In the case of development of agricultural land, development
means: any activity that requires a state permit, any activity reviewed
by the County Agricultural Board (CAB) and the State Agricultural
Development Committee (SADC), and municipal review of any activity
not exempted by the Right to Farm Act, N.J.S.A. 4:1C-1 et seq.
|
NOTE: The definition of major development above aligns with
the definition at N.J.A.C. 7:8-1.2 and is recommended for consistency.
Alternatively, a municipality may adopt the following definition,
which is the minimum standard required. Municipalities that have already
adopted the definition at N.J.A.C. 7:8-1.2 or another definition that
goes beyond the minimum requirement should not reduce the stringency
of their definition by adopting the minimum standard.
|
"Major development" means an individual "development," as well
as multiple developments that individually or collectively result
in the disturbance of one or more acres of land since February 2,
2004.
|
"Major development" includes all developments that are part
of a common plan of development or sale (for example, phased residential
development) that collectively or individually result in the disturbance
of one or more acres of land since February 2, 2004. Projects undertaken
by any government agency that otherwise meet the definition of "major
development" but which do not require approval under the Municipal
Land Use Law, N.J.S.A. 40:55D-1 et seq., are also considered "major
development."
|
Additionally, individual municipalities may define major development
with a smaller area of disturbance, a smaller area of regulated impervious
or motor vehicle surface, or both.
|
Table 1
Green Infrastructure BMPs for Groundwater Recharge, Stormwater
Runoff Quality, and/or Stormwater Runoff Quantity
| ||||
---|---|---|---|---|
Best Management Practice
|
Stormwater Runoff Quality TSS Removal Rate
(percent)
|
Stormwater Runoff Quantity
|
Groundwater Recharge
|
Minimum Separation from Seasonal High Water Table
|
Cistern
|
0
|
Yes
|
No
|
—
|
Dry well(a)
|
0
|
No
|
Yes
|
2
|
Grass swale
|
50 or less
|
No
|
No
|
2(e)
1(f)
|
Green roof
|
0
|
Yes
|
No
|
—
|
Manufactured treatment device(a)(g)
|
50 or 80
|
No
|
No
|
Dependent upon the device
|
Pervious paving system(a)
|
80
|
Yes
|
Yes(b)
No(c)
|
2(b)
1(c)
|
Small-scale bioretention basin(a)
|
80 or 90
|
Yes
|
Yes(b)
No(c)
|
2(b)
1(c)
|
Small-scale infiltration basin(a)
|
80
|
Yes
|
Yes
|
2
|
Small-scale sand filter
|
80
|
Yes
|
Yes
|
2
|
Vegetative filter strip
|
60-80
|
No
|
No
|
—
|
Notes corresponding to annotations (a) through (g) are found below)
|
Table 2
Green Infrastructure BMPs for Stormwater Runoff Quantity
(or for Groundwater Recharge and/or Stormwater Runoff Quality
with a Waiver or Variance from N.J.A.C. 7:8-5.3)
| ||||
---|---|---|---|---|
Best Management Practice
|
Stormwater Runoff Quality TSS Removal Rate
(percent)
|
Stormwater Runoff Quality
|
Groundwater Recharge
|
Minimum Separation from Seasonal High Water Table
(feet)
|
Bioretention system
|
80 or 90
|
Yes
|
Yes(b)
No(c)
|
2(b)
1(c)
|
Infiltration basin
|
80
|
Yes
|
Yes
|
2
|
Sand filter(b)
|
80
|
Yes
|
Yes
|
2
|
Standard constructed wetland
|
90
|
Yes
|
No
|
N/A
|
Wet pond(d)
|
50-90
|
Yes
|
No
|
N/A
|
Notes corresponding to annotations (b) through (d) are found below)
|
Table 3
BMPs for Groundwater Recharge, Stormwater Runoff Quality, and/or
Stormwater Runoff Quantity only with a Waiver or Variance from N.J.A.C.
