0 to determine the required MDS setback. For Type B land uses, the values of Building Base Distance 'F' and Storage Base Distance 'S' should be multiplied by 2.0 to determine the required MDS setback. Implementation Guideline 40 provides direction around setbacks from rear lot lines, side lot lines and road allowances. For rear and side lot lines, the values of Building Base Distance 'F' and Storage Base Distance 'S' should be multiplied by 0.1 to determine the required MDS setback. In accordance with Implementation Guideline 44, the required MDS setback from a rear or side lot line should never exceed 40 metres. For road allowances, the values of Building Base Distance 'F' and Storage Base Distance 'S' should be multiplied by 0.2 to determine the required MDS setback.

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

 


For more information:
Toll Free: 1-877-424-1300
E-mail: ag.info.omafra@ontario.ca
Author: OMAFRA Staff
Creation Date: 01 October 2006
Last Reviewed: 01 October 2006