2016-02-02 P&O Committee - Item 3 - Attachment 4 - Mary River Environmental Values and Water Quality Objectives

Mary River environmental values and water quality objectives



                                                                                                                                     1-11
             Water area/type             Management              Water quality objectives to protect aquatic ecosystem EV
               (refer Plan              intent (level of
                WQ1381)                   protection)

            Freshwater                 Aquatic                    turbidity range: 1 – 20 NTU
            lakes/reservoirs           ecosystem –                suspended solids: n/d
                                       moderately                 median chlorophyll a: <5 µg/L
                                       disturbed                  median total nitrogen: <350 µg/L
                                                                  oxidised N: <10 µg/L
                                                                  ammonia N: <10 µg/L
                                                                  organic N: <330 µg/L
                                                                  total phosphorus: <10 µg/L
                                                                  filterable reactive phosphorus (FRP): <5 µg/L
                                                                  dissolved oxygen: 90 – 110% saturation
                                                                  pH: 6.5 – 8.0
                                                                  secchi depth: n/d


            For ALL                    All                   Toxicants in water and sediment as per AWQG (2000):
            freshwaters within                                Toxicants in water: refer to AWQG section 3.4 - ‘water quality
            this Table                                           guidelines for toxicants’ (including Tables 3.4.1, 3.4.2, and
                                                                 Figure 3.4.1)
                                                              Toxicants in sediments: refer to AWQG section 3.5 - ‘sediment
                                                                 quality guidelines’ (including Table 3.5.1, Figure 3.5.1)

                                                             Comply with Code of Practice for Antifouling and In-water Hull
                                                             Cleaning and Maintenance, ANZECC.
            Freshwater                 Aquatic               Protect or restore riparian areas. Refer section 3.1.2– riparian area
            riparian areas             ecosystem –           water quality objectives.
                                       moderately
                                       disturbed

            Ground waters              Aquatic               Where ground waters interact with surface waters, groundwater
                                       ecosystem – high      quality should not compromise identified EVs and WQOs for those
                                       ecological value      waters.

                                                             Note: the AWQG [2000] recommends that that the highest level of
                                                             protection should be provided to underground aquatic ecosystems,
                                                             given their high conservation value. Where ground waters are in
                                                                                                                                th
                                                             good condition the intent is to maintain existing water quality (20 ,
                                                                th       th
                                                             50 and 80 percentiles). There is insufficient information available
                                                             to establish current water quality for ground waters. Refer to
                                                             Appendix D in Queensland water quality guidelines for details on
                                                             how to establish a minimum water quality data set for deriving local
                                                                th   th       th
                                                             20 , 50 and 80 percentiles.
            Wetlands                   Aquatic               Objectives as per AWQG (2000) and section 3.1.2.
                                       ecosystem –
                                       moderately
                                       disturbed

            Notes:
            1.  Oxidised N = NO2 + NO3. Units for nitrogen indicators are micrograms per litre (µg/L) N.
            2.  Units for phosphorus indicators are micrograms per litre (µg/L) P.
            3.  n/d = no data, n/a = not applicable for this indicator and water type.
            4.  DO objectives apply to daytime conditions. Lower values may occur at night but these should not be more than
                10%–15% less than daytime values. DO values as low as 40% may occur in estuaries for short periods following
                material inflow events after rainfall. DO values <50% are likely to significantly impact on the ongoing ability of fish to
                persist in a waterbody. DO values <30% saturation are toxic to some fish species. These DO values should be



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Document Set ID: 20002123
Version: 1, Version Date: 21/12/2015

