Natural Resources Wales. St Asaph FRMS (PAR) Ground Investigation Factual Report. January creative minds safe hands

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1 Natural Resources Wales t Asaph FRM (PAR) Ground Investigation 01 Factual Report January th Floor, Longcross Court, 7 Newport Road, Cardiff, CF 0A Tel enviro.cardiff@wyg.com creative minds safe hands

2 t Asaph FRM ocument Control Project Client Job Number File Origin t Asaph Flood Risk Management cheme Natural Resources Wales A089 \\CARIFF1\dataold\Environmental\projects\A089 - t Asaph FRM\Report ocument Checking Prepared by Nicholas ool Geo-environmental Engineer igned Gemma Cauchi Graduate Geo-environmental Engineer Reviewed by Chris Pugh Associate irector igned Issue ate tatus 1 ecember 01 raft January 015 Final A089 January 015

3 t Asaph FRM Contents Page 1.0 INTROUCTION INTRUCTION RIEF REPORT COPE LIMITATION ITE INFORMATION LOCATION ITE ECRIPTION GEOLOGY AN HYROGEOLOGY ITE INVETIGATION GROUN CONITION ENCOUNTERE TRATA ENCOUNTERE GROUNWATER IN ITU TETING LAORATORY TETING GEOTECHNICAL TETING ENVIRONMENTAL TETING FIGURE Figure 1 Figure Figure ite Location Plan ite Investigation Layout Plan PT N values vs. epth Plot APPENICE APPENIX A REPORT CONITION APPENIX EXPLORATORY HOLE LOG, KETCHE AN PHOTOGRAPH APPENIX C FALLING HEA TET REULT APPENIX GEOTECHNICAL LAORATORY TETING REULT APPENIX E ENVIRONMENTAL LAORATORY TETING REULT APPENIX F GROUNWATER MONITORING ATA A089 January 015

4 t Asaph FRM 1.0 INTROUCTION 1.1 Instruction WYG Environment Planning Transport Ltd (WYG) were commissioned by National Resources Wales (NRW) to undertake intrusive ground investigation work at the t Asaph Flood Risk Management cheme (t Asaph FRM) site. Contract instructions to proceed were included in an from Abbey owning dated nd eptember 01 (ref IMWA00110). 1. rief The aim of the ground investigation is to provide sufficient ground information for an outline scheme design to inform the business case for a proposed flood defence improvement scheme (PAR). The flood defence scheme is likely to comprise raising and widening existing flood defence embankments and may also include the construction of new defences set-back from the river s edge. The scope of the site investigation works was devised by NRW s Engineering Consultant, lack & Veatch and detailed in the t Asaph FRM Main GI Works Package Order. In summary, the scope comprised the following key elements 7 No. Cable percussive boreholes to a maximum depth of 10m. 18 No. Windowless sample holes with supplementary dynamic probe holes to a maximum depth of 5m. 8 No. mechanically excavated trial pits to a maximum depth of m. In situ testing including standard penetration tests, hand shear vane and falling head testing. Collection of disturbed and undisturbed soil samples Collection of groundwater samples Geotechnical and chemical laboratory testing of soil and groundwater samples. Preparation of a Factual Report. 1. Report cope This report summarises the work undertaken and includes the following key elements A089 January 015

5 t Asaph FRM Full factual records of the site works carried out Ground conditions encountered In-situ test results Geotechnical and chemical laboratory test results 1. Limitations This report has been prepared in accordance with the requirements of National Resources Wales. It is subject to the report conditions contained in Appendix A. The information contained in this report is intended for the use of National Resources Wales. WYG can take no responsibility for the use of this information by any third party or for uses other than that described in this report. 5 A089 January 015

6 t Asaph FRM.0 ITE INFORMATION.1 Location The site comprises the embankments that run along the eastern and western banks of the River Elwy as it flows south to north through the city of t Asaph. The National Grid Reference (NGR) for the northern extent of the site is 1560E, 19150Nand the NGR for the southern extent of the site is 5880E, N.. ite description ue to the scale of this urban site, individual investigation positions were located in a variety of environments, including recreational grounds and sports fields; rural areas; public footpaths; river banks; and private land. Permission to access to local council sites, private properties and agricultural land was sought prior to the commencement of work by Natural Resources Wales.. Geology and Hydrogeology The G geology mapping (one-inch to one-mile sheet 107 enbigh) indicates the bedrock underlying the site comprises the Warwickshire Group, which includes mudstones, siltstones and sandstones. The Warwickshire Group is classified as a econdary A Aquifer. The published geology indicates that the bedrock is overlain by superficial deposits including Alluvium, Glaciofluvial deposits and evensian till. The till is described as diamicton meaning poorly sorted deposits that contain a wide range of particle sizes. The Alluvium and Glaciofluvial deposits are also listed as econdary A Aquifers. The information provided as part of the Works package Order highlighted that made ground will also be present primarily comprising the materials used to construct the existing embankments. There are no ource Protection Zones (PZs) within a 1 km radius of the site. The groundwater vulnerability in the area is listed as being intermediate to high. 6 A089 January 015

7 t Asaph FRM.0 ITE INVETIGATION