Australian Capital Territory Current Regulations

ENVIRONMENT PROTECTION REGULATION 2005 - SCHEDULE 4

Schedule 4     Ambient environmental standards

(see s 43)

Part 4.1     Domestic water supply—fully treated (TAP)

Table 4.1.1     Group A—microbiological quality

column 1 item	column 2 indicator	column 3 standard
1	E. coli	0 cfu per 100 mL for 98% of samples

Table 4.1.2     Group B—physical quality

column 1 item	column 2 indicator	column 3 standard
1	acidity (pH)	6.5-8.5
2	colour (HU)	15
3	dissolved oxygen	>85%
4	hardness	200 mg/L
5	taste and odour	acceptable to most people
6	total dissolved solids	500 mg/L
7	turbidity (NTU)	5

Table 4.1.3     Group C—inorganic chemicals

column 1 item	column 2 indicator	column 3 standard (mg/L)
1	aluminium (acid soluble)	0.2
2	ammonia (as NH 4 )	0.5
3	antimony	0.003
4	arsenic	0.007
5	barium	0.7
6	boron	0.3
7	cadmium	0.002
8	chloride	250
9	chromium (as Cr(6))	0.05
10	copper	1
11	cyanide	0.07
12	fluoride	1.5
13	hydrogen sulfide	0.05
14	iodide	0.1
15	iron	0.3
16	lead	0.01
17	manganese	0.1
18	mercury	0.001
19	molybdenum	0.05
20	nickel	0.02
21	nitrate (as nitrate)	50
22	nitrite (as nitrite)	3
23	selenium	0.01
24	silver	0.02
25	sodium	180
26	sulfate	250
27	zinc	3

Table 4.1.4     Group D—organic compounds

column 1 item	column 2 indicator	column 3 standard (mg/L)
1	acrylamide	0.0002
2	benzene	0.001
3	carbon tetrachloride	0.003
4	chlorobenzene	0.01
5	dichlorobenzenes—
5.1	1,2-dichlorobenzene	0.001
5.2	1,3-dichlorobenzene	0.02
5.3	1,4-dichlorobenzene	0.0003
6	dichloroethanes—
6.1	1,2-dichloroethane	0.003
7	dichloroethenes—
7.1	1,1-dichloroethene	0.03
7.2	1,2-dichloroethene	0.06
8	dichloromethane (methylene chloride)	0.02
9	ethylbenzene	0.003
10	ethylenediamine tetracetic acid (EDTA)	0.25
11	hexachlorobutadiene	0.0007
12	nitrilotriacetic acid	0.2
13	organotins—
13.1	tributyltin oxide	0.001
14	plasticisers—
14.1	di (2-ethylhexyl) phthalate	0.01
14.2	polycyclic aromatic hydrocarbons (PAHs)	0.00001
14.3	styrene (vinylbenzene)	0.004
14.4	tetrachloroethene	0.05
14.5	toluene	0.025
14.6	trichlorobenzenes (total)	0.005
14.7	vinyl chloride	0.0003
14.8	xylene	0.02

Table 4.1.5     Group E—disinfection by-products

column 1 item	column 2 indicator	column 3 standard (mg/L)
1	chloramine (see mono-chloramine)
2	chlorine (free)	0.6
3	chlorine dioxide	0.4
4	chlorite	0.3
5	chloroacetic acids—
5.1	chloroacetic acid	1
5.2	dichloroacetic acid	0.05
5.3	trichloroacetic acid	0.1
6	chlorophenols—
6.1	2-chlorophenol	0.0001
6.2	2,4-dichlorophenol	0.0003
6.3	2,4,6-dichlorophenol	0.002
7	cyanogen chloride (as cyanide)	0.07
8	formaldehyde	0.5
9	mono-chloramine	0.5
10	trichloroacetaldehyde (chloral hydrate)	0.02
11	trihalomethanes (THMs) (total)	0.25

