ACID SULFATE SOILS
SUMMARY FORM C
POST- DEWATERING MONITORING REPORT
SITE LOCATION DETAILS
Site name: (e.g. where site may be known by a common/
business name)
Lot
No.
and/or
Street
No.
Street Name:
Suburb / Town:
Certificate of Title Reference (or equivalent)
(e.g. Volume/ Folio) (attach a copy):
Postcode:
Crown Reserve: (if applicable)
Local Government:
NOTE
If Certificate(s) of Title (CoT) have changed since the initial Acid Sulfate Soils Assessment Site Summary Form was
submitted, the new CoTs need to be attached to this document.
PREVIOUS INVESTIGATIONS
Provide details of all previous ASS reports – e.g. ASS investigations and ASS management plans, ASS Closure
Reports
(Report title, date and author)
WATER QUALITY MONITORING
Page #
Complete the following section, indicating report page number and/or document attachment
reference to relevant information.
Duration of dewatering
days
Volume of groundwater abstracted
kL
Mean groundwater abstraction rate
L/s
Radius of cone of groundwater depression
m
Maximum depth of groundwater drawdown
m
Dewatering effluent disposal method
Dates of dewatering?
mth:
yr:
to
mth:
yr:
What was the period of post-dewatering groundwater
monitoring at the site?
mth:
yr:
to
mth:
yr:
How many groundwater monitoring events were
undertaken?
What were the dates of the groundwater monitoring
events?
Page 1 of 5
Department of
Environmental Regulation
ACID SULFATE SOILS
SUMMARY FORM C
POST- DEWATERING MONITORING REPORT
WATER QUALITY MONITORING (Cont..)
Complete the following section, indicating report page number
and/or document attachment reference to relevant information.
YES –
Page #
NO
Not applicable or other
comment
Was the laboratory NATA-accredited for water analysis?
(Y/N)
If NO, please justify:
Laboratory details
Does the post-dewatering closure report discuss in detail
the results of the groundwater monitoring program (plus
surface water body monitoring program, where
applicable) with particular emphasis on trends in water
quality?
Are copies of all required NATA-accredited laboratory
certificates for water included?
Are copies of all required calibration certificates for
water sampling equipment included?
Were the locations of groundwater monitoring wells
relevant to the locations of site works such that they
were able to detect changes in groundwater resulting
from site works?
If YES, provide the page reference(s) for site plan detailing well
locations in proximity to ground disturbance, water treatment and
effluent infiltration areas.
Are groundwater quality trends graphed and discussed
in the report?
Following the post-dewatering monitoring period, is the
groundwater quality at the site representative of
background/pre-works groundwater quality?
Page 2 of 5
Department of
Environmental Regulation
ACID SULFATE SOILS
SUMMARY FORM C
POST- DEWATERING MONITORING REPORT
WATER QUALITY MONITORING (Cont..)
Details of groundwater quality
encountered at the site prior to the
commencement of development works?
Details of pre-treatment dewatering
effluent quality during development
works?
Details of post-treatment dewatering
effluent quality during development
works?
Details of groundwater quality
encountered at the site during
development works?
Details of groundwater quality
encountered at the site during postdevelopment monitoring?
pH
Range:
Range total
acidity (mg/L
equivalent
CaCO3):
Range total
alkalinity
(mg/L
equivalent
CaCO3):
Mean
pH:
Mean total
acidity:
Mean total
alkalinity:
pH
Range:
Range total
acidity:
Range total
alkalinity:
Mean
pH:
Mean total
acidity:
Mean total
alkalinity:
pH
Range:
Range total
acidity:
Range total
alkalinity:
Mean
pH:
Mean total
acidity:
Mean total
alkalinity:
pH
Range:
Range total
acidity:
Range total
alkalinity:
Mean
pH:
Mean total
acidity:
Mean total
alkalinity:
pH
Range:
Range total
acidity:
Range total
alkalinity:
Mean
pH:
Mean total
acidity:
Mean total
alkalinity:
Page 3 of 5
Department of
Environmental Regulation
ACID SULFATE SOILS
SUMMARY FORM C
POST- DEWATERING MONITORING REPORT
SUMMARY
Answer the following questions based on your professional
experience applied to the site
YES –
Page #
NO
Not applicable or
other comment
At the completion of the monitoring period and allowing for
natural seasonal variations, is the groundwater quality across
the site stable?
With regard to currently relevant guidelines, is groundwater
beneath the site suitable for the irrigation of public open
spaces? (What guidelines were used to draw this conclusion?)
With regard to currently relevant guidelines, is groundwater
beneath the site suitable for non-potable domestic use? (What
guidelines were used to draw this conclusion?)
In your professional opinion does the groundwater quality
beneath the site present any risk, or potential risk, to the
environment or any environmental value? (What guidelines were
used to draw this conclusion?)
In your professional opinion is further groundwater monitoring
required at the site or off-site?
In your professional opinion are groundwater remedial works
required at the site or off-site?
With regard to currently relevant guidelines, are there any areas
of potential concern regarding surface water quality at the site
or off-site? (What guidelines were used to draw this conclusion?)
In your professional opinion is further surface water monitoring
required at the site or off-site?
In your professional opinion are surface water remedial works
required at the site or off-site?
In your professional opinion, have site works caused any
deterioration in soil, groundwater or surface water quality,
either on-site or off-site?
In your professional opinion, is long-term ASS or
contamination management recommended or required at the
site or off-site?
In your professional opinion, should the site be reported under
the Contaminated Sites Act 2003?
Page 4 of 5
Department of
Environmental Regulation
ACID SULFATE SOILS
SUMMARY FORM C
POST- DEWATERING MONITORING REPORT
DECLARATION:
Acid sulfate soils and/or dewatering management were conducted in accordance with current Best Management Practice
and current DER guidelines and a DER-approved acid sulfate soil management plan. The information contained in this
closure report summary form is a true representation of the information contained within the attached
report(s)/document(s). Any concerns relating to potential impacts to human health, the environment and environmental
values have been highlighted within this form.
Full name of Environmental Consultant / Agency
submitting the report:
Supervising / Principal Environmental Consultant
Name:
Signature:
Date:
M AI L TH E CO MPLE TE D FO RM TO :
Acid Sulfate Soils Section
Department of Environment Regulation
Locked Bag 33
Cloisters Square
Perth WA 6850
Page 5 of 5
Department of
Environmental Regulation