There are four classes of liquefaction potential for Christchurch: high, moderate, low and no or unknown liquefaction potential.
- Areas of Christchurch rated as high liquefaction potential have soil types that are the most prone to liquefaction.
- Areas rated as low liquefaction potential have soil types that are least prone to liquefaction.
- Areas of moderate liquefaction potential have soil types between the high and low classes.
- Areas rated as having no or unknown liquefaction potential generally do not have soils prone to liquefaction, or there is currently not enough soil information to determine liquefaction potential.
Additionally there are five classes of liquefaction ground damage potential for Christchurch: very high, high, moderate, low and no liquefaction ground damage potential. These give a more detailed indication of the damage to the ground that can occur during an earthquake.
The liquefaction potential and liquefaction ground damage potential ratings are only an indication of the liquefaction potential in your area based on available soil and water table information. The information is not specific to your individual property.
For further assistance please contact Customer Service on 03 353 9007 or toll free on 0800 324 636. You can also visit our website www.ecan.govt.nz
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