Tharwa SandsYour local supplier of Red Granite to Canberra, Sydney and the Southern Highlands
Skip to content

Product Gradings

Download the current testing certificates for our products from the hyperlink

USGA Washed River Sand grading

PI

USGA

PH

Hydraulic Conductivity

Thermal Sand grading

PSD

Thermal Resistivity 

PH

Ginninderra Red Granite grading

PSD -15mm gravel 

PSD – 30mm gravel

PH

Wearing course specification can be found here

Chemwatch safety testing sheet can be found here

Blended Sandy Topsoil grading

PSD & PI

Nitrate & Amonia

PH

Recycled Sub Base grading

CBR