Table 4.1.6     Group F—pesticides

column 1 item	column 2 indicator	column 3 standard (mg/L)
1	acephate	0.01
2	aldicarb	0.001
3	aldrin	0.0003
4	ametryn	0.05
5	amitrole	0.01
6	asulam	0.05
7	atrazine	0.02
8	azinphos-methyl	0.003
9	benomyl	0.1
10	bentazone	0.03
11	bioresmethrin	0.1
12	bromacil	0.3
13	bromophos-ethyl	0.01
14	bromoxynil	0.03
15	carbaryl	0.03
16	carbendazim	0.1
17	carbofuran	0.01
18	carbophenthion	0.0005
19	carboxin	0.3
20	chlordane	0.001
21	chlorothalonil	0.03
22	chloroxuron	0.01
23	chlorphenvinphos	0.005
24	chlorpyrifos	0.01
25	chlorsulfuron	0.1
26	cichlorvos	0.001
27	clopyralid	1
28	2,4-D	0.03
29	DDT	0.02
30	diazinon	0.003
31	dicamba	0.1
32	dichlobenil	0.01
33	diclofop-methyl	0.005
34	dicofol	0.003
35	dieldrin	0.0003
36	difenzoquat	0.1
37	dimethoate	0.05
38	diphenamid	0.3
39	diquat	0.005
40	disulfoton	0.003
41	diuron	0.03
42	DPA (2,2-DPA)	0.5
43	EDB	0.001
44	endosulfan	0.03
45	endothal	0.1
46	EPTC	0.03
47	ethion	0.003
48	ethoprophos	0.001
49	etridiazole	0.1
50	fenamiphos	0.0003
51	fenarimol	0.03
52	fenchlorphos	0.03
53	fenitrothion	0.01
54	fenoprop	0.01
55	fensulfothion	0.01
56	fenvalerate	0.05
57	flamprop-methyl	0.003
58	fluometuron	0.05
59	formothion	0.05
60	fosamine ammonium	0.03
61	glyphosphate	1
62	heptachlor (including its epoxide)	0.0003
63	hexaflurate	0.03
64	hexazinone	0.3
65	lindane	0.02
66	maldison	0.05
67	methidathion	0.03
68	methiocarb	0.005
69	methomyl	0.03
70	methoxychlor	0.3
71	metolachlor	0.3
72	metribuzin	0.05
73	metsulfuron-methyl	0.03
74	mevinphos	0.005
75	molinate	0.005
76	monocrotophos	0.001
77	napropamide	1
78	nitralin	0.5
79	norflurazon	0.05
80	oryzalin	0.3
81	oxamyl	0.1
82	paraquat	0.03
83	parathion	0.01
84	parathion methyl	0.1
85	pebulate	0.03
86	pendimethalin	0.3
87	pentachlorophenol	0.01
88	permethrin	0.1
89	picloram	0.3
90	piperonyl butoxide	0.1
91	pirimcarb	0.005
92	pirimiphos-ethyl	0.0005
93	pirimiphos-methyl	0.05
94	profenofos	0.0003
95	promecarb	0.03
96	propachlor	0.05
97	propanil	0.5
98	propargite	0.05
99	propiconazole	0.1
100	propozine	0.05
101	propyzamide	0.3
102	pyrazophos	0.03
103	quintozene	0.03
104	silvex (see fenoprop)
105	simazine	0.02
106	sulprofos	0.01
107	2,4,5-T	0.1
108	temephos	0.3
109	terbacil	0.03
110	terbufos	0.0005
111	terbutryn	0.3
112	tetrachlorvinphos	0.1
113	thiobencarb	0.03
114	thiometon	0.003
115	thiophenate	0.005
116	thiram	0.003
117	triadimefon	0.1
118	trichlorfon	0.005
119	trichlorpyr	0.01
120	trifluralin	0.05
121	vernolate	0.03

Part 4.2     Domestic water supply (DOM1/2/3)

4.1     Ambient environmental standards to which table 4.2 applies

Unless otherwise provided by table 4.2, the ambient environmental standards in relation to water quality for a waterway to which the table applies are the same as the standards stated in the tables in part 4.1.

Table 4.2     Domestic water supply

column 1 item	column 2 indicator	column 3 standard DOM1	column 4 standard DOM2	column 5 standard DOM3
1	dissolved oxygen	6 mg/L or 75% saturation, whichever is highest	6 mg/L or 75% saturation, whichever is highest	5 mg/L or 60% saturation, whichever is highest
2	E. coli	10 cfu per 100 mL for 98% of samples	100 cfu per 100 mL for 98% of samples	100 cfu per 100 mL for 98% of samples
3	turbidity (NTU)	5	250	10,000

Part 4.3     Water-based recreation—swimming (REC/1) or boating (REC/2)

Table 4.3.1     Microbiology

column 1 item	column 2 indicator	column 3 standard
1	cyanobacteria	≤5 000 cells/mL (absence of scums)
2	pathogenic free-living protozoans	0 organisms/100mL

