TABLE 2 - SEWAGE FLOWS ACCORDING TO TYPE OF EXTABLISHMENT

TABLE 3 - DRAINAGE FIXTURE UNIT VALUES FOR VARIOUS PLUMBING FIXTURES

TABLE 4 - CAPACITY OF SEPTIC TANKS

1. Septic tank sizes in this table include sludge storage capacity and the connection of domestic food waste disposal units without further volume increase.

2. Extra Bedroom, 150 gallons each.

3. Extra dwelling units over 10, 250 gallons each.

4. Extra fixture units over 100, 25 gallons per fixture unit.

RECOMMENDED DESIGN CRITERIA - Sewage disposal systems sized using the estimated waste/sewage flow rates should be calculated as follows:

(1) Waste/sewage flow, up to 1500 gal day
Flow x 1.5 = septic tank size

(2) Waste/sewage flow, over 1500 gal/day
Flow x 0.75 + 1125 = septic tank size

TABLE 5 - PRETREATMENT UNIT SIZING

Retention Times -
Commercial kitchen waste:
Dishwasher and/or disposal …………………………………… 2.5 hours
Single service kitchen:
Single serving with disposal …………………………………… 1.5 hours
Lint-silt (laundry) …………………………………………...…     2.0 hours

Storage Factors -
Fully equipped ……………………………………………. 8 hr. operation: 1
                                                                                         16 hr. operation: 2
Commercial kitchen ………………………………………… 24 hr. operation: 3
Single service kitchen ……………………………………............………….. 1.5
Auto washers ……………………………………………………. Self-serve: 1.5
                                                                                       Employee operated: 2
Laundries, Laundromats ………………………………… 1.5 (allows for rock filter)