7:8-5.3
| ||||
---|---|---|---|---|
Best Management Practice
|
Stormwater Runoff Quality TSS Removal Rate
(percent)
|
Stormwater Runoff Quantity
|
Groundwater Recharge
|
Minimum Separation from Seasonal High Water Table
(feet)
|
Blue roof
|
0
|
Yes
|
No
|
N/A
|
Extended detention basin
|
40-60
|
Yes
|
No
|
1
|
Manufactured treatment device(b)
|
50 or 80
|
No
|
No
|
Dependent upon the device
|
Sand filter(c)
|
80
|
Yes
|
No
|
1
|
Subsurface gravel wetland
|
90
|
No
|
No
|
1
|
Wet pond
|
50-90
|
Yes
|
No
|
N/A
|
(Notes corresponding to annotations(b) through (d) are found on below)
|
Notes to Tables 1, 2, and 3:
| |
---|---|
(a)
|
Subject to the applicable contributory drainage area limitation
specified at § 374-O(2);
|
(b)
|
Designed to infiltrate into the subsoil;
|
(c)
|
Designed with underdrains;
|
(d)
|
Designed to maintain at least a ten-foot-wide area of native
vegetation along at least 50% of the shoreline and to include a stormwater
runoff retention component designed to capture stormwater runoff for
beneficial reuse, such as irrigation;
|
(e)
|
Designed with a slope of less than 2%;
|
(f)
|
Designed with a slope of equal to or greater than 2%;
|
(g)
|
Manufactured treatment devices that meet the definition of "green infrastructure" at § 374-2;
|
(h)
|
Manufactured treatment devices that do not meet the definition of "green infrastructure" at § 374-2.
|
Best Management Practice
|
Maximum Contributory Drainage Area
|
---|---|
Dry well
|
1 acre
|
Manufactured treatment
|
2.5 acres
|
Pervious pavement systems
|
Area of additional inflow cannot exceed three times the area
occupied by the BMP
|
Small-scale bioretention
|
2.5 acres
|
Small-scale infiltration basin
|
2.5 acres
|
Small-scale sand filter
|
2.5 acres
|
Table 4 - Water Quality Design Storm Distribution
| |||||
---|---|---|---|---|---|
Time
(Minutes)
|
Cumulative Rainfall
(Inches)
|
Time
(Minutes)
|
Cumulative Rainfall
(Inches)
|
Time
(Minutes)
|
Cumulative Rainfall
(Inches)
|
1
|
0.00166
|
41
|
0.1728
|
81
|
1.0906
|
2
|
0.00332
|
42
|
0.1796
|
82
|
1.0972
|
3
|
0.00498
|
43
|
0.1864
|
83
|
1.1038
|
4
|
0.00664
|
44
|
0.1932
|
84
|
1.1104
|
5
|
0.00830
|
45
|
0.2000
|
85
|
1.1170
|
6
|
0.00996
|
46
|
0.2117
|
86
|
1.1236
|
7
|
0.01162
|
47
|
0.2233
|
87
|
1.1302
|
8
|
0.01328
|
48
|
0.2350
|
88
|
1.1368
|
9
|
0.01494
|
49
|
0.2466
|
89
|
1.1434
|
10
|
0.01660
|
50
|
0.2583
|
90
|
1.1500
|
11
|
0.01828
|
51
|
0.2783
|
91
|
1.1550
|
12
|
0.01996
|
52
|
0.2983
|
92
|
1.1600
|
13
|
0.02164
|
53
|
0.3183
|
93
|
1.1650
|
14
|
0.02332
|
54
|
0.3383
|
94
|
1.1700
|
15
|
0.02500
|
55
|
0.3583
|
95
|
1.1750
|
16
|
0.03000
|
56
|
0.4116
|
96
|
1.1800
|
17
|
0.03500
|
57
|
0.4650
|
97
|
1.1850
|
18
|
0.04000
|
58
|
0.5183
|
98
|
1.1900
|
19
|
0.04500
|
59
|
0.5717
|
99
|
1.1950
|
20
|
0.05000
|
60
|
0.6250
|
100
|
1.2000