Table 4.3.2     Chemistry

column 1 item	column 2 indicator	column 3 standard
1	acidity	pH 6.5-8.5
2	chlorophyll a	≤10μg/L
3	nitrogen to phosphorus ratio	≥12:1
4	phosphorus (total)	≤100μg/L

Table 4.3.3     Aesthetics

column 1 item	column 2 indicator	column 3 standard
1	clarity	≥Secchi depth 1.2 m
2	colour	not objectionable
3	odour	not objectionable
4	oil and grease	not visible

Table 4.3.4     Nuisance

column 1 item	column 2 indicator	column 3 standard
1	aquatic macrophytes (floating)	not objectionable
2	aquatic macrophytes (rooted)	not objectionable
3	flow rates	<1.5m/s

Part 4.4     Waterscape (VIEW)

Table 4.4.1     Microbiology

column 1 item	column 2 indicator	column 3 standard
1	cyanobacteria	≤5 000 cells/mL (absence of scums)

Table 4.4.2     Chemistry

column 1 item	column 2 indicator	column 3 standard
1	chlorophyll a	≤10μg/L
2	nitrogen to phosphorus ratio	≥12:1
3	phosphorus (total)	≤100μg/L

Table 4.4.3     Aesthetics

column 1 item	column 2 indicator	column 3 standard
1	colour	not objectionable
2	oil and grease	not visible

Table 4.4.4     Nuisance

column 1 item	column 2 indicator	column 3 standard
1	algal growth	not objectionable
2	aquatic macrophytes (floating)	not objectionable
3	aquatic macrophytes (rooted)	not objectionable

Part 4.5     Stock water supply (STOCK)

Table 4.5.1     Microbiology

column 1 item	column 2 indicator	column 3 standard
1	algae	<10 000 cells/mL

Table 4.5.2     Chemistry—general

column 1 item	column 2 indicator	column 3 standard
1	acidity	pH 6.5-9.2
2	chlorophyll a	≤0.01mg/L
3	dissolved oxygen	≥5mg/L or 60 % saturation
4	total dissolved solids	≤3 000mg/L

Table 4.5.3     Chemistry—inorganic chemicals

column 1 item	column 2 indicator	column 3 standard
1	aluminium	≤5mg/L
2	arsenic	≤0.2mg/L
3	barium	≤5mg/L
4	beryllium	≤0.1mg/L
5	boron	≤5mg/L
6	cadmium	≤0.01mg/L
7	calcium	≤1 000mg/L
8	chloride	≤2 400mg/L
9	chromium	≤1mg/L
10	cobalt	≤1mg/L
11	copper	≤0.5mg/L
12	fluoride	≤2mg/L
13	iron	≤50mg/L
14	lead	≤0.1mg/L
15	mercury	≤0.002mg/L
16	molybdenum	≤0.01mg/L
17	nickel	≤1mg/L
18	nitrate-N	≤30mg/L
19	nitrite-N	≤10mg/L
20	selenium	≤0.02mg/L
21	sulfate	≤1 000mg/L
22	vanadium	≤0.1mg/L
23	zinc	≤20mg/L

Table 4.5.4     Chemistry—organic chemicals

column 1 item	column 2 indicator	column 3 standard
1	atrazine	≤0.02mg/L
2	glyphosate	≤2mg/L
3	metolachlor	≤0.5mg/L
4	simazine	≤0.02mg/L

Part 4.6     Irrigation water supply (IRRIG)

4.2     Faecal coliforms—IRRIG

    (1)     For the indicator faecal coliforms in the table—

        (a)     the median must be 1 000cfu/100mL or less for at least 5 samples taken at regular intervals within 1 month; and

        (b)     no more than 20% of the samples may contain more than 4 000cfu/100mL.

    (2)     In this section:

"cfu", for faecal coliforms, means colony forming units.

4.3     Sodium absorption ratio

    (1)     The sodium absorption rate ( SAR ) is calculated using the following formula:

    (2)     In this formula, concentrations of Na ⁺ , Ca ²⁺ and Mg ²⁺ are expressed in milli equivalents/L.

