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Electronic Report 52 Bank Parade Burnley BB11 1TS Phone 01282 414649 / 458410 Our Ref: Park Rd/BB12 8ED/DESK/DL.13 Date: 17th July 2013 Andrew Morgan ADM Design Brook Lea Colne Road Sough Barnoldswick BB18 6TD Tel: 07931 557214 PROPOSED INDUSTRIAL UNIT PARK ROAD, PADIHAM, BB12 8ED PRELIMINARY RISK ASSESSMENT (DESK STUDY) INTRODUCTION It is proposed to build an industrial unit. The objective is to carry out a desk study, supplemented with a walk over survey, to form a Preliminary Risk Assessment to consider contamination and ground gas issues. SITE DESCRIPTION The site is an irregular, almost triangular, shaped yard about 55 by 60 metres. It is located to the east of Park Road in Padiham and centred on National Grid Reference 379150 433460. The site was inspected on 16/7/13 and comprises a predominantly concrete surfaced yard, sloping gently down to the west towards Park Road. Along the east and south sides are bales of plastic and at the southwest corner are storage containers To the north is a plant yard and shed, to the south is an area of allotments, to the west is a vehicle repair garage premises and to the east above the site level, is an currently undeveloped part of the former gas works. There are no notable features or indications of contamination, i.e. tank or operating areas. The site and general area slopes gently to the west at about 1 in 40. 2 PROPOSED DEVELOPMENT It is proposed to build an industrial unit. The existing yard will remain, as existing, for car parking and access with the storage containers also remaining as is. LEGAL/COPYRIGHT Material may be included in this report from Ordnance Survey (Licence No. AL100031635), Landmark, Environment Agency, Coal Authority and others. It may be copyright and the usual restrictions apply. This report can only be relied upon if the invoice has been paid promptly and in full. This report may be signed by an individual, but only on behalf of Worms Eye Limited. This report is referred to as a “Desk Study” but also involves a site inspection. Alternative names for such reports are “Phase I Report” (Phase II being the intrusive work involving boreholes etc.) or a “Preliminary Risk Assessment” (PRA). DATA SOURCES The following data sources have been viewed in compiling this report: • BGS, Geological Map, 1:50000 Series, Sheet 68, Clitheroe, Solid and Dirt Editions. • BGS, On-shore Borehole Scans (none available). • Environment Agency, What’s in your Backyard? - Ground Water - Landfill Sites - Pollution Incidents • Ordnance Survey, Historical Mapping, 1:2500 and 1:10000 scale. • Walkover Survey, 16/07/13 ENVIRONMENTAL DATA A Landmark Envirocheck report has been obtained for the site and geological maps have been reviewed, the following is a summary of the combined data. The Envirocheck report indicated none of the following within 250 metres: • Contaminated land register entries • Water abstraction points • Source protection zones • Radioactive sites • Hazardous substances sites • Fuel stations • Sensitive land uses 3 Geology of Site The geological map indicates that a geological fault, with the down throw to the northeast, runs northwest to southeast across the site. Southwest of the fault are sandstone of the Dandy Rock horizon and to the northeast are undefined strata, likely to be mudstone and shale, both in the Pennine Lower coal measures. Surface drift is shown as glacial till (boulder clay) of unspecified thickness with an area of alluvium immediately to the west. Surface Water (Hydrology) The River Calder, GQA grade D (fair), flows south 55 metres to the west. The nearest discharge consent was for cooling water to enter the river 129 metres west.* There was a minor pollution incident 37metres northwest of partially burned pallets in the River Calder 1997.* In 1991 there was a significant pollution incident of oil in the River Calder, 115metres north.* The EA maps show an area of extreme flooding from the River Calder 14metres southwest and an area of ‘normal’ flooding 16metres southwest, i.e. clear of the site and about 60metres southwest of the proposed building. The area slopes down to the west and the flow of surface water is expected to be in this direction. * not relevant due to distance/severity/significance Groundwater (Hydrogeology) The solid rocks and superficial drift deposits under the site are indicated as Secondary A (formerly minor) aquifers. The surface soils are also shown as having a low permeability. Groundwater flow is likely to follow the topography and move to the west towards the river. 4 Landfill and Other Waste Sites The site itself is shown as a landfill site, filled by British Gas between 31st December 1987 and 8th March 1989. The EA indicates deposited waste was Inert Waste (cement, ceramics, glass, metals, slate, concrete, brick, soil, clay, sand, plastics, timber), this is likely to be the former gas holder excavations. 