Recommended Set Back

Recommended Setback to development reference (m) from edge of Right of Way Land Use Residential Commercial* Industrial*

Low / Very Low Density

Medium / Low Density

High Density

Medium Density

High Density

High / Low Density

Diameter (NPS)

20 16 14 12 10

145 110 100

145 110 100

140

125

70 10 10 10 10 10 10 10 10 10

80 15 10 10 10 10 10 10 10 10

95 80 60 40 10 10 10 10 10

95 85 70 60 35 25 20 20 15

85 70 50 40 30 25 20

85 70 50 40 30 25 20

8 6 4 3 2

Storage Cavern

500

250

200

175

125

150

Land Use

Corresponding Activity Zone

Density

Industrial areas with effective occupancy levels of 25 people per hectare or greater. Industrial areas with effective occupancy levels of 0 to 25 people per hectare. Commercial areas with effective occupancy levels of 100 people per hectare or greater. Commercial areas with effective occupancy levels of 25 to 100 people per hectare. Commercial areas with effective occupancy levels of 0 to 25 people per hectare. Multi-story urban residential areas with population densities of 100 people per hectare (4000 dwelling units per square kilometer) or greater. Suburban residential areas with population densities of 25 to 100 people per hectare (1000 dwelling units per square kilometer). Rural or suburban fringe residential areas with population densities of 1.0 to 25 people per hectare (25 dwelling units per square kilometer). Rural areas with population densities of 0 to 1.0 people per hectare (4 dwelling units per square kilometer).

Industrial

High Density

Industrial

Low Density

Commercial High Density

Medium Density

Commercial

Commercial Low Density

Residential

High Density

Medium Density

Residential

Residential

Low Density

Very Low Density

Residential

• Use of the largest setback for the associated pipe diameter is recommended for industrial installation or hazardous material storage where the release of gas from the pipeline can cause the industrial installation to produce a dangerous or environmentally hazardous condition. Use of the largest setback for the associated pipe diameter is recommended for buildings with human occupancy where rapid evacuation may be difficult (e.g. nursing homes, hospitals, etc..). • Green cells indicate that TransGas’ minimum setback recommendation of 10 meters is applicable. Unless otherwise specified a recommended minimum setback of 10 meters applies to the nearest building or structure regardless of density.

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