Table 4.6.1     Microbiology

column 1 item	column 2 indicator	column 3 standard
1	faecal coliforms	≤1 000/100mL

Table 4.6.2     Chemistry—general

column 1 item	column 2 indicator	column 3 standard
1	acidity	pH 4.5-9.0
2	sodium absorption ratio	≤10mg/L
3	total dissolved solids	≤500mg/L

Table 4.6.3     Chemistry—inorganic chemicals

column 1 item	column 2 indicator	column 3 standard
1	aluminium	≤5mg/L
2	arsenic	≤0.1mg/L
3	beryllium	≤0.1mg/L
4	boron	≤6.0mg/L
5	cadmium	≤0.01mg/L
6	chloride	≤700mg/L
7	chromium	≤0.1mg/L
8	copper	≤1.0mg/L
9	fluoride	≤1.0mg/L
10	iron	≤1.0mg/L
11	lead	≤0.2mg/L
12	lithium	≤2.5mg/L
13	manganese	≤0.2mg/L
14	mercury	≤0.002mg/L
15	molybdenum	≤0.01mg/L
16	nickel	≤0.2mg/L
17	selenium	≤0.02mg/L
18	sodium	115-460mg/L
19	uranium	≤0.01mg/L
20	vanadium	≤0.1mg/L
21	zinc—
21.1	soil pH≤6.5	≤1mg/L
21.2	soil pH>6.5	≤5mg/L

Table 4.6.4     Chemistry—organic chemicals

column 1 item	column 2 indicator	column 3 standard
1	atrazine	≤0.02μg/L
2	chlordane	≤2μg/L
3	dieldrin	≤0.5μg/L
4	heptachlor	≤2μg/L
5	metolachlor	≤0.5μg/L
6	simazine	≤0.02μg/L

Part 4.7     Aquatic habitat—mountain streams (AQUA/1), lowland streams (AQUA/2), urban lakes & ponds (AQUA/3), urban drains and streams (AQUA/4), urban wetland (AQUA/5), mountain reservoirs (AQUA/6)

4.4     Acidity

For the indicator acidity (see table 4.7.2, item 1)—

        (a)     the acidity must not be more than 2 standard deviations from the long-term mean for the relevant month; and

        (b)     total alkalinity must not be less than 25% of the long-term mean for the relevant month.

4.5     Colour and turbidity

The combined effects of the indicators colour and turbidity must not reduce the depth of the compensation point for photosynthesis by more than 10% of the long-term mean for the relevant month.

4.6     Total dissolved solids

The value for the indicator total dissolved solids must not be more than 2 standard deviations from the long-term mean for the relevant month.

4.7     Ammonia levels

The ammonia level for discharge of wastewater must be based on the highest pH and highest ambient temperature likely to happen during the year.

Note     The indicator ammonia is dealt with in table 4.7.8.

Table 4.7.1     Indicators other than ammonia
microbiology

column 1 item	column 2 indicator	column 3 standard
1	cyanobacteria	≤5 000 cells/mL (absence of scums)

Table 4.7.2     Indicators other than ammonia
chemistry—general

column 1 item	column 2 indicator	column 3 standard
1	acidity—
1.1	AQUA/1, 2 and 6	pH 6.5-9
1.2	AQUA/3, 4 and 5	pH 6-9
2	chlorophyll a —
2.1	AQUA/1, 3 and 5	≤10μg/L
2.2	AQUA/6	≤2μg/L
3	dissolved oxygen—
3.1	AQUA/1, 4 and 6	≥6mg/L
3.2	AQUA/2, 3 and 5	≥4mg/L
4	nitrogen to phosphorus ratio	≥12:1
5	phosphorus (total)—
5.1	AQUA/1 and 6	≤40μg/L
5.2	AQUA/2, 3, 4 and 5	≤100μg/L
6	suspended solids—
6.1	AQUA/1 and 6	≤12.5mg/L
6.2	AQUA/2, 3, 4 and 5	≤25mg/L
7	turbidity—
7.1	AQUA/1, 2, 4 and 6	<10 nephelometric turbidity units
7.2	AQUA/3 and 5	<30 nephelometric turbidity units

Table 4.7.3     Indicators other than ammonia
chemistry—inorganic chemicals

column 1 item	column 2 indicator	column 3 standard
1	aluminium—
1.1	pH<6.5	≤5μg/L
1.2	pH≥6.5	≤100μg/L
2	ammonia	see table 4.7.8
3	antimony	≤30μg/L
4	arsenic	≤50μg/L
5	beryllium	≤4μg/L
6	cadmium	≤0.2μg/L
7	chlorine	≤2μg/L
8	chromium	≤2μg/L
9	copper	≤2μg/L
10	cyanide	≤5μg/L
11	iron	≤300μg/L
12	lead	≤1μg/L
13	mercury	≤0.1μg/L
14	nickel	≤25μg/L
15	nitrite	≤60μg/L
16	selenium	≤1μg/L
17	silver	≤0.1μg/L
18	zinc	≤5μg/L