9 metres south of the site on Elizabeth Street another Landfill site is recorded, the waste material and date of the deposit is unknown. 74 metres south west of the site another landfill site (Padiham Power Station) is recorded and the deposited waste include inert, industrial and household waste. The site was previously licensed as a Household Waste Management Facility (licensed for car batteries, general household/commercial/industrial waste, household chemicals, mineral oil, household solvents, bonded asbestos) between 1993 and 2003. 21 metres north is a registered Vehicle Dismantlers, actually located over 50metres north* * not relevant due to distance/severity/significance Radon The site is in a lower probability radon area as less than 1% of homes in the area are above the radon action level. Radon protection measures are not required. Nearby Industry The nearest trade directory is a Recycling Centre 6metres northwest and is now inactive. Other nearby industries include: • Skillings Crushing Co, 4metres north, have two LA PPC listings for mobile screening and crushing processes. • Garages Services, 17metres west, active. • Recycling Centre, 37metres north, inactive.* • Pallets, Crates and Packing Cases, 43metres north, active.* • Commercial Vehicle Dealers, 54metres north, active.* • Garage Services, 58metres, north, active.* • Waste Disposal Services, 70metres north, inactive.* * not relevant due to distance/severity/significance 5 SITE HISTORY Date On Site Off Site River Calder 55m to the west. 1848 Site undeveloped field Padiham Green 240m to east. 1:10560 Undeveloped fields surround the site. Railway on embankment, 100m north and sidings 100m northeast. 1893 Site developed with a gasometer central on Railway Station 225m notheast. 1:2500 the site Houses constructed 125m southeast. Stream 100m south. Refuse Destructor 25m west. 1912 Road constructed around site. Mare park 1:2500 road. Building by northwest corner of site. Mortuary 25m west. Gas works buildings, immediately north of site. 1931 Little or no change Gasometer 30m northeast and tanks 10 and 20m north. 1:2500 Allotment gardens to the south, spreading southeast of site. Council depot 10m west. Destructor to west now show as works. 1960 Little or no change 1:2500 New buildings along west side of depot 40m west. 1969 Little or no change Little or no change 1:2500 Railway sidings to northeast is now a works. Railway line no longer active. 1993 Gasometer removed, excavation filled and 1:2500 site now household waste disposal centre Gas works building to the north demolished. Council depot to the west now a builders yard. Gasometer to the northeast removed. 2013 Site now vacant 1:10000 Small buildings constructed immediately north. DISCUSSION Contamination The site is currently a concrete/tarmac yard but was previously part of the gas works and contamination is expected. High levels of contamination are generally anticipated from gas works, especially hydrocarbons. The former household waste centre and current storage are not expected to have generated or introduced higher levels of contamination than the gas works. The yard preventing contaminants from reaching the underlying soils in significant quantities. 6 Regarding offsite industries, contaminants from those to the west would be expected to migrate to the west, down the hydraulic gradient and away from the site. Contaminants from the demolition construction to the north would be from storage/repair to vehicles and would not be expected to present as large a risk to the site as the gas works, most contaminants also migrating down to the west and away from the site. Similarly, contaminants from the area of the gas holder to the east, although likely to pass beneath the site, would be expected to be similar, if not the same, to those generated on site. The proposed development will be an industrial unit and yard. End-users will not have direct contact with the surface soils and potential pollutant linkages are: • Inhalant of vapours. • Direct contact with building. • Contaminants affecting service pipes. Although high contamination levels are expected, by being full hard surfaced only a moderate risk to end-users is expected. This being from inhalation of vapours and contaminants affecting drinking water pipes. Controlled Waters There is an underlying Secondary A aquifer beneath low permeability clay. The River Calder is 55 metres west. On completion, the building and car parking areas will cover the site thereby eliminating the risk of rainwater passing through the surface soils. If the site remains as a yard and building with no landscaping the risk to controlled water will remain as now. The anticipated underlying clay will also impede the migration of water and, on completion, only a low to medium risk is expected to controlled waters. It should also be remembered that the site is a small part of a wider industrial area where levels of contaminants are likely to be similar and, risks to controlled waters is greater in open areas.