Whitehaven Coal : MCC - April 2024 EPL Monitoring Summary

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MAULES CREEK COAL MINE - MONTHLY MONITORING SUMMARY

Site Information

EPL No: 20221

EPA Website Link: Hyperlink to Maules Creek Coal, Environment Protection Licence

Licensee: Maules Creek Coal Mine Pty Ltd

Licensee Address: Maules Creek Coal Mine, Therribri Road, BOGGABRI NSW 2382

EPL Monitoring Points: See Figure 1 below

Sampling Period: April 2024

Obtained Date: 15th May 2024

Publication Date: 16th May 2024

Context: This Monthly Monitoring Summary aligns with the Environment Protection Licence (EPL) No. 20221 - Maules Creek Coal Mine issued 2nd August 2022 by the NSW Environment Protection Authority (EPA).

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Monthly Monitoring Summary

Ground Water Monitoring

Table 1 - Groundwater Quality Monitoring

ID	Parameters	Units	Frequency		Samples	Date	Laboratory	Min	Mean	Max / Only
EPL (Bore)		Results Received	Value
15	pH	pH
Conductivity	µs/cm	Quarterly				Next sample in June 2024
(BCM01)
TDS	mg/L
16	pH	pH
Conductivity	µs/cm	Quarterly				Next sample in June 2024
(BCM03)
TDS	mg/L
17	pH	pH
Conductivity	µs/cm	Quarterly				Next sample in June 2024
(REG10A)
TDS	mg/L
24	pH	pH
Conductivity	µs/cm	Quarterly				Next sample in June 2024
(RB05A)
TDS	mg/L

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Surface Water Monitoring

Table 2 - Surface Water Monitoring - Mine Void

ID	Parameter	Units	Frequency	Samples	Date	Laboratory Results	Min	Mean	Max / Only
EPL (Site)	Received	Value
	TSS	mg/L							<5
12	Conductivity	µs/cm	Every 2	1	11/04/2024				1240
(Mine Void)	Oil & Grease	mg/L	months				<5
	pH	pH							8.02

Table 3 - Wet Weather Discharge - Surface Water Monitoring

ID

Laboratory

Min

Mean

Median

Parameter

Units

Frequency

Samples

Date

Results

Max / Only Value

EPL (Site)

Value

Value

Value

Received

Conductivity

µs/cm

Nitrate

mg/L

Special

Nitrogen (total)

mg/L

Frequency 1 -

Oil & Grease

mg/L

3

within 12

pH

pH

(SD3)

hours of

Phosphorous

mg/L

discharge from

Reactive

mg/L

EPL 3 or 36.

Phosphorous

TSS

mg/L

Conductivity

µs/cm

No discharge occurred from these monitoring locations

Nitrate

mg/L

Nitrogen (total)

mg/L

Special

Oil & Grease

mg/L

Frequency 1 -

36

pH

pH

within 12

(SD12)

Phosphorous

mg/L

hours of

Reactive

mg/L

discharge from

Phosphorous

EPL 3 or 36

TSS

mg/L

Conductivity

µs/cm

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Table 4 - Clean Water Discharge - Surface Water Monitoring

D						Laboratory	Min	Mean	Median	Max / Only
Parameter	Units	Frequency	Samples	Date	Results
EPL (Site)	Value	Value	Value	Value
					Received
	Conductivity	µs/cm
	Nitrate	mg/L
	Nitrogen (total)	mg/L
	Oil & Grease	mg/L
	pH	pH
	Phosphorous	mg/L	Special
	Reactive	mg/L	Frequency 3 -
38	Phosphorous	within 12
(Flow Meter	TSS	mg/L	hours of
Upstream)	Conductivity	µs/cm	discharge
	Nitrate	mg/L	from any
	Nitrogen (total)	mg/L	discharge
	Oil & Grease	mg/L	location.
	pH	pH
	Phosphorous	mg/L
	Reactive	mg/L
	Phosphorous
					No flow was recorded at these sites.
	TSS	mg/L
	Conductivity	µs/cm
	Nitrate	mg/L
	Nitrogen (total)	mg/L
	Oil & Grease	mg/L
	pH	pH	Special
	Phosphorous	mg/L
	Frequency 3 -
	Reactive	mg/L
	within 12
39	Phosphorous
	hours of
(Flow Meter	TSS	mg/L
discharge
downstream)	Conductivity	µs/cm
from any
	Nitrate	mg/L
	discharge
	Nitrogen (total)	mg/L
	location.
	Oil & Grease	mg/L
	pH	pH
	Phosphorous	mg/L
	Reactive	mg/L
	Phosphorous