Mary River environmental values and water quality objectives

           Water area/type        Management          Water quality objectives to protect aquatic ecosystem EV ~
              (refer Plan        intent (level of
               WQ1381)             protection)
           Freshwater          Aquatic              =   turbidity range: 1 — 20 NTU
          lakes/reservoirs      ecosystem —         = — suspended solids: n/d
                               moderately           *    median chlorophyll a: <5 pg/L
                                disturbed           =    median total nitrogen: <350 ug/L
                                                    »    oxidised N: <10 ug/L
                                                    5	1	1	1	10	2	1061	762	169	31	14	ammonia
5	1	1	1	10	3	1246	762	36	30	88	N:
5	1	1	1	10	4	1298	763	66	30	92	<10
5	1	1	1	10	5	1380	762	79	39	55	pg/L
4	1	1	1	11	0	988	814	459	39	-1	
5	1	1	1	11	1	988	823	12	12	56	=
5	1	1	1	11	2	1020	810	24	48	37	—
5	1	1	1	11	3	1061	814	134	39	91	organic
5	1	1	1	11	4	1211	814	36	30	91	N:
5	1	1	1	11	5	1263	815	90	30	91	<330
5	1	1	1	11	6	1369	814	78	39	81	pg/L
4	1	1	1	12	0	988	865	566	39	-1	
5	1	1	1	12	1	988	874	12	12	45	=
5	1	1	1	12	2	1060	865	76	31	90	total
5	1	1	1	12	3	1152	865	225	39	93	phosphorus:
5	1	1	1	12	4	1393	866	66	30	93	<10
5	1	1	1	12	5	1475	865	79	39	65	pg/L
4	1	1	1	13	0	988	917	902	39	-1	
5	1	1	1	13	1	988	926	12	12	36	=
5	1	1	1	13	2	1015	913	24	47	2	—
5	1	1	1	13	3	1060	917	155	31	89	filterable
5	1	1	1	13	4	1231	917	142	31	96	reactive
5	1	1	1	13	5	1388	917	214	39	93	phosphorus
5	1	1	1	13	6	1619	917	117	39	92	(FRP):
5	1	1	1	13	7	1752	918	44	30	96	<5
5	1	1	1	13	8	1811	917	79	39	36	ug/L
4	1	1	1	14	0	988	969	805	39	-1	
5	1	1	1	14	1	988	969	242	31	44	dissolved

                                                                   oxygen: 90 — 110% saturation
                                                    =»   pH: 6.5-8.0
                                                    =    secchi depth: n/d

           For ALL             All                  Toxicants in water and sediment as per AWQG (2000):
          freshwaters within                        «    Toxicants in water: refer to AWQG section 3.4 - ‘water quality
          this Table                                    guidelines for toxicants’ (including Tables 3.4.1, 3.4.2, and
                                                         Figure 3.4.1)
                                                    «"   Toxicants in sediments: refer to AWQG section 3.5 - ‘sediment
                                                        quality guidelines’ (including Table 3.5.1, Figure 3.5.1)
                                                    Comply with Code of Practice for Antifouling and In-water Hull
                                                    Cleaning and Maintenance, ANZECC.
           Freshwater          Aquatic               Protect or restore riparian areas. Refer section 3.1.2— riparian area
          riparian areas        ecosystem —         water quality objectives.
                                moderately
                                disturbed

          Ground waters        Aquatic              Where ground waters interact with surface waters, groundwater
                                ecosystem — high | quality should not compromise identified EVs and WQOs for those
                                ecological value | waters.
                                                    Note: the AWQG [2000] recommends that that the highest level of
                                                    protection should be provided to underground aquatic ecosystems,
                                                    given their high conservation value. Where ground waters are in
                                                    good condition the intent is to maintain existing water quality (20",
                                                    50" and 80" percentiles). There is insufficient information available
                                                    to establish current water quality for ground waters. Refer to
                                                    Appendix D in Queensland water quality quidelines for details on
                                                    how to establish a minimum water quality data set for deriving local
                                                    20", 50" and 80" percentiles.
                            gee
         Wetlands               Aquatic             Objectives as per AWQG (2000) and section 3.1.2.
                                ecosystem —
                                moderately

           Notes:
           1.   Oxidised N = NOz + NOs. Units for nitrogen indicators are micrograms per litre (ug/L) N.
           2.   Units for phosphorus indicators are micrograms per litre (ug/L) P.
           3.   n/d =no data, n/a = not applicable for this indicator and water type.
           4.   DO objectives apply to daytime conditions. Lower values may occur at night but these should not be more than
                10%-15% less than daytime values. DO values as low as 40% may occur in estuaries for short periods following
                material inflow events after rainfall. DO values <50% are likely to significantly impact on the ongoing ability of fish to
                persist in a waterbody. DO values <30% saturation are toxic to some fish species. These DO values should be

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Document Set ID: 20002123
Version: 1, Version Date: 21/12/2015