Residential—Number of occupants shall be determined by the actual number of occupants, but not less than two occupants for one bedroom and one occupant for each additional bedroom.
Commercial—Number of occupants shall be determined by the International Building Code.
Residential—25 gallons per day (94.6 lpd) per occupant for showers, bathtubs and lavatories and 15 gallons per day(56.7 lpd) per occupant for clothes washers or laundry trays.
Commercial—Based on type of fixture or water use records minus the discharge of fixtures other than those discharging gray water.
TABLE 1402.3 LOCATION OF SUBSURFACE IRRIGATION SYSTEM
|ELEMENT||MINIMUM HORIZONTAL DISTANCE|
|Storage tank (feet)||Irrigation disposal field (feet)|
|Lot line adjoining private property||5||5|
|Streams and lakes||50||50|
|Public water main||10||10|
TABLE 1403.1.1 DESIGN LOADING RATE
|PERCOLATION RATE (minutes per inch)||DESIGN LOADING FACTOR (gallons per square foot per day)|
|0 to less than 10||1.2|
|10 to less than 30||0.8|
|30 to less than 45||0.72|
|45 to 60||0.4|
TABLE 1403.2 DISTRIBUTION PIPE
|Polyethylene (PE) plastic pipe||ASTM F 405|
|Polyvinyl chloride (PVC) plastic pipe||ASTM D 2729|
|Polyvinyl chloride (PVC) plastic pipe with a 3.5-inch O.D. and solid cellular core or composite wall||ASTM F 1488|