6.5.22 - 60 Glenridge Drive Cooroibah Effluent Disposal Report-B

 

CHIEF EXECUTIVE APPROVAL 14/2014
Plumbing and Drainage Act 2002, part 5.

Government

Approval

1. The Advanced Enviro-septic (AES) (‘the System’) described in the Specifications and

Drawings in the attached Schedule and manufactured by Presby Environmental Inc.
Whitefield, New Hampshire (“the manufacturer’) and supplied by Chankar Environmental Pty
Ltd (ACN 148 175 455) (‘the supplier’) has been assessed in accordance with the
Queensland Plumbing and Wastewater Code (QPW Code) dated 15th January 2013.

Approval is granted for an advanced secondary quality wastewater treatment system,
subject to compliance by the manufacturer/supplier with the requirements of the Plumbing
and Drainage Act 2002, part 5 and the conditions of approval detailed below.

This approval, the conditions of approval and the Schedule comprise the entire Chief
Executive Approval document.

Any modification by the manufacturer/supplier to the design, drawings or specifications
scheduled to this approval must be approved by the Chief Executive.

Conditions of approval

5.

The manufacture, installation, operation, service and maintenance of the systems must be
inconformity with the conditions of this Chief Executive Approval.

The advanced secondary quality wastewater treatment system, which is an example of the
approved systems, may only be used on premises that generate per day:

(a) a maximum hydraulic loading of 90L / 3 metre length of AES piping system
(b) a maximum organic loading of 240mg/L BODs
(c) a maximum total suspended solids of 300mg/L.

The system must continue to mest the requirements of advanced secondary quality
wastewater treatment system, producing the following effluent quality —

(a) 90% of the samples taken must have a BODs less than or equal to 10 g/m® with no
sample greater than 20 g/m’.

(b) 90% of the samples taken must have total suspended solids less than or equal to
10g/m* with no sample greater than 20g/m*.

. Each system must be serviced in accordance with the details supplied in the owner's

operation and maintenance manual.

. The system design is based upon secondary quality effluent design loading rate as defined in

ASINZ1547 using the AES Design Calculator prepared by a qualified designer. System
designs must be verified and signed by the supplier before being submitted to the Local
Government.

Chief Executive Approval hW

10. A septic tank conforming to AS/NZ 1546.1 and sized in accordance with AS/NZ 1547 for the
influent hydraulic load from the dwelling is a pre-requisite. Waste from the septic tank is to
be diverted to the AES piping system prior to the system sand and basal area. The septic
tank that feeds into the system must be regularly monitored and maintained (including de-
sludging) in accordance with AS/NZ 1547 to ensure optimum operation of the system.

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- When granting a compliance permit, the local government must satisfy itself that the
designer's choice of the system configuration is optimal for the proposed use and site
conditions and that the effluent can be retained within the land application area.

12. Each application for a compliance permit to install a system must also be accompanied by a
copy of a completed Advanced Enviro-Septic Design Calculator Report endorsed by the
supplier, showing the footprint/basal area of the proposed system and number of pipe
modules for the site.

13. An inspection/sampling point must be installed permanently in the sand immediately below
the half-way point of the AES piping system. Where a system is installed in a sloping basal
area an additional inspection/sampling point must be installed at the lowest point of the
system extension.

14, Each system installation must be inspected and checked by the designer or the designers’
agent. The designer on completion, is to certify that the system has been constructed,
installed and commissioned in accordance with its design, the conditions of accreditation and
any additional requirements set in the permit.

15, Routine maintenance of the system at set intervals, other than septic tank sludge levels, is
not stipulated by the manufacturer/supplier. However, routine monitoring may be required by
the Local Government. In the event of failure of the system’s land application area an AES
authorised person may need to follow the rejuvenation procedures set out in the
manufacturer/supplier’s Design and Installation Manual.

16. Where a system installed at a site, has been found not to operate satisfactorily during its
service life, and as a result requires modification to achieve the required performance
requirements, in particular, water quality limits, the installed system is to be modified
accordingly. Any modifications including any of the supplier's rejuvenation procedure
outcomes must be recorded on the service report.

17. Permitted use of the effluent is for sub-surface absorption only.

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. Each system must be supplied with —

(a) acopy of this Chief Executive Approval document;

(b) details of the system;

(c) _ instructions for authorised persons for its installation;

(d) a copy of the owner's manual to be given to the owner at the time of installation; and
(e) detailed instructions for authorised service personal for its operation and maintenance.

19. At each anniversary of the Chief Executive Approval date, the supplier must submit to the
Chief Executive a list of all systems installed in Queensland during the previous 12 months.
Where the Chief Executive is notified of any system failures the Chief Executive may
randomly select a number of installed systems for audit. The Chief Executive will notify the
supplier's nominated NATA accredited laboratory which systems are to be audited for BODS
and TSS. The sampling and testing of the selected systems, if required, is to be done at the
supplier's expense. The following results must be reported to the Chief Executive;

(a) Address of premises;

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