Supplementary Provisions
SOUND LEVELS Maximum Permitted Sound | ||
|---|---|---|
Octave Band (cycles per second) | Level Along Residential District Boundaries (decibels) | Level at Any Other Point on the Lot Boundary (decibels) |
0 to 75 | 72 | 79 |
75 to 150 | 67 | 74 |
150 to 300 | 59 | 66 |
300 to 600 | 52 | 59 |
600 to 1,200 | 46 | 53 |
1,200 to 2,400 | 40 | 47 |
2,400 to 4,800 | 34 | 41 |
Above 4,800 | 32 | 39 |
Number of Bedrooms in Unit | Minimum Square Footage Required per Unit |
|---|---|
0 (efficiency) | 400 |
1 | 500 |
2 | 600 |
Minimum Setback from Landmark to Borehole or Geothermal Supply or Return Well | |||
|---|---|---|---|
Landmark | Closed-Loop Systems | Standing-Column Well Systems | |
Delineated wetlands, floodplains, lakes, ponds, streams, or other surface waters | 12.5 feet* | 25 feet* | |
Storm drains, retention basins, stormwater stabilization ponds, or rainwater pits | 12.5 feet* | 25 feet* | |
Community spray irrigation site sewage sludge and septage disposal site | 50 feet* | 100 feet* | |
Farm silos, barnyards, manure pits or tanks or other storage areas of animal manure | 100 feet* | 200 feet* | |
Subsurface sewage absorption areas, elevated sand mounds, cesspools, sewage seepage pits, single-family spray irrigation system, etc. | 50 feet* | 100 feet* | |
Septic tanks, aerobic tanks, sewage pump tanks, holding tanks | 25 feet* | 50 feet* | |
Gravity sewer lines and drains carrying domestic sewage or industrial waste (unless item below applies) | 25 feet* | 50 feet* | |
A. | Gravity sewer lines and drains using cast-iron pipe with watertight lead-caulked or neoprene-gasketed joints, or Schedule 40 PVC pipe with solvent-welded joints | 5 feet* | 10 feet* |
B. | Sewer lines and drains carrying domestic sewage or industrial waste under pressure (except welded steel pipe or concrete-encased pipe) | 25 feet* | 50 feet* |
Commercial preparation area or storage area of hazardous spray materials, fertilizers or chemicals, salt piles | 150 feet* | 300 feet* | |
Existing water and forced sewer buried utilities and/or utility trenches | 15 feet or outside easement | ||
Dedicated public right-of-way and property lines | 10 feet | ||
Building foundations (except buildings enclosing water wells and/or water well pumps) | 10 feet | ||
Identified NPL (Superfund) site plume area | 300 feet | ||
Any other source or potential source of pollution | As approved | ||
* | These amounts are the minimum isolation distances required by Montgomery County Health Department (MCHD) Code § 17-7. Any deviation or modification from these isolation distances shall be reviewed and approved by the MCHD. |
Supplementary Provisions
SOUND LEVELS Maximum Permitted Sound | ||
|---|---|---|
Octave Band (cycles per second) | Level Along Residential District Boundaries (decibels) | Level at Any Other Point on the Lot Boundary (decibels) |
0 to 75 | 72 | 79 |
75 to 150 | 67 | 74 |
150 to 300 | 59 | 66 |
300 to 600 | 52 | 59 |
600 to 1,200 | 46 | 53 |
1,200 to 2,400 | 40 | 47 |
2,400 to 4,800 | 34 | 41 |
Above 4,800 | 32 | 39 |
Number of Bedrooms in Unit | Minimum Square Footage Required per Unit |
|---|---|
0 (efficiency) | 400 |
1 | 500 |
2 | 600 |
Minimum Setback from Landmark to Borehole or Geothermal Supply or Return Well | |||
|---|---|---|---|
Landmark | Closed-Loop Systems | Standing-Column Well Systems | |
Delineated wetlands, floodplains, lakes, ponds, streams, or other surface waters | 12.5 feet* | 25 feet* | |
Storm drains, retention basins, stormwater stabilization ponds, or rainwater pits | 12.5 feet* | 25 feet* | |
Community spray irrigation site sewage sludge and septage disposal site | 50 feet* | 100 feet* | |
Farm silos, barnyards, manure pits or tanks or other storage areas of animal manure | 100 feet* | 200 feet* | |
Subsurface sewage absorption areas, elevated sand mounds, cesspools, sewage seepage pits, single-family spray irrigation system, etc. | 50 feet* | 100 feet* | |
Septic tanks, aerobic tanks, sewage pump tanks, holding tanks | 25 feet* | 50 feet* | |
Gravity sewer lines and drains carrying domestic sewage or industrial waste (unless item below applies) | 25 feet* | 50 feet* | |
A. | Gravity sewer lines and drains using cast-iron pipe with watertight lead-caulked or neoprene-gasketed joints, or Schedule 40 PVC pipe with solvent-welded joints | 5 feet* | 10 feet* |
B. | Sewer lines and drains carrying domestic sewage or industrial waste under pressure (except welded steel pipe or concrete-encased pipe) | 25 feet* | 50 feet* |
Commercial preparation area or storage area of hazardous spray materials, fertilizers or chemicals, salt piles | 150 feet* | 300 feet* | |
Existing water and forced sewer buried utilities and/or utility trenches | 15 feet or outside easement | ||
Dedicated public right-of-way and property lines | 10 feet | ||
Building foundations (except buildings enclosing water wells and/or water well pumps) | 10 feet | ||
Identified NPL (Superfund) site plume area | 300 feet | ||
Any other source or potential source of pollution | As approved | ||
* | These amounts are the minimum isolation distances required by Montgomery County Health Department (MCHD) Code § 17-7. Any deviation or modification from these isolation distances shall be reviewed and approved by the MCHD. |