Table 4.7.4     Indicators other than ammonia
chemistry—organic chemicals—pesticides

column 1 item	column 2 indicator	column 3 standard
1	aldrin	≤10ng/L
2	atrazine	≤2 000ng/L
3	captan	≤2 800ng/L
4	chlordane	≤4ng/L
5	chlorpyrifos	≤1ng/L
6	cyanazine	≤2 000ng/L
7	2,4-D	≤4 000ng/L
8	DDE	≤14ng/L
9	DDT	≤1ng/L
10	demeton	≤100ng/L
11	dieldrin	≤2ng/L
12	dinoseb	≤50ng/L
13	endosulfan	≤10ng/L
14	endrin	≤2.3ng/L
15	glyphosate	≤65 000ng/L
16	guthion	≤10ng/L
17	heptachlor	≤3ng/L
18	lindane	≤3ng/L
19	malathion	≤70ng/L
20	methoxychlor	≤40ng/L
21	metolachlor	≤8 000ng/L
22	metribuzin	≤1 000ng/L
23	mirex	≤1ng/L
24	parathion	≤4ng/L
25	picrolam	≤29 000ng/L
26	simazine	≤10 000ng/L
27	toxaphene	≤8ng/L

Table 4.7.5     Indicators other than ammonia
chemistry—organic chemicals—non-pesticide anthropogenic organics

column 1 item	column 2 indicator	column 3 standard
1	acrolein	≤200ng/L
2	chlorinated benzenes—
2.1	monochlorobenzene	≤15 000ng/L
2.2	1,2-dichlorobenzene	≤2 500ng/L
2.3	1,3-dichlorobenzene	≤2 500ng/L
2.4	1,4-dichlorobenzene	≤4 000ng/L
2.5	1,2,3-trichlorobenzene	≤900ng/L
2.6	1,2,4-trichlorobenzene	≤500ng/L
2.7	1,3,5-trichlorobenzene	≤700ng/L
2.8	1,2,3,4-tetrachlorobenzene	≤100ng/L
2.9	1,2,3,5-tetrachlorobenzene	≤100ng/L
2.10	1,2,4,5-tetrachlorobenzene	≤150ng/L
2.11	pentachlorobenzene	≤30ng/L
2.12	hexachlorobenzene	≤7ng/L
3	chlorinated ethylenes—
3.1	trichlorethylene	≤20ng/L
3.2	tetrachloroethylene	≤260 000ng/L
4	chlorinated phenols—
4.1	monochlorophenol	≤7 000ng/L
4.2	dichlorophenol	≤200ng/L
4.3	trichlorophenol	≤18 000ng/L
4.4	tetrachlorophenol	≤1 000ng/L
4.5	pentachlorophenol	≤50ng/L
5	halogenated aliphatic compounds—
5.1	hexachlorobutadiene	≤100ng/L
6	halogenated methanes—
6.1	carbon tetrachloride	≤13 000ng/L
6.2	chloroform	≤2 000ng/L
6.3	dichloromethane (methylene chloride)	≤98 000ng/L
6.4	trihalomethanes	≤50 000ng/L
7	monocyclic aromatic hydrocarbons—
7.1	benzene	≤300 000ng/L
7.2	ethylbenzene	≤140 000ng/L
7.3	phenol	≤1 000ng/L
7.4	toluene	≤300 000ng/L
8	phthallate esters—
8.1	di- n -butylphthallate (DBP)	≤4 000ng/L
8.2	di-(2-ethylhexyl) phthallate (DEHP)	≤600ng/L
8.3	other phthallate esters	≤200ng/L
9	polychlorinated biphenyls	≤1ng/L
10	polycyclic aromatic hydrocarbons	≤3 000ng/L

Table 4.7.6     Indicators other than ammonia
chemistry—organic chemicals—organometallics

column 1 item	column 2 indicator	column 3 standard
1	tributyltin	≤8ng/L
2	triphenyltin	≤20ng/L

