ECAN Hazardous Substances Consent Threshold Schedule
http://ecan.govt.nz/publications/Plans/nrrp-chapter-4-operative-110611.pdf

RMA Planning Tool 1
  http://www.qualityplanning.org.nz/images/documents/plan_topics/Hazardous_substances/Managing_Hazardous_Substances.pdf

RMA Planning Tool 2
  http://www.qualityplanning.org.nz/index.php/planning-tools/hazar

MAPS - Canterbury
https://propertysearch.canterburymaps.govt.nz/#/ here is the link