Marine Produce Australia: Cone Bay Barramundi Aquaculture ...

Marine Produce Australia: Cone Bay Barramundi Aquaculture ... Marine Produce Australia: Cone Bay Barramundi Aquaculture ...

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Table 4.5 EQG for sediments EQG Indicator Sediment TKN TP TOC (LOI) Redox discontinuity Zone of Ecological Protection Moderate High Maximum (i) Median nutrient concentration calculated from pooled sites, on each sampling occasion, must be less than the 95%ile or 80%ile of Reference Site data*, or (ii) Median nutrient concentration at any site over a four month period must be less than the 95%ile or 80%ile of Reference Site data* (i) Median concentration of TOC calculated from pooled sites, on each sampling occasion, must be less than the 95%ile or 80%ile of Reference Site data*, or (ii) Median concentration of TOC at any site over a four month period must be less than the 95%ile or 80%ile of Reference Site data* (i) Median depth of redox discont. layer calculated from pooled sites, on each sampling occasion, must be no less than the 5%ile or 20%ile of Reference Site data*, or (ii) Median depth of redox discont. layer at any site over a four month must be no less than the 5%ile or 20%ile of Reference Site data* (i) Median nutrient concentration, calculated from pooled sites, on each sampling occasion must be less than the 80%ile of Reference Site data, or (ii) Median nutrient concentration at any site over a four month period must be less than the 80%ile of Reference Site data (i) Median concentration of TOC, calculated from pooled sites, on each sampling occasion must be less than the 80%ile of Reference Site data, or (ii) Median concentration of TOC at any site over a four month period must be less than the 80%ile of Reference Site data (i) Median depth of redox discont. layer calculated from pooled sites, on each sampling occasion, must be no less than the 20%ile of Reference Site data, or (ii) Median depth of redox discont. layer at any site over a four month must be no less than the 20%ile of Reference Site data (i) Median nutrient concentration, calculated from pooled sites, on each sampling occasion must be less than the 70%ile of Reference Site data, or (ii) Median nutrient concentration at any site over a four month period must be less than the 80%ile of Reference Site data (i) Median concentration of TOC, calculated from pooled sites, on each sampling occasion must be less than the 70%ile of Reference Site data, or (ii) Median concentration of TOC at any site over a four month period must be less than the 70%ile of Reference Site data (i) Median depth of redox discont. layer calculated from pooled sites, on each sampling occasion, must be no less than the 30%ile of Reference Site data, or (ii) Median depth of redox discont. layer at any site over a four month must be no less than the 20%ile of Reference Site data Notes: * The actual percentile used will depend on the positioning of sea-cages relative to the MEPA/HEPA boundary (see text in Section 5.1) 24 Oceanica: Marine Produce Australia: Cone Bay Barramundi Aquaculture, Environmental Monitoring & Management Plan

Environmental Quality Standards The EQS for sediment nutrients are outlined in Table 4.6. Table 4.6 EQS for sediments EQS Indicator Sediments TKN TP TOC (LOI) Redox discontinuity Moderate Zone of Ecological Protection High Maximum If EQG (i) and/or (ii) is exceeded and the exceedance is based on the moderate protection guideline (95%): (i) Evaluation of images taken beneath and within 10 m of the sea-cages must not indicate presence of white bacterial matts, black sediments, bubbles of hydrogen sulphide or a significant reduction in the presence of animal tracks, or bioturbator burrows, relative to Reference Sites, or (ii) Sediment infauna community species richness, based on the Inverse Simpson Index, not to be five times less than background (indicative of moderate impact), or (iii) Median bottom water DO on each sampling occasion must be greater than 60% saturation and not the result of a regional event as indicated by similar reductions in DO at the Reference Sites, or (iv) Median bottom water DO at any site over a four month period must be greater than 60% saturation If EQG (i) and/or (ii) is exceeded and the exceedance is based on the high protection guideline (80%ile): Proceed to EQS for high and maximum protection If EQG (i) and/or (ii) is exceeded and the exceedance is based on the moderate protection guideline (95%): (i) Evaluation of images taken beneath and within 10 m of the sea-cages must not indicate presence of white bacterial matts, black sediments, bubbles of hydrogen sulphide or a significant reduction in the presence of animal tracks, or bioturbator burrows, relative to Reference Sites, or (ii) Sediment infauna community species richness, based on the Inverse Simpson Index, not to be five times less than background (indicative of moderate impact), or (iii) Median bottom water DO on each sampling occasion must be greater than 60% saturation and not the result of a regional event as indicated by similar reductions in DO at the Reference Sites, or (iv) Median bottom water DO at any site over a four month period must be greater than 60% saturation If EQG (i) and/or (ii) is exceeded and the exceedance is based on the high protection guideline (80%ile): Proceed to EQS for high and maximum protection (i) Sediment infauna community species richness, based on the Inverse Simpson Index, not to be less than half that of background (indicative of minor impact), or (ii) Median bottom water DO on each sampling occasion must be greater than 60% saturation and not the result of a regional event as indicated by similar reductions in DO at the Reference Sites, or (iii) Median bottom water DO at any site over a four month period must be greater than 60% saturation (i) Sediment infauna community species richness, based on the Inverse Simpson Index, not to be less than half that of background (indicative of minor impact), or (ii) Median bottom water DO on each sampling occasion must be greater than 60% saturation and not the result of a regional event as indicated by similar reductions in DO at the Reference Sites; or, (iii) Median bottom water DO at any site over a four month period must be greater than 60% saturation Oceanica: Marine Produce Australia: Cone Bay Barramundi Aquaculture, Environmental Monitoring & Management Plan 25

