Electronic Report 52 Bank Parade Burnley BB11 1TS Phone 01282 414649 / 458410 Our Ref: Talbot St/BB10 2HW/2017 Date: 19 July 2017 Steven Hartley Hartley Planning and Development Associates Swallow Barn Lower Chapel Hill Hurst Lane Rawtenstall BB4 8TB WALSHAW MILL, TALBOT STREET, BRIERCLIFFE, BURNLEY. BB10 2HW PRELIMINARY RISK ASSESSMENT (DESK STUDY) INTRODUCTION A residential development is proposed. The objective is to carry out a desk study, supplemented with a walk over survey, to form a Preliminary Risk Assessment to consider contamination, landfill gas and geotechnical issues. SITE DESCRIPTION The site is an almost rectangular plot, about 137 by 126 metres, located to the southwest of Talbot Street in Briercliffe and at OS Grid Reference 386492, 434915. A limited inspection on 4/7/17 by Mr S Gimeno (Geotechnician) showed the site to comprise a former cotton mill, now used for pharmaceutical manufacture, with yards to the east and south and a grass field to the west. The main building was a north light weaving shed and joined to the south was stone built with extensions and alterations. To the west was a portacabin style hard roof office probably built of timber. Just north was a fenced compound for aircon condenser units. In the southeast corner was a stone built electrical substation. In the northeast corner was a gas regulator box/building. An oil drum with hand pump was seen in the southeast corner. This is a residential area with houses on all sides, including gardens to the north, southeast and southwest. The area slopes down to the southwest at about 1 in 25. 2 TREES The main trees were a screening line of leylandii conifers running along the south boundary. Elsewhere there were occasional trees, five fronting Talbot Street in the northeast. This is not an accurate arboricultural survey. PROPOSED DEVELOPMENT It is proposed to build fifty-two houses. These comprise thirty-six three bedroom townhouses, fourteen three bedroom semi-detached houses and two four bedroom detached houses all with gardens. There will be a landscape feature in the centre of the site, and a public open space to the east. 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. NOT INCLUDED IN THE REPORT Arboricultural Survey. Asbestos Survey Invasive Plant Survey (Japanese Knotweed etc). Mining Risk Assessment. River/Tidal Flood Risk Assessment. Surface Water Flooding. Underground Services Survey. General comments may be made with regards to the above where there are obvious features seen on site, in the data review or where they are applicable to the environmental and geotechnical risk assessment. These general comments do not constitute a detailed risk assessment. 3 DATA SOURCES The following data sources have been viewed in compiling this report. BGS, Geology Map, 1:50000 scale, Solid and Drift Edition Coal Authority Interactive Mapping Landmark Envirocheck Report, 4/7/17 Ordnance Survey, Historical Maps, 1:10000 and 1:2500 scale 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 Substantiated pollution incidents Source protection zones Radioactive sites Areas of flooding from rivers Hazardous substances sites Fuel stations Sensitive Lane Uses (other than nitrate vulnerable zone) Geology of Site The geological map indicates that the underlying solid rocks are sandstone of the Dandy Rock horizon beneath the east of the site and mudstone beneath the west, these in the Pennine lower coal measures formation and dipping to the west. Surface drift is shown as glacial till (boulder clay) of unspecified thickness. Natural subsidence hazards are shown as very low to no hazard. Mining The Coal Authority Interactive Mapping shows: West and southeast of the site is in a Development High Risk Area. Coal seam outcrops northwest to southeast on site and dips to the west. West of the site is underlain by probable shallow workings. Two mine shafts are shown about 10 metres southeast, with other shafts further afield. As a minimum a Coal Mining Risk Assessment report is required. 