+353 1 460 5912 info@cwsl.ie

Case Studies

Print Friendly, PDF & Email

DCC permanent Monitoring Contract

Background

Capital Water Systems Ltd. are currently contracted to maintain 16 survey monitoring locations throughout the city of Dublin for the purposes of monitoring Flow and billing for other Local Authorities. The catchments vary in size, with installations ranging from 300mm diameter local catchments to trunk sewers measuring 1750mm in diameter.

Challenges associated with this project included safe access and egress for all the sites, out of hours works, understanding the effects of rainfall on individual sites, surcharging and ragging and its affect on instrumentation, data consistency and upgrading of equipment and monitoring systems.

 

Tasks

  • Maintenance of 16 No. Sewer Flow Monitors for Dublin City Council
  • Quarterly maintenance and calibration inspections
  • Reactive emergency inspections
  • Data analysis and quarterly daily flow totals reporting
  • Monthly, Quarterly and Annual progress reports
  • Continuously updating the client on progress of various aspects of the project.
  • Proposal of site specific solutions to meet Dublin City Council monitoring requirements

Solutions Delivered to date

  • Significant decrease in maintenance costs and emergency call outs
  • Complete upgrade of all flow survey instrumentation leading to 80% decrease in emergency call outs
  • Upgrade to web based data monitoring system
  • Upgrade to alarm system in the sewer network
  • Significant increase in flow data consistency at each location
  • Consistent data capture at previous problem sites
Cork Lower Harbour Main Drainage Scheme Flow Load & Rainfall Survey

Background

The project included the installation and maintenance of 12 Sewer Flow and Load sites, over 40 additional Sewer Flow sites and 12 Raingauge sites in 4 separate catchments in the Cork. The project involved twice weekly maintenance of all equipment over a period of 6 weeks with 14 days continuous 24 hour composite sampling at the 12 load locations.

 

Tasks

  • Project Supervisor Construction Stage
  • Conduct site specific risk assessments
  • Development of a Site Safety & Traffic Management Plans
  • Attending site meetings and arrange to meet contacts and subcontractors on site during the survey period
  • Selection of suitable monitoring locations
  • Installation of equipment
  • Site inspections on a bi-weekly basis
  • Supervision of subcontractors
  • Liaise with Client
  • Repositioning & adding meters as required
  • Interim and Final Reporting
  • Office support as required

Solutions Delivered

  • Consistent accurate data capture at monitoring locations
  • Supplied & maintained all monitoring equipment as required for duration of the contract
  • Additional monitoring as requested
  • Completion of 14 days continuous sampling at 12 sites with consistent flow data over the period for each of the sites.
  • Successful completion of on-site work with no impact on client activities
  • Continued office support following contract completion
  • Consistent information on flow rates and loadings in the various lower harbour catchments
  • Information on infiltration and impact of surface water in the catchments
  • Highlighting where improvements to the certain areas of the network would have a significant benefit to the overall system
  • Identification of losses through CSOs
  • Verification of tidal influence in certain catchment areas
Ballyloughaun Beach Monitoring Contract

Background

Capital Water Systems were employed by Galway City Council to carry out monitoring and sampling at three separate beach and outfall locations in the Ballybane/Renmore/Mervue area of Galway with the aim of determining to what extent, if any, the outfalls were contributing to Bathing Water quality issues at Ballyloughaun Beach.

 

Tasks

  • 13 Week flow and rainfall survey at three outfall locations
  • Weekend sampling program for microbial and chemical sampling at 3 beach and three outfall locations
  • Constant contact with Client in relation to microbial results
  • Installation of additional CSO monitors in each catchment
  • Weekly calibration checks & interim reporting
  • Final Report

Solutions Delivered to client:

  • Consistent accurate flow data from all flow and CSO monitoring sites
  • Consistent sample capture
  • Identification of possible problem CSO with very low threshold spill activation
  • Confirmation of rainfall intensity rates for CSO activation
  • Confirmation that remedial work on CSO did not back site flows downstream
Costelloe RWSS Monitoring Project

Background

The Costelloe RWSS project included the design, supply, installation and maintenance of equipment to to monitor Water Quality, Flow and Rainfall at inlet and outlet locations of Glenicmurrin Lake, Co Galway.

The proposed works for the project were located in a Special Area of Conservation (SAC). This imposed certain restrictions on materials and equipment that could be used. Capital Water Systems Ltd were able to fully comply with all conditions.

 

Tasks

  • To specify remote monitoring equipment to meet requirements for contract.
  • Liaise with client before the installation to ensure all interested parties are satisfied with the installation station and the methods employed to install the station.
  • Build the monitoring station at outlet from Glenicmurrin Lake taking into account the SAC status of the area.
  • Install all equipment on site and setup & test telemetry
  • Undertake Hydrometric Gauging at Level location using ADCP “Streampro” Current Profiler
  • Take various level readings at the inlet to Glenicmurrin Lake
  • Maintain regular contact with the Client on the status of the project
  • Regular maintenance and calibration of equipment

Solutions Delivered

  • Design and build of monitoring station in a SAC to the satisfaction of the client and all interested parties.
  • Supply and maintenance of equipment as required for monitoring of outlet of Glenicmurrin Lake
  • Hydrometric gauging for development of rating curves
  • Required data retrieval and Telemetry
  • Information on flow rates into the Glenicmurrin Lake
  • Level information for Glenicmurrin Lake in relation to inlet flows
  • Information on water quality at the outlet of Glenicmurrin Lake for use in a future tender process
  • Remote access to raw water data