Supplemental Regulations
Function | Minimum Cartway Width (feet) | |
|---|---|---|
One-way traffic, no parking | 9 | |
Two-way traffic, no parking | 18 | |
One-way traffic, parallel parking on one side | 18 | |
Two-way traffic, parallel parking on one side | 27 | |
One-way traffic, parallel parking on two sides | 34 |
Type of Dwelling | Gross Lot Area (Minimum) | Net Lot Area (Minimum) | Lot Width (Minimum) | Maximum Impervious Coverage |
|---|---|---|---|---|
Single-family detached | 6,000 square feet | 5,000 square feet | 60 feet | 55% of gross lot area* |
Multifamily townhouse | 3,200 square feet [equivalent lot size] | 3,200 square feet [equivalent lot size] | 24 feet | N/A |
* | No single-family detached lot shall have more than 55% of impervious coverage, or 4,000 square feet of impervious coverage, whichever is less. |
Type of Dwelling | Front Yard | Side Yard | Rear Yard |
|---|---|---|---|
Single family detached | 20 feet** | 7.5 feet | 25 feet |
Multifamily townhouse | 20 feet | 7.5 feet** | 25 feet |
** | There shall be a minimum separation between buildings of 20 feet. |
Table 1: Data Center Noise Limits, Measurement, and Compliance Requirements | |
|---|---|
Category | Requirement |
Applicable Uses | Data centers, including all accessory mechanical equipment, generators, cooling systems, and substations |
Measurement basis | A-weighted sound levels (dBA), unless noted otherwise for low-frequency noise |
Receptor locations | Measurements and modeling shall be conducted at or beyond the nearest property line and at sensitive receptors when present |
Operating condition assumption | All compliance evaluations shall assume simultaneous operation of all generators, cooling equipment, and other noise-producing devices at maximum rated capacity |
Measurement metric | Equivalent continuous sound level (Leq. 1-hour) in dBC |
Table 2: Numeric Noise Limits by Zoning Use | ||
|---|---|---|
Receiving Land Use | Daytime (7:00 a.m.-10:00 p.m.) | Nighttime (10:00 p.m.-7:00 a.m.) |
Residential or sensitive receptor | 55 dBA Leq (1-hour) | 45 dBA Leq (I-hour) |
Mixed-use/commercial | 60 dBA Leq (1-hour) | 50 dBA Leq (1-hour) |
Industrial | 65 dBA Leq (one-hour) | 55 dBA Leq (1-hour) |
Table 3: Low-Frequency Noise Criteria | |
|---|---|
Parameter | Requirement |
Frequency sensitivity | C-weighted sound levels (dBC), capturing enhanced sensitivity to low-frequency noise |
Measurement locations | At the nearest property line and at sensitive receptors, when present |
Daytime limit (7:00 a.m.-10:00 p.m.) | 70 dBC Leq (1-hour) |
Nighttime limit (10:00 p.m.-7:00 a.m.) | 60 dBC Leq (1-hour) |
Tonal/narrowband noise | Clearly perceptible low -frequency tonal noise shall require mitigation regardless of overall dBC compliance, as determined by the qualified professional or the Township based on clearly perceptible tonal characteristics |
Applicability | Limits apply under simultaneous operation of all generators, cooling systems, and mechanical equipment |
Table 4: Modeling and Study Requirements | |
|---|---|
Requirement | Standard |
Pre-construction study | Required with conditional use application |
Post-construction verification | Required within 180 days of commencement of operations |
Prepared by | Qualified professional with demonstrated noise expertise |
Modeling methodology | ISO 9613-2, CadnaA, SoundPLAN, or equivalent accepted industry model |
Meteorological assumptions | Downwind propagation, ISO-conservative conditions |
Equipment data | Manufacturer sound power levels and octave-band spectra |
Low-frequency evaluation | Required where large generators or cooling systems are used |
Table 5: Measurement Procedures | |
|---|---|
Element | Requirement |
Instrumentation | Type 1 or Type 2 ANSI-certified sound level meter |
Calibration | Pre- and post-measurement field calibration required |
Measurement duration | Minimum 15 minutes per location unless otherwise specified. Sound level limits expressed as hourly equivalent levels (Leq. 1-hour) may be evaluated using shorter-duration measurements, including the minimum durations identified in this table, where such measurements are conducted under steady-state operating conditions and are representative of normal operations |
Operating conditions | Measurements shall include peak cooling load and generator operation under load |
Background noise | Baseline ambient levels documented prior to construction |
Table 6: Compliance | |
|---|---|
Item | Requirement |
Material increase definition | An increase of >3 dBA above baseline ambient sound level |
Violation determination | Exceedance of numeric limits or material increase |
Retesting authority | Township may require additional testing following substantiated complaints or equipment changes |