4 5 Surface Water (Hydrology) The nearest surface water feature is a stream 174 metres south, entering the River Don about 600 metres south. The nearest discharge consents are: 235 metres east, cooling water to freshwater stream/river, in 2002 *. There are two pollution incidents to surface water listed within 250 metres: 215 metres north, minor incident, other sewage to unknown receiver in 1995 * 227 metres southeast, minor incident, unknown pollutant to unknown receiver in 1993 *. There are the following surface water abstraction points nearby: 225 metres east, abstraction for other industrial/commercial/public services: boiler feed. 225 metres east, abstraction for other industrial/commercial/public services: general use. The area slopes down to the south and the flow of surface water is expected to be in this direction. * Not relevant due to distance/severity/significance Groundwater Flooding The site is shown to be in an area with: Limited potential for groundwater flooding to occur (east of site). Potential for groundwater flooding to occur at the surface (south corner). Potential for groundwater flooding of property situated below ground level (northwest of site). Flooding From Rivers and Seas The site is shown to be clear of flooding from rivers and seas. Surface Water Flooding The northeast boundary is shown to be at risk of 1 in 30 year surface water flooding, with a wider area on the northeast side at risk of 1 in 100 year flooding. Groundwater (Hydrogeology) The solid rocks under the site are indicated as a Secondary A aquifer. Superficial (drift) deposits are classed as an Undifferentiated aquifer. Groundwater flow is likely to follow the topography and move to the south. 6 Landfill Sites There are two historical landfill sites listed within 250 metres as follows: 123 metres northeast, deposited waste included inert waste, last input date not supplied. 163 metres east, deposited waste, included inert waste, last input date not supplied. Filled Ground Within 250 metres of the site there are the following suspected filled features: On the east of site. 192 metres east. 199 metres northeast. 240 metres east. 244 metres northeast. 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 There are fifteen Trade Directory entries within 200 metres: Pharmaceutical manufacturers and distributors on the north of site, inactive. 28 metres southwest, gate manufacturers, inactive. 56 metres southwest, commercial cleaning services, active * 106 metres northeast, carpet, curtain and upholstery cleaners active *. 123 metres east, industrial engineers, inactive *. 135 metres southeast, road haulage services, inactive *. 132 metres north, car body repairs, inactive * 142 metres northeast, engineers, general, active *. 142 metres northeast, classic car specialists, inactive *. 142 metres northeast, tent manufacturers, inactive *. 142 metres northeast, recycling centres, inactive *. 142 metres northeast, garage services, active *. 143 metres northeast, furniture manufacturers, home and office, inactive * 167 metres northeast, metal products, fabrication, active *. 196 metres northeast, home furnishings manufactures, inactive *. * not relevant due to distance/severity/significance 7 SITE HISTORY Date On Site Off Site 1848 Mostly on undeveloped field with Coal Pit. Poor unclear mapping but mostly undeveloped. 1:10,560 House towards southwest corner. Barn 25 metres east. Cotton mill 120 metres northeast. 1893 Stream runs northwest – southeast on Briercliffe cotton mill 110 metres northeast. 1:2,500 northeast of site. Vicarage 110 metres east. Grave yard 150 metres east. Residential area 35 metres northeast. Coal pit house no longer present. Stream not present, presumed to enter Stream10 metres south flows southwest. reservoir. Saw mill immediately north. 1912 Cotton mill in centres off site, with chimney Housing 30 metres northwest. 1:2,500 on north side and probable boiler house at Primrose Mill 100 metres southeast. southeast corner. Queen Street Mill 175 metres east. Reservoir on east of site. Reservoir 165 metres and 205 metres southeast. Reservoir on northeast corner, 1931 Three unknown buildings on southwest of Houses 10 metres northeast. 1:2,500 site. Allotment immediately south. Three unknown buildings no longer present. 1962 Saw mill to north shown as works. Allotment on northwest of site. 1:2,500 Garage 10 metres northwest. Sub-station southeast corner. Reservoir to northeast filled. 1977 – 1978 Both reservoirs have been filled. Housing now surrounding the site. 1:1,250 Garage colony to north. 1993 Hut on northwest corner of site. Reservoir to northeast and southeast, filled. 1:1,250 2017 No relevant change No relevant change 1:10,000 The surface water flood map suggests a stream may have run close to the northeast boundary on-site, prior to the mill