Pennsylvania Code › Title 25 - ENVIRONMENTAL PROTECTION › Part I - Department of Environmental Protection › Subpart C - Protection of Natural Resources › Article I - Land Resources › Chapter 73 - STANDARDS FOR ONLOT SEWAGE TREATMENT FACILITIES › GENERAL SITE LOCATION AND ABSORPTION AREA REQUIREMENTS › Section 73.17 - Sewage flows

Current through Register Vol. 54, No. 28, July 13, 2024
(a) The flow
						figures in this subsection and subsection (b) are peak daily flows for the
						design of community onlot sewage systems. These flow figures are not intended
						to be used for the calculation of flows for the design of community sewerage
						systems or for the allocation of flows related to community sewerage systems.
						Design and permit sewage flows for a community sewerage system are to be
						calculated using the procedures established in the Department's "Domestic
						Wastewater Facilities Manual." The sewage flow from single family dwellings
						served by a community onlot sewage system or from apartments, rooming houses,
						hotels and motels served by an individual or community sewage system shall be
						determined from the following table:
Type of Establishment
Gallons/Unit/day
Residential
Gallons/unit
BOD/unit
Hotels and motels
100
.30
Multiple family dwellings and apartments,
								  including townhouses, duplexes and condominiums
400
1.13
Rooming houses (per unit)
200
.60
Single family residences
400*
.90
*For units of 3 bedrooms or less; for each bedroom over
						  3, add 100 gallons.
(b) The
						sewage flow, which shall exclude any industrial waste, for nonresidential
						establishments served by an individual or community sewage system shall be
						determined from the following table:
Type of Establishment Commercial
Gallons/day
BOD/day
Airline catering (per meal
								  served)
3
.03
Airports (per passenger-not including
								  food)
5
.02
Airports (per employe)
10
.06
One licensed operator Beauty
								  shops
200
-
Bus service areas not including food (per patron
								  and employe)
5
.02
Country clubs not including food (per patron and
								  employe)
30
.02
Drive-in theaters (not including food-per
								  space)
10
.06
Factories and plants exclusive of industrial
								  wastes (per employe)
35
.08
Laundries, self-service
								  (gallons/washer)
400
2.00
Mobile home parks, independent (per
								  space)
400
1.00
Movie theaters (not including food, per
								  auditorium seat)
5
.03
Offices (per employe)
10
.06
Restaurants (toilet and kitchen wastes per
								  patron)
10
.06
(Additional for bars and cocktail
								  lounges)
2
.02
Restaurants (kitchen and toilet wastes,
								  single-service utensils/person)
8.5
.03
Restaurants (kitchen waste only, single-service
								  utensils/patron)
3
.01
Stores (per public
								  toilet)
400
2.00
Warehouses (per
								  employe)
35
-
Work or construction camps (semipermanent) with
								  flush toilets (per employe)
50
.17
Work or construction camps (semipermanent)
								  without flush toilets (per employe)
35
.02
Institutional
Churches (per seat)
3
-
Churches (additional kitchen waste per meal
								  served)
3
-
Churches (additional with paper service per meal
								  served)
1.5
-
Hospitals (per bed space, with
								  laundry)
300
.20
Hospitals (per bed space, without
								  laundry)
220
-
Institutional food service (per
								  meal)
20
-
Institutions other than hospitals (per bed
								  space)
125
.17
Schools, boarding (per resident)
100
.17
Schools, day (without cafeterias, gyms or showers
								  per student and employe)
15
.04
Schools, day (with cafeterias, but no gym or
								  showers per student and employe)
20
.08
Schools, day (with cafeterias, gym and showers
								  per student and employe)
25
.10
Recreational and Seasonal
Camps, day (no meals
								  served)
10
.12
Camps, hunting and summer residential (night and
								  day) with limited plumbing including water-carried toilet wastes (per person)
50
.12
Campgrounds, with individual sewer and water
								  hookup (per space)
100
.50
Campgrounds with water hookup only and/or central
								  comfort station which includes water-carried toilet wastes (per
								  space)
50
.50
Fairgrounds and parks, picnic-with bathhouses,
								  showers, and flush toilets (per person)
15
.06
Fairgrounds and parks, picnic (toilet wastes
								  only, per person)
5
.06
Swimming pools and bathhouses (per person)
10
.06
(c) Actual water meter or sewer meter flow
						data indicating peak daily flows different than those shown in this section
						over a 1-year period for a similar nonresidential establishment may be accepted
						for use in sizing the onlot disposal system. If average daily flows are used,
						the peak daily flow shall be calculated by multiplying the average daily flow
						by two.
(d) Establishments with
						food preparation facilities are required to install adequately designed
						pretreatment units and traps to reduce greases and biological oxygen demand
						(BOD) prior to discharge to an individual or community sewage system.
The provisions of this §
														73.17 amended under section 9 of
							 the Pennsylvania Sewage Facilities Act (35 P. S. §
															750.9); The Clean Streams Law (35 P. S.
							 §§
															691.1-691.1001); and section
							 1920-A of The Administrative Code of 1929 (71 P. S. §
															510-20).
This section cited in 25 Pa. Code §
														71.52 (relating to content
							 requirements-new land development revisions); 25 Pa. Code §
														72.22 (relating to permit
							 issuance); 25 Pa. Code §
														73.16 (relating to absorption area
							 requirement); 25 Pa. Code §
														73.31 (relating to standards for
							 septic tanks); 25 Pa. Code §
														73.32 (relating to standards for
							 aerobic treatment tanks); and 25 Pa. Code §
														73.161 (relating to
							 general).