Environment Agency Pollution Prevention Guidance Notes (PPG's)

PPG20 Dewatering underground ducts and chambers

Guidance to assist those engaged in the dewatering of underground ducts and inspection chambers.

Point 3, Avoiding pollution - c ii controlling quality, is of particular interest.

Point 3cii states: "Any light contamination by oil can be removed from the surface of the water with absorbent materials. Where the water is heavily contaminated with oil, the entire contents of the duct or chamber should be pumped to suitable containers or removed by vacuum tanker and taken to a licenced waste disposal site. If a duct or chamber is susceptible to oil pollution, absorbent pillows or pads can be left in place and removed at the next visit."

PPG20 Dewatering underground ducts and chambers. (in HTML format)

The original document is available in Adobe PDF format and you should ensure that you have the latest version installed on your system.

PPG20 in PDF format

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