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The conditions I use are as follows IN ACCORDANCE WITH PPS23 BEFORE ANY DECISION ON THIS APPLICATION IS MADE, the developer shall undertake an investigation to determine the risk of gas migration from the old landfill site(s) close to the development. The monitoring scheme shall include details of the monitoring techniques and positions and a proposal for monitoring over at least a three-month period but preferably for 6 months. The investigation shall not be undertaken until the scheme has been approved by the Local Planning Authority and must be carried out to its satisfaction. Further advice as to the suitability of the proposed development can then be provided by Environmental Health Services. If the results of the monitoring scheme are satisfactory, a scheme for protection will be required and as a minimum there shall be the provision of a gas proof membrane and passive sub-floor ventilation. Regard must be had to current best practice documents. Following the investigation, it is possible that more extensive remediation works may be required, and the proposed protection measures must be approved by the Local Planning Authority prior to the commencement of construction work. Upon completion of the works, this condition shall not have been deemed as being met until a closure report has been submitted to the Local Planning Authority for approval. The closure report shall include details of the site investigation and the remedial measures that have been undertaken, including photographic evidence, together with the quality assurance scheme. Occupation of buildings shall not commence until the Local Planning Authority has approved the closure report. Gareth Rees Contaminated Land Officer, Harborough District Council, Tel: 01858 821174 -----Original Message----- From: Contaminated Land Management Discussion List [mailto:[log in to unmask]] On Behalf Of Mark Newman Sent: 14 August 2007 10:50 To: [log in to unmask] Subject: Extensions within 250m of landfill..... Hello All, I asked a similar question a while back, but didn't get much of a response. I am getting a lot of planning applciations for extensions/conservatories within 250m of closed landfill sites. I have recently started using the condition: "Prior to commencement of development, a site investigation shall be carried out to include monitoring for methane gas. Monitoring should include sampling for methane, oxygen and carbon dioxide and should be carried out over a period of at least 2 months with a minimum of 8 readings taken - spike testing will not be accepted. The report, together with any recommendations for remedial works, must be submitted to and agreed in writing by the local planning authority. Such remedial works must be carried out prior to commencement of construction works. Prior to the discharge of this condition, details of any remedial measures used shall be submitted to the Local Planning Authority." Am i justified in asking for this, or would the condition below be suitable for these types of applcation: "A gas impermeable membrane should be incorporated within the structure. Any services entering/leaving the structure should be located above the gas impermeable membrane or adequate seals will have to be provided if the membrane has to be breached. Prior to the works commencing, details of the gas impermeable membrane should be submitted to and approved by the LPA." We have very little information regarding gas monitoring in the past, and what we do have is about 15 years old. So i cannot make a reliable judgement about whether or not the site is gassing. It is this uncertainty that makes me want to request gas monitoring each time.... Any input on this would be very gratefully appreciated. Many thanks, Mark (Dover DC) <HTML> ** The contents of this message do not necessarily represent the opinions, views, policy or procedures of Harborough District Council. http://www.harborough.gov.uk - Council Website http://www.harboroughonline.co.uk - Community Portal http://www.lutterworthonline.co.uk - Community Portal ** </HTML>