Marlborough Sounds Resource Management Plan The Plan therefore sets minimum standards for industrial and commercial zones as a precautionary means of dealing with the immediate effects of discharge to air while maintaining a primary focus on monitoring of ambient air quality. 7.2.1 Objectives and Policies Objective 1 The establishment of air quality indicators and the monitoring of the air resource, to indicate the cumulative effects of activities on ambient air quality. Policy 1.1 Adopt the following provisional indicator standards for ambient air quality: Guideline Averaging Method of Time Measurement Particulates (PM) 50m g/m 3 24 hours AS 3580.9.6-1990 10 40 mg/m 3 Annual AS 3580.9.7-1990 Sulphur Dioxide 350 m g/m 3 1 hour AS 3580.4.1-1990 120 mg/m 3 24 hours Carbon Monoxide 30 mg/m 3 1 hour AS 2695-1984 10 mg/m 3 8 hours Ozone 150 mg/m 3 1 hour AS 3580.6.1-1990 100 mg/m 3 8 hours Nitrogen Dioxide 200 m g/m 3 1 hour AS 3580.5.1-1993 100 mg/m 3 24 hours Lead 0.5-1 mg/m 3 3 month AS 2800-1985 Fluoride Special Land Use 1.8 mg/m 3 12 hours AS 3580.13.1-1993 1.5 mg/m 3 24 hours AS 3580.13.2-1991 0.8 mg/m 3 7 day 0.4 mg/m 3 30 day 0.25 m g/m 3 90 day General Land Use 3.7 mg/m 3 12 hours AS 3580.13.1-1993 2.9 mg/m 3 24 hours AS 3580.13.2-1991 1.7 mg/m 3 7 day 0.84 m g/m 3 30 day 0.5 mg/m 3 90 day Conservation Areas 0.1 mg/m 3 90 day Hydrogen Sulphide 7 mg/m 3 30 minutes AS 3580.8.1-1990 7 2