Compiled Reference Documents - EXE250036 (As Published) · EXE25/0036

J002910-001-L-Rev0
28 July 2025



     Footings must be founded into the inferred underlying extremely weathered sandstone, using high-
           level strip/pad footings or piers (e.g., bored piles). For preliminary design purposes, an allowable
           bearing capacity of 100 kPa (for strips/pads) or an allowable end bearing pressure of 400 kPa (for
           piles) could be adopted. Founding stratum and bearing capacity must be confirmed during
           construction by a suitably qualified geotechnical engineer.
     All footings should found such that they are not adversely affected by any adjacent excavations
           batter slopes, trenches or retaining walls that are not designed to support building loads. To
           minimise the potential for any adverse interaction effects, footings should found at least below a
           plane extending 1 m horizontally from the base of trenches/batter slopes/excavations/retaining walls,
           then rising up at 1V:1H.
     Footings must not be founded in fill materials.
     Retaining walls greater than 1 m in height should be engineer (RPEQ) designed and must include a
           global stability analysis.
     Surface water diversion drainage should be installed upslope of the proposed development, with
           subsurface drainage behind any retaining walls (including existing walls). All captured stormwater,
           including overflow from roofs and tanks, should be directed by pipes or drains away from
           foundations and to the legal point of discharge.
     Site drainage should shed water and prevent ponding. Any groundwater seepage or surface water
           flows that enter the footing excavations (prior to casting the concrete) should be immediately
           removed from the excavation and discharged at the legal point of discharge.
     Any exposed soils should be protected from erosion, through revegetation, erosion matting or hard
           surfaces.

LIMITATIONS
Your attention is drawn to the document Limitations, which is also attached to this letter report.

Please contact the undersigned should you wish to discuss any of the above matters.
Yours sincerely,
CORE CONSULTANTS PTY LTD




Scott Prince                                        Brodie Hare
BSc (Applied Geology)                               MEngSc BEng(Hons) MIEAust CPEng NER RPEQ 29565
Engineering Geologist                               Senior Geotechnical Engineer

SP/BH/sp

Attachments:       Qualitative Terminology for Use in Assessing Risk to Property, Some Guidelines for Hillside
                   Construction
                   Limitations

A.B.N. 75 603 384 050




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