|
21
|
0.05500
|
61
|
0.6783
|
101
|
1.2050
|
22
|
0.06000
|
62
|
0.7317
|
102
|
1.2100
|
23
|
0.06500
|
63
|
0.7850
|
103
|
1.2150
|
24
|
0.07000
|
64
|
0.8384
|
104
|
1.2200
|
25
|
0.07500
|
65
|
0.8917
|
105
|
1.2250
|
26
|
0.08000
|
66
|
0.9117
|
106
|
1.2267
|
27
|
0.08500
|
67
|
0.9317
|
107
|
1.2284
|
28
|
0.09000
|
68
|
0.9517
|
108
|
1.2300
|
29
|
0.09500
|
69
|
0.9717
|
109
|
1.2317
|
30
|
0.10000
|
70
|
0.9917
|
110
|
1.2334
|
31
|
0.10660
|
71
|
1.0034
|
111
|
1.2351
|
32
|
0.11320
|
72
|
1.0150
|
112
|
1.2367
|
33
|
0.11980
|
73
|
1.0267
|
113
|
1.2384
|
34
|
0.12640
|
74
|
1.0383
|
114
|
1.2400
|
35
|
0.13300
|
75
|
1.0500
|
115
|
1.2417
|
36
|
0.13960
|
76
|
1.0568
|
116
|
1.2434
|
37
|
0.14620
|
77
|
1.0636
|
117
|
1.2450
|
38
|
0.15280
|
78
|
1.0704
|
118
|
1.2467
|
39
|
0.15940
|
79
|
1.0772
|
119
|
1.2483
|
40
|
0.16600
|
80
|
1.0840
|
120
|
1.2500
|
R = A + B - (A x B)/100
| ||
Where
| ||
R
|
=
|
total TSS Percent Load Removal from application of both BMPs
|
A
|
=
|
the TSS Percent Removal Rate applicable to the first BMP
|
B
|
=
|
the TSS Percent Removal Rate applicable to the second BMP
|
Table 5: Current Precipitation Adjustment Factors
| |||
---|---|---|---|
County
|
Current Precipitation Adjustment Factors
| ||
2-year Design Storm
|
10-year Design Storm
|
100-year Design Storm
| |
Atlantic
|
1.01
|
1.02
|
1.03
|
Bergen
|
1.01
|
1.03
|
1.06
|
Burlington
|
0.99
|
1.01
|
1.04
|
Camden
|
1.03
|
1.04
|
1.05
|
Cape May
|
1.03
|
1.03
|
1.04
|
Cumberland
|
1.03
|
1.03
|
1.01
|
Essex
|
1.01
|
1.03
|
1.06
|
Gloucester
|
1.05
|
1.06
|
1.06
|
Hudson
|
1.03
|
1.05
|
1.09
|
Hunterdon
|
1.02
|
1.05
|
1.13
|
Mercer
|
1.01
|
1.02
|
1.04
|
Middlesex
|
1.00
|
1.01
|
1.03
|
Monmouth
|
1.00
|
1.01
|
1.02
|
Morris
|
1.01
|
1.03
|
1.06
|
Ocean
|
1.00
|
1.01
|
1.03
|
Passaic
|
1.00
|
1.02
|
1.05
|
Salem
|
1.02
|
1.03
|
1.03
|
Somerset
|
1.00
|
1.03
|
1.09
|
Sussex
|
1.03
|
1.04
|
1.07
|
Union
|
1.01
|
1.03
|
1.06
|
Warren
|
1.02
|
1.07
|
1.15
|
Table 6: Future Precipitation Change Factors
| |||
---|---|---|---|
County
|
Future Precipitation Change Factors
| ||
2-year Design Storm
|
10-year Design Storm
|
100-year Design Storm
| |
Atlantic
|
1.22
|
1.24
|
1.39
|
Bergen
|
1.20
|
1.23
|
1.37
|
Burlington
|
1.17
|
1.18
|
1.32
|
Camden
|
1.18
|
1.22
|
1.39
|
Cape May
|
1.21
|
1.24
|
1.32
|
Cumberland
|
1.20
|
1.21
|
1.39
|
Essex
|
1.19
|
1.22
|
1.33
|
Gloucester
|
1.19
|
1.23
|
1.41
|
Hudson
|
1.19
|
1.19
|
1.22
|
Hunterdon
|
1.19
|
1.23
|
1.42
|
Mercer
|
1.16
|
1.17
|
1.36
|
Middlesex
|
1.19
|
1.21
|
1.33
|
Monmouth
|
1.19
|
1.19
|
1.26
|
Morris
|
1.23
|
1.28
|
1.46
|
Ocean
|
1.18
|
1.19
|
1.24
|
Passaic
|
1.21
|
1.27
|
1.50
|
Salem
|
1.20
|
1.23
|
1.32
|
Somerset
|
1.19
|
1.24
|
1.48
|
Sussex
|
1.24
|
1.29
|
1.50
|
Union
|
1.20
|
1.23
|
1.35
|
Warren
|
1.20
|
1.25
|
1.37
|