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	TSS	mg/L
	TSS	mg/L	Special
	Frequency 2
			- prior to
	Conductivity	µs/cm	discharging
	from EPL 45
			and/or 46 or
40			within
(HWD8)	Oil & Grease	mg/L	12hours of
	discharge
			caused by
			38.4mm in a
			5 Day
	pH	pH	consecutive
			period
	TSS	mg/L	Special
	Frequency 2
			- prior to
			discharging
	Conductivity	µs/cm	from EPL 45
			and/or 46 or
41			within
(HWD9)			12hours of
	Oil & Grease	mg/L	discharge
	caused by
			38.4mm in a
			5 Day
	pH	pH	consecutive
			period
	TSS	mg/L	Special
	Frequency 2
			- prior to
	Conductivity	µs/cm
	discharging
			from EPL 45
42	Oil & Grease	mg/L	and/or 46 or
(HWD10)			within
			12hours of
			discharge
	pH	pH	caused by
			38.4mm in a
			5 Day

6

			consecutive
			period
	TSS	mg/L	Special
			Frequency 2
			- prior to
			discharging
	Conductivity	µs/cm	from EPL 45
			and/or 46 or
43			within
(HWD11)			12hours of
			discharge
	Oil & Grease	mg/L	caused by
	38.4mm in a
			5 Day
			consecutive
	pH	pH	period
			Special
			Frequency 2
	TSS	mg/L	- prior to
	discharging
			from EPL 45
			and/or 46 or
44			within
(WCWD)			12hours of
			discharge
	Conductivity	µs/cm	caused by
			38.4mm in a
			5 Day
			consecutive
	Oil & Grease	mg/L	period

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pH

pH

	TSS	mg/L
	Conductivity	µs/cm	not more
45			than 12
		hours after
(ECWDP)
		discharge
	Oil & Grease	mg/L
	commences
	pH	pH
	TSS	mg/L
			not more
	Conductivity	µs/cm
46	than 12
		hours after
(WCWDP)
Oil & Grease	mg/L	discharge
			commences
	pH	pH

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Noise Monitoring

Table 5 - Noise Monitoring (Attended - Measured)

Table 6 - Noise Monitoring (Attended - Low Frequency Assessment)

None of the measurements satisfied the conditions for further assessment when assessed for the applicability of low frequency modification factors in accordance with the EPA's Noise Policy for Industry. Therefore, no further assessment of low frequency noise was required to be undertaken.

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Blast Monitoring

Table 7 - Blast Monitoring (Blasts - Limits Apply)

Location	Parameter	Units	Frequency	Number	Average	Max	100% Limit	Exceedance
(Yes / No)
Operations	Overpressure	Db (Lin Peak)	All	7	94.3	109.9	120	No
Blasts	Vibration	mm/s	7	0.1	0.26	10	No

Note: As of March 2018, in accordance with the requirements of the approved variation of EPL 20221; M7.1 blast monitoring results are for four blast monitoring points 31 (BM1), 32 (BM2), 33 (BM3) and 34 (BM4).

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Air Quality Monitoring

Table 8 - PM10 (Limits Apply)

ID	Sample			Rolling	NEPM	Exceedance
Unit	Parameter	Annual	Annual
EPL (Site)	period	(Yes / No)
		Average	Criteria
18	Continuous	µg/m3 month	PM10	11.4	30	No
(TEOM1)
37	Continuous	µg/m3 month	PM10	14.3	30	No
(TEOM3)
19	5 days	µg/m3	PM10	15.7	30	No
(HVAS)

Table 9 - Depositional Dust (Limits Apply)

			Rolling
ID	Sample	Particulates	Annual		Exceedance
Deposited	Average	Criteria
EPL (Site)	period	(Yes / No)
Matter	Insoluble
			Solids
20	Monthly	g/m2 month	2.2	4	No
(DDG1/MC1)
21	Monthly	g/m2 month	2.2	4	No
(DDG2/MC2)
22	Monthly	g/m2 month	2.0	4	No
(DDG3/MC3)
23	Monthly	g/m2 month	1.1	4	No
(DDG4/MC4)