Pumping Station, Smalls Hill Road, Leigh RH2 8PF

LK Mann made this Environmental Information Regulations request to Thames Water
You only have a right in law to access information about the environment from this authority

The request was successful.

Dear Thames Water,

Please provide me with the following information with regard to events of the past 8 years:-

1. Has any surcharge of sewage occurred at this pumping station or its environs? If so, please provide details, including remedial action taken.

2. What is the volume of emergency storage capacity for this pumping station within the public sewer network assets? On how many occasions has this been exceeded in the past 8 years? What emergency overflow pipes and Environment Agency discharge consents are or have been in place for this pumping station?

3. I understand that this pump has a remote monitoring system in place. Please confirm this. How often have these emergency/reactive call out systems been activated in the past 8 years?

4. When was this pumping station last serviced? Is there a date whereby this current pumping station will be replaced?

If you decide that you are exempted from providing any of this information, please provide the statutory provision for the exemption, the class of exemption applied and your reasons for applying the exemption.

Yours faithfully,

Laura Mann
Clerk - Leigh Parish Council

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Thames Water Limited (company number 2366623) and Thames Water Utilities
Limited (company number 2366661) are companies registered in England and
Wales, both are registered at Clearwater Court, Vastern Road, Reading,
Berkshire RG1 8DB. This email is confidential and is intended only for the
use of the person it was sent to. Any views or opinions in this email are
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EIR Requests, Thames Water

Thames Water Utilities Limited
EIR Requests
Clearwater Court
Vastern Road
Reading
Berkshire
RG1 8DB

Telephone:  0800 0093805
Email: [1][email address

28 February 2020

Our Ref: EIR 19-20-288

Environmental Information Request

 

Dear Ms Mann

 

Thank you for your environmental information request. Please find our
response to your questions below.

 

Please provide me with the following information with regard to events of
the past 8 years:-

 

I. Has any surcharge of sewage occurred at this pumping station or its
environs? If so, please provide details, including remedial action
taken.

 

Thames Water records indicate that there have been 13 incidents of
surcharge at Leigh Bridge Sewage Pumping Station (SPS) and the immediate
vicinity since January 2012.

 

Whenever there is a discharge, we clean up immediately afterwards. This
can include the removal of any solids should they be present, clean down
of the area, including any watercourse with final effluent/clean water,
the use of detergents if appropriate. This does depend upon the severity
of any discharge. There are occasions after prolonged periods of heavy
rain when the discharge is so diluted, it is almost entirely rainwater,
but this will still be cleaned up afterwards.

 

+------------------------------------------------------------------------------+
|Leigh Bridge SPS & surrounding network: Surcharge incidents |
|------------------------------------------------------------------------------|
|Date: |Root Cause: |
|-----------------------+------------------------------------------------------|
|27/12/2013 |Unknown |
|-----------------------+------------------------------------------------------|
|11/07/2014 |Power Cut |
|-----------------------+------------------------------------------------------|
|13/01/2017 |Pump Failure |
|-----------------------+------------------------------------------------------|
|27/12/2017 |Hydraulic Overload |
|-----------------------+------------------------------------------------------|
|29/12/2017 |Hydraulic Overload |
|-----------------------+------------------------------------------------------|
|22/01/2018 |Pump Failure/Hydraulic Overload |
|-----------------------+------------------------------------------------------|
|11/06/2019 |Hydraulic Overload |
|-----------------------+------------------------------------------------------|
|12/06/2019 |Hydraulic Overload |
|-----------------------+------------------------------------------------------|
|14/11/2019 |Hydraulic Overload |
|-----------------------+------------------------------------------------------|
|27/11/2019 |Hydraulic Overload |
|-----------------------+------------------------------------------------------|
|13/12/2019 |Hydraulic Overload |
|-----------------------+------------------------------------------------------|
|15/01/2020 |Hydraulic Overload |
|-----------------------+------------------------------------------------------|
|13/02/2020 |Hydraulic Overload |
+------------------------------------------------------------------------------+

 

 

II. What is the volume of emergency storage capacity for this pumping
station within the public sewer network assets? On how many occasions
has this been exceeded in the past 8 years??

 

We do not use the sewer network as emergency storage. Sewage in the
gravity network flows in the wet wells of pumping stations. Each pumping
station is fitted with a number of pumps, the first of which will start
when the wet well reaches a pre-determined level. The pump will stay
running discharging to a Sewage Treatment Works, or in some cases to
another SPS until a second pre-determined level is reached, at which it
will stop. The well will continue to fill until the first level is reached
and a pump again start, repeating the sequence.