Table 4.5 EQG for sediments<br />

EQG Indicator<br />

Sediment<br />

TKN<br />

TP<br />

TOC (LOI)<br />

Redox<br />

discontinuity<br />

Zone of Ecological Protection<br />

Moderate High Maximum<br />

(i) Median nutrient<br />

concentration calculated<br />

from pooled sites, on<br />

each sampling occasion,<br />

must be less than the<br />

95%ile or 80%ile of<br />

Reference Site data*, or<br />

(ii) Median nutrient<br />

concentration at any site<br />

over a four month period<br />

must be less than the<br />

95%ile or 80%ile of<br />

Reference Site data*<br />

(i) Median concentration<br />

of TOC calculated from<br />

pooled sites, on each<br />

sampling occasion, must<br />

be less than the 95%ile<br />

or 80%ile of Reference<br />

Site data*, or<br />

(ii) Median concentration<br />

of TOC at any site over a<br />

four month period must<br />

be less than the 95%ile<br />

or 80%ile of Reference<br />

Site data*<br />

(i) Median depth of redox<br />

discont. layer calculated<br />

from pooled sites, on<br />

each sampling occasion,<br />

must be no less than the<br />

5%ile or 20%ile of<br />

Reference Site data*, or<br />

(ii) Median depth of<br />

redox discont. layer at<br />

any site over a four<br />

month must be no less<br />

than the 5%ile or 20%ile<br />

of Reference Site data*<br />

(i) Median nutrient<br />

concentration, calculated<br />

from pooled sites, on<br />

each sampling occasion<br />

must be less than the<br />

80%ile of Reference Site<br />

data, or<br />

(ii) Median nutrient<br />

concentration at any site<br />

over a four month period<br />

must be less than the<br />

80%ile of Reference Site<br />

data<br />

(i) Median concentration<br />

of TOC, calculated from<br />

pooled sites, on each<br />

sampling occasion must<br />

be less than the 80%ile<br />

of Reference Site data, or<br />

(ii) Median concentration<br />

of TOC at any site over a<br />

four month period must<br />

be less than the 80%ile<br />

of Reference Site data<br />

(i) Median depth of redox<br />

discont. layer calculated<br />

from pooled sites, on<br />

each sampling occasion,<br />

must be no less than the<br />

20%ile of Reference Site<br />

data, or<br />

(ii) Median depth of<br />

redox discont. layer at<br />

any site over a four<br />

month must be no less<br />

than the 20%ile of<br />

Reference Site data<br />

(i) Median nutrient<br />

concentration, calculated<br />

from pooled sites, on<br />

each sampling occasion<br />

must be less than the<br />

70%ile of Reference Site<br />

data, or<br />

(ii) Median nutrient<br />

concentration at any site<br />

over a four month period<br />

must be less than the<br />

80%ile of Reference Site<br />

data<br />

(i) Median concentration<br />

of TOC, calculated from<br />

pooled sites, on each<br />

sampling occasion must<br />

be less than the 70%ile<br />

of Reference Site data, or<br />

(ii) Median concentration<br />

of TOC at any site over a<br />

four month period must<br />

be less than the 70%ile<br />

of Reference Site data<br />

(i) Median depth of redox<br />

discont. layer calculated<br />

from pooled sites, on<br />

each sampling occasion,<br />

must be no less than the<br />

30%ile of Reference Site<br />

data, or<br />

(ii) Median depth of<br />

redox discont. layer at<br />

any site over a four<br />

month must be no less<br />

than the 20%ile of<br />

Reference Site data<br />

Notes:<br />

* The actual percentile used will depend on the positioning of sea-cages relative to the MEPA/HEPA boundary (see<br />

text in Section 5.1)<br />

24 Oceanica: <strong>Marine</strong> <strong>Produce</strong> <strong>Australia</strong>: <strong>Cone</strong> <strong>Bay</strong> <strong>Barramundi</strong> <strong>Aquaculture</strong>, Environmental Monitoring & Management Plan

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