Table I
Minimum Distances for Location of Components of Private
Waste Disposal Systems Harford County
| |||||||
---|---|---|---|---|---|---|---|
Component
|
Shallow Well and Spring
(feet)
|
Drilled Well
(feet)
|
Water Supply Line
(feet)
|
Building Foundation3
(feet)
|
Property Line3
(feet)
|
Stream
(feet)
|
Swimming Pool
(feet)
|
Building sewer1
|
50
|
10
|
15
| ||||
Septic tank
|
100
|
1002
|
20
|
15
|
20
| ||
Distribu-tion box
|
100
|
1002
|
25
|
15
|
25
| ||
Sewage disposal area
|
100
|
100
|
30
|
15
|
100
|
30
|
NOTES:
| |
---|---|
1
|
Installation of the sewer line in relation to the water line
shall be in conformance with Harford County Plumbing Code.
|
2
|
For recorded lots as of November 28 1980 the distance is seventy-five
(75) feet.
|
3
|
Depending upon the topography and individual lot circumstances
the approving authority may consider minor variances.
|
4
|
For lots created prior to October 1, 1973, a waste disposal
system being installed as the result of an existing failing waste
disposal system may be installed within five feet of a property line
at the discretion of the approving authority.
|
Table II
|
---|
Capacity of Septic Tanks
Harford County
|
The minimum capacity for a two compartment septic tank serving a single-family dwelling under § 216-22.
|
Number of Bedrooms
|
Liquid Capacity of Tank Requirement
(gallons)
|
---|---|
3 or fewer
|
1,250
|
4 or 5
|
1,500
|
6
|
1,750
|
For each additional bedroom beyond six (6),
add two hundred fifty (250) gallons to the liquid capacity requirement
| |||
The minimum capacity for a two compartment septic tank serving a non residential use under § 216-22 shall be calculated according to the following criteria but shall not be less than 1,250 gallons
| |||
a
|
Flows of 1,500 gallons per day (gpd) or greater
| ||
V = 1,125 gallons + 0.75 Q
| |||
Where
|
V = minimum septic tank volume
| ||
Q = estimated daily peak sewage flow
| |||
b
|
Flows of less than 1,500 gallons per day (gpd)
| ||
V = 1.5 Q
|
Table III
|
---|
Minimum Construction Requirements
|
Harford County
|
(Part 1)
|
Construction Element
|
Minimum Requirement
| |
---|---|---|
Standard trench (shallow)
| ||
Individual lines per trench
|
2
| |
Individual line, minimum length, in feet
|
50
| |
Individual line, maximum length, in feet
|
100
| |
Individual trench width, minimum, in inches
|
18
| |
Individual trench width, maximum, in inches
|
36
| |
Individual trench depth, minimum, in inches
|
24
| |
Drain pipe, inches in diameter
|
4
| |
Drain lines, maximum slope, inches per 100 feet
|
4
| |
Minimum depth of stone under drain pipe, in
inches
|
12
| |
Minimum cover of stone over the pipe, in inches
|
2
| |
Space between trenches, minimum (on center),
in feet
|
8
| |
Distance of solid earth between trench and distribution
box, in feet
|
5
| |
Disposal trench (deep)
| ||
Individual line, minimum length, in feet
|
35
| |
Individual line, maximum length, in feet
|
100
| |
Individual trench width, minimum, in inches
|
12
| |
Individual trench width, maximum, in inches
|
24
| |
Drain pipe, inches in diameter
|
4
| |
Drain lines, maximum slope, inches per 100 feet
|
4
| |
Minimum depth of stone under drain pipe
|
As specified
| |
Minimum cover of stone over drain pipe, in inches
|
2
| |
Space between trenches, minimum (on center),
in feet
|
Per COMAR 26.04.02
| |
Distance of solid earth between trench and distribution
box, in feet
|
5
| |
Seepage pit (dry well)
| ||
Individual dry well, minimum inside diameter
|
Standard ring size
| |
Individual dry well, maximum inside block, feet
in diameter
|
10
| |
Space between dry wells, if more than 1
|
3 times diameter
| |
Distance from distribution box, minimum, in
feet
|
5
| |
Minimum outside clearance from ring sidewall
of pit, in inches
|
12
|