Compliant Utility Detection & Mapping
PAS 128:2022 is the most up-to-date specification for underground utility detection. The purpose of the PAS 128 specification is to set out the accuracy to which survey data is captured.
The quality expected from the data and the confidence in the information is highlighted. Where it is appropriate to specify a PAS 128 survey, there are benefits for the client, the practitioner and the general public.
The specification covers:
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The project planning and scoping process
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The classification system for quality levels. This system is based on the survey category type, the location accuracy, the need for post-processing and the level of supporting data.
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Desktop utility records search
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Detection
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Verification
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Location
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Deliverables
As a result, PAS 128 provides a robust procedure for delivering quality utility surveys in the UK. There are four survey quality levels which the client can specify: A through to D. Each level focuses on the degree of precision that must be adhered to for the utility survey to be PAS 128 compliant. What's more, a survey area may be subdivided so that various and appropriate survey levels can be undertaken in different regions of the site.
The ability to segment areas of the survey area and apply different levels of PAS 128 to each, allows survey providers, such as SUMO to offer you a survey which meets your budget requirements as well as being compliant.
The following table shows the scope of each type of survey and an appreciation of the cost benefit.
Quality Level.
Scope upon which results are based
Relative accuracy obtained
Relative confidence level in results
Relative cost
D
Desktop utility records search
Lowest
Lowest
Lowest
C
Site reconnaissance
Medium low
Medium low
Medium low
B
Detection with EML and GPR*
Medium high
Medium high
Medium high
A
Verification using intrusive inspection**
Highest
Highest
Highest
* A minimum of the two techniques of electro-magnetic location and ground probing radar is required for a PAS 128 compliant survey. The client specifies the methodology and intensity of the detection survey.** The verification survey specifies recording information available from manholes and intrusive excavation.
Example above of varying Levels of PAS 128 applied to a site area. Notice how the most intensive PAS 128 levels have been concentrated in areas where typically lots of utilities are found; such as around the buildings. A less intense PAS 128 quality level has been applied to the field areas. In doing this, you can still obtain sufficient survey data at a fraction of the cost.
The benefits of a SUMO PAS 128 Survey
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Those involved in the design process, such as consulting engineers, benefit from the consistent, high-quality data obtained from utility surveys.
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A quicker, straighter forward comparison of competing quotes, as all PAS 128 compliant quotations should rely on a similar methodology.
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Construction professionals benefit from accurate survey data, which can be utilised for records of new works, facilities management, statutory document records and more.
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Lower-risk of utility strikes.
What deliverables will I receive from SUMO?
The output of a SUMO PAS 128 Survey includes a colour coded CAD drawing showing all the detected utilities within the survey area, as well as the depths and quality levels shown. At SUMO, we can supply PAS 128 deliverables in a range of digital formats. Furthermore, SUMO is committed to offering its industry-leading knowledge in the form of FREE PAS 128 technical presentations aimed at improving your teams PAS 128 Survey knowledge and ensuring all site staff understand the deliverables given to them on site.
What are the benefits of a SUMO PAS 128 Survey?
Did you know that the PAS 128 Specification was part-funded by SUMO? Two technical directors of the SUMO Group were also appointed to the Drafting Panel and The Steering Group to assist with the writing of the PAS. The guiding role that SUMO played in the creation process means that we have an in-depth and unrivalled understanding of how PAS 128 works, allowing us to identify the best and most economical approach to applying PAS 128 certified survey options to your site.
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How accurate is SUMO's underground utility survey and what types of utilities can it locate?Using cutting-edge technologies like electro-magnetics, signal induced threading, and Ground-Penetrating Radar (GPR), our underground utility surveys accurately detect a wide array of buried utilities including metal and plastic pipes, drainage systems, electricity cables, telecoms, and fiber optic cables. The methodology ensures high accuracy without the need for invasive trial holes.
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What is the turnaround time for obtaining results with SUMO's Underground Utility Detection service?SUMO’s service is built for rapid response. Contractors can receive immediate results onsite. Our equipment provides real-time information, and once we leave the site, the detected utilities are visibly marked on the ground surface for quick reference.
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Does SUMO provide detailed mapping of the detected utilities for permanent records or construction purposes?Absolutely, SUMO not only marks the detected utilities on-site but also offers high-quality, color-coded survey drawings. These drawings can include topographic features and a comprehensive record of the utility detection survey, ensuring it meets the client’s needs for future reference or pre-construction design works.
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Topographical and Geophysical surveyIn addition to mapping out utilities, our experience team can accurately survey the land, creating topographical drawings for use. With our state-of-the-art aerial technology, nothing is missed.
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What additional information can be included in the underground utility mapping service provided by SUMO?In addition to topographic features, SUMO’s mapping service can include fixed surface utility features such as inspection chambers, valve boxes, and telegraph poles. It can also incorporate key topographic details like building lines, fence lines, kerb lines, street furniture, street names, building names, and house numbers, facilitating easy site location.
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Does the utility mapping service by SUMO include standard referencing and compatibility with existing survey data?Yes, SUMO ensures the utility mapping references the ordnance survey grid and level datum as standard. Additionally, the drawings can be supplied to a specified grid and level datum and can overlay an existing topographical survey, making it a versatile and adaptable service for various project needs.
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What sets SUMO Services apart from other survey providers?SUMO stands out due to our impeccable level of service with nationwide coverage, state-of-the-art equipment, and our commitment to delivering top-quality, detailed colour-coded survey drawings in both hard and electronic formats.
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How do I request a survey quotation from SUMO Services?Requesting a quotation is easy. Just click on the "Request a Survey Quotation" button on this page, and our team will get in touch with you promptly.
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Can I book a SUMO Survey online?Yes, you can! Simply click on the "Book a SUMO Survey" button on this page, and you can schedule your survey with us at your convenience.
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What type of survey is suitable for my project or site?Our experienced team will work with you to determine the most appropriate survey for your specific needs. Contact us, and we'll assist you in making the right choice.
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Can I obtain both digital and hard copies of survey drawings?Absolutely. We offer the convenience of electronic copies for digital use and hard copies for your records. Just let us know your preference.
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Do you provide custom survey solutions for unique projects?Yes, we understand that every project is unique. Our team is highly adaptable and can tailor our surveying services to meet your specific requirements.
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How do I get in touch with SUMO Services for further questions?For any additional questions or inquiries, feel free to contact us through the contact form, and our dedicated team will assist you promptly.
Utility Surveys
PAS 128 Utility Survey
Statutory Plan Collation