Table 4.7.7     Indicators other than ammonia
aesthetics

column 1 item	column 2 indicator	column 3 standard
1	oil and grease	not visible

Table 4.7.8     Indicator ammonia

column 1 item	column 2 acidity	column 3 ammonia concentration (mg/L)
temperature →		0 ° C	5 ° C	10 ° C	15 ° C	20 ° C	25 ° C	30 ° C
1	pH 6.50	<2.5	<2.4	<2.2	<2.2	<1.49	<1.04	<0.73
2	pH 6.75	<2.5	<2.4	<2.2	<2.2	<1.49	<1.04	<0.73
3	pH 7.00	<2.5	<2.4	<2.2	<2.2	<1.49	<1.04	<0.74
4	pH 7.25	<2.5	<2.4	<2.2	<2.2	<1.5	<1.04	<0.74
5	pH 7.50	<2.5	<2.4	<2.2	<2.2	<1.5	<1.05	<0.74
6	pH 7.75	<2.3	<2.2	<2.1	<2.0	<1.4	<0.99	<0.71
7	pH 8.00	<1.53	<1.44	<1.37	<1.33	<0.93	<0.66	<0.47
8	pH 8.25	<0.87	<0.82	<0.78	<0.76	<0.54	<0.39	<0.28
9	pH 8.50	<0.49	<0.47	<0.45	<0.44	<0.32	<0.23	<0.17
10	pH 8.75	<0.28	<0.27	<0.26	<0.27	<0.19	<0.16	<0.11
11	pH 9.00	<0.16	<0.16	<0.16	<0.16	<0.13	<0.10	<0.08

Note     Available un-ionised or uncomplexed ammonia present is toxic to a wide range of aquatic organisms and varies with acidity (pH) and water temperature.

Part 4.8     Secondary ambient environmental standards

4.8     Temperature

Temperature changes must not be more than 2 standard deviations from the long-term mean temperature for the relevant month.

4.9     Biological standards

    (1)     Water quality at a site will be considered to be impaired if species richness is more than 20% lower than at an appropriate reference site.

    (2)     Water quality at a site will be considered to be impaired if there is a significant difference in ecosystem community structure from that at an appropriate reference site, as judged by Hocutt's procedure or another appropriate statistical technique.

Table 4.8.1     Indicator—biochemical oxygen demand

column 1 item	column 2 area	column 3 standard
1	Lake Burley Griffin	<51 200kg/y
2	Lake Ginninderra	<8 400kg/y
3	Lake Tuggeranong	<5 600kg/y
4	Murrumbidgee River at ACT border	<110 600kg/y

Table 4.8.2     Indicator—phosphorus (total)

column 1 item	column 2 area	column 3 standard
1	Lake Burley Griffin	<8 600kg/y
2	Lake Ginninderra	<300kg/y
3	Lake Tuggeranong	<600kg/y
4	Murrumbidgee River at ACT border	<83 200kg/y

Table 4.8.3     Indicator—sediment load

column 1 item	column 2 area	column 3 standard
1	Murrumbidgee River—
1.1	•     from Angle Crossing to Gudgenby River junction	<88 000kg/y/river reach
1.2	•     from Gudgenby junction to Point Hut Creek junction	<166 000kg/y/reach
1.3	•     from Point Hut junction to Kambah Pool	<133 000kg/y/reach
1.4	•     from Kambah Pool to Casuarina Sands	<57 000kg/y/reach
1.5	•     from Casuarina Sands to Uriarra Crossing	<101 000kg/y/reach
1.6	•     from Uriarra Crossing to Cusacks Crossing	<66 000kg/y/reach
1.7	•     from Cusacks Crossing to Halls Crossing	<124 000kg/y/reach
1.8	•     from Halls Crossing to Taemas Bridge	<228 000kg/y/reach
2	Molonglo River—
2.1	•     from Burbong to Oaks Estate Bridge	<39 000kg/y/reach
2.2	•     from Oaks Estate Bridge to Dairy Flat Bridge	<19 000kg/y/reach
2.3	•     from Scrivener Dam to Coppins Crossing	<20 000kg/y/reach
2.4	•     from Coppins Crossing to Sturt Island	<25 000kg/y/reach
3	Paddy's River—
3.1	•     from Flints Crossing to confluence with Cotter River	<4 800kg/y/reach
4	Ginninderra Creek—
4.1	•     from Ginninderra Dam to Murrumbidgee River	<9 800kg/y/reach

Table 4.8.4     Sediment contaminants

column 1 item	column 2 indicator	column 3 standard
1	pesticides	sediment total pesticide concentrations must not be more than 2 standard deviations higher than the long-term mean
2	heavy metals (arsenic, cadmium, copper, lead, mercury, nickel, selenium and zinc)	sediment heavy metal concentrations must not be more than 2 standard deviations higher than the long-term mean
3	polycyclic aromatic hydrocarbons (PAHs)	sediment PAH concentrations must not be more than 2 standard deviations higher than the long-term mean