 

III. What emergency overflow pipes and Environment Agency discharge
consents are or have been in place for this pumping station

 

Leigh Bridge SPS does not have an EA permit/consented discharge. There are
no emergency overflow pipes from the station. Sewage will discharge from
manholes in the network before it spills from the station. There was once
a ‘temporary deemed consent’ but this has since been revoked.

 

IV. I understand that this pump has a remote monitoring system in place.
Please confirm this. How often have these emergency/reactive call out
systems been activated in the past 8 years?

 

Leigh Bridge SPS has a remote monitoring system that constantly monitors
several parameters sending signals via SCADA back to our Waste Operational
Control Centre (WOCC) in Reading. Many of our staff can access this SCADA
system via computers or handheld devices and therefore monitor the station
remotely. There are literally hundreds and hundreds of signals being
passed from the station every day. The WOCC is manned 24 hrs/day by
experienced staff who monitor signals and readings from all our pumping
stations. 

 

Staff at the WOCC monitor the station and use the information, together
with other information they have such as weather conditions, rainfall,
customer contacts etc and if required, call out technicians, both in and
out of normal working hours, to events they believe needs attention. In
some cases, these are considered emergency situations and at other times
they are none emergency requiring a response for example the next working
day. Since 2012, we have called technicians to Leigh Bridge SPS on 109
high priority occasions. Please note that some of these may be for an
emergency when a pump has stopped working, but because we treat Leigh
Bridge SPS as high priority, many will be to check and confirm the station
is working as it should in periods of heavy rainfall. 

 

V. When was this pumping station last serviced? Is there a date whereby
this current pumping station will be replaced?

 

As well as attending to any call outs, we carry our Routine Operational
Maintenance at Leigh Bridge SPS every 3 months.

 

There are no plans to replace Leigh Bridge SPS. It underwent a significant
refurbishment in 2017 when new, more efficient pumps were fitted. The type
of pumps fitted are more readily available and should one fail we can now
replace it almost immediately with a spare, whereas we would have had to
wait weeks/months if an old pump had failed. New control equipment,
pipework and valves were fitted at the same time. During commissioning of
the refurbished station, we confirmed that flows from the station are in
accordance with what the station and network are designed for.

 

Internal Review

 

If you feel that we have not dealt with your request for environmental
information properly, you can ask us to reconsider our response. Your
complaint must be made in writing and will need to be made no later than
40 working days after you receive our original response.

 

We will carry out an ‘Internal review’ of your complaint to decide whether
we have complied with the requirements set out in the Environmental
Information Regulations 2004. We will inform you of the outcome of our
internal review as soon as possible, and no later than 40 working days
after receiving the complaint.

 

Disclaimer:

 

The information provided with this letter is taken from the information we
hold on our records as at the date indicated. We cannot guarantee the
accuracy of this information and it should not be relied on for any
purpose.

 

Under the Regulations, Thames Water has a duty to individuals requesting
information to make that information available on request and in the
format requested, and must comply with this duty, unless one of the
exceptions contained within the Regulations applies.

 

On this occasion, as the time (chargeable under our published charging
regime) taken to prepare the response has fallen under our minimum limit
for charging, we have waived the fee; We reserve the right to charge in
accordance with the fees published on our web site for any future
requests.

 

For more information about our interim charges scheme please click
[2]here.

 

Should you have any questions, please don’t hesitate to contact me.

 

Yours sincerely

 

 

 

Paul Bridgens

Data Protection Advisor

Group Legal & Data Protection Team

 

 

 

Visit us online www.thameswater.co.uk , follow us on twitter
www.twitter.com/thameswater or find us on www.facebook.com/thameswater.
We’re happy to help you 24/7.

Thames Water Limited (company number 2366623) and Thames Water Utilities
Limited (company number 2366661) are companies registered in England and
Wales, both are registered at Clearwater Court, Vastern Road, Reading,
Berkshire RG1 8DB. This email is confidential and is intended only for the
use of the person it was sent to. Any views or opinions in this email are
those of the author and don’t necessarily represent those of Thames Water
Limited or its subsidiaries. If you aren’t the intended recipient of this
email, please don’t copy, use, forward or disclose its contents to any
other person – please destroy and delete the message and any attachments
from your system.

References

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1. mailto:[email address]
2. https://corporate.thameswater.co.uk/abou...