This is an HTML version of an attachment to the Official Information request 'Above ground sewage tanks'.
Email 17

From: Zeean Brydon [mailto:[email address]<mailto:[email address]>]
Sent: Monday, 9 May 2016 9:28 p.m.
To: 'Kevin O'Keeffe' <Kevin.O'[email address]<mailto:[email address]>>
Cc: 'Sheryl Barker' <[email address]<mailto:[email address]>>
Subject: SR356224 - 79 Taranaki Street - Request to confirm Sewer Size

Hi Kevin

Would you be able to confirm the size of the WW main in Taranaki Road

The 150mm diameter section from WW35573 to WW36428 as shown on Hywel’s long section in the email below.


Zeean Brydon | Associate Engineer


m 022 639 2212
e2Environmental Ltd
14 Queen St, Blenheim
PO Box 380, Blenheim 7201<>

From: Sarah Zhou [mailto:[email address]]
Sent: Friday, 6 May 2016 2:16 p.m.
To: [email address]<mailto:[email address]>
Subject: FW: SR356224 - 79 Taranaki Street - Capacity Enquiry Response


From: Hywel Lewis
Sent: Friday, 6 May 2016 2:02 p.m.
To: Sarah Zhou
Subject: FW: SR356224 - 79 Taranaki Street - Capacity Enquiry

Hi Sarah, based on 2012 COP the 150mm pipe work downstream of this site is undersized. It would be a good idea to get Kevin to confirm the pipe sizes in this part of the network. Notwithstanding 225mm pipework is also undersized.

Hywel Lewis Senior Engineer Modelling

Tel +64 4 910 3800 DDI [mobile number]

Private Bag 39804, Wellington Mail Centre 5045
Level 4, IBM House, 25 Victoria Street, Petone, Lower Hutt<>

Wellington Water is owned by the Hutt, Porirua, Upper Hutt and Wellington city councils and Greater Wellington Regional Council.
We manage their drinking water, wastewater and stormwater services.

From: Zeean Brydon [mailto:[email address]]
Sent: Tuesday, 3 May 2016 11:52 a.m.
To: Hywel Lewis
Subject: SR356224 - 79 Taranaki Street - Capacity Enquiry

Hi Hywel

David Wilson suggested I contacted you about this site – he seems to think you might have a WW model for this area.

I’m looking at this RC for Sheryl Barker, The site is 79 Taranaki Street. The site and existing WW discharge lateral are showing on the attached GIS extract.

The applicant is proposing to convert 5 floors of office to ‘residential’ accommodation.

Pre Development

The current office floor plans show 2 ‘toilet’ areas per floor with a total of 4 urinals, 7 basins, 7 toilets, and 2 cleaners sinks – so not much. Office floor area (including the toilet space) is 841m2 over 6 floors (one floor will remain as office after the conversion) giving a total floor area of 5046m2.

Post Development

1 floor will remain as office – 841m2.

5 floors will be converted to ‘residential’. This is however high density 1 to 3 bedroom appartments.

Floors 1 – 4 will have 25 beds, 14 bathrooms and 14 kitchen units - I haven’t looked at flows but if you took beds alone this would be equivalent to 8 x 3 bedroom houses.

Floor 5 will have 8 beds, 9 bathrooms and 2 kitchen units – so again based on number of beds – 3 x 3 bedroom houses.

So expecting quite a significant increase in off-site WW discharge.

Is it possible to check if this will cause any capacity issues.

Please feel free to get back to me if you need any further information.


Zeean Brydon. Associate Engineer

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m 022 639 2212
e2Environmental Ltd
14 Queen St
PO Box 380
Blenheim 7201

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