Appendix D - On-site domestic wastewater evaluation report · MCU25/0022

NORTH COAST GEOMECHANICAL CONSULTANTS
  CONSULTING ENGINEERS                                                                 1/36 Maud Street
 K.N. CROCKER, Dip. C.E. MIE.Aust                                     MAROOCHYDORE QLD 4558
               CPEng. No. 86019                                                     Phone 07 5443 2988
               RPEQ No. 638                                                           Fax 07 5443 5157
              LGEQ No. 544                                          Email: [email protected]

                                DESKTOP ANALYSIS
RESIDENCE AT 193 SANKEYS ROAD, FEDERAL
Lot. 6 RP216727
SOIL PERMEABILITY/SOIL CONDUCTIVITY TEST CALCULATION
AS/NZS 1547:2012
Q = RATE OF LOSS OF WATER FROM RESERVOIR (m³/min)
H = DEPTH OF WATER IN TEST HOLE (cm) r = RADIUS OF TEST HOLE (cm)
Ksat = SATURATED HYDRAULIC CONDUCTIVITY OF SOIL IN m/day
HYDRAULIC LOADING FOR 4-BEDROOM RESIDENCE.
     6    EQ. PERSONS         @          120     L/day/person =  720 L / Day
                                                                5040 L / Week
Based on AS1547, Table H1, On-Site Roof Water Supply
Ksat = 4.4Q[0.5 sinh-1(H/2r)-√{(r/H²)+0.25}+r/H]
                         2πH²
 TEST       FALL       Q               H                 R            Ksat       SOIL
                                                                                        STRUCTURE
 HOLE     (mm/5min) (cm³/min)        (cm)              (cm)          (m/day)   CATEGORY
    1        2.10       7.422         25                    5         0.062         5        Massive
    2        2.10       7.422         25                    5         0.062         5        Massive
    3        2.10       7.422         25                    5         0.062         5        Massive




SUMMARY OF PERCOLATION TEST HOLES
In Accordance with A.S.1547:2012 "On-Site Domestic Wastewater Management
                                                  IRRIGATION
                      PRIMARY SECONDARY SECONDARY
TEST RESULTS
                      TREATED  TREATED   TREATED
                                                     mm/day
 HOLE        Ksat.       DLR         DLR               DIR
   1         0.06        n.a.         5                 3
   2         0.06        n.a.         5                 3
   3         0.06        n.a.         5                 3

                                   Minimum
                                Area Required:                  240 metres2


DLR = DESIGN LOAD RATE FROM TABLE 5.2 AS1547:2012
in mm/day, based on SECONDARY TREATED EFFLUENT.
DIR = DESIGN IRRIGATION RATE FROM TABLE M1 AS1547:2012 in mm/day.
SECONDARY TREATED EFFLUENT ONLY PERMITTED.
TRENCH LENGTH = N/A
SOIL CAT. = SOIL CATEGORY DETERMINED FROM BORELOGS
(REFER TABLE 5.1 AS1547:2012)
N.R. = NOT RECOMMENDED


8894-193 SANKEYS RD-FEDERAL                 Page 11 of 13                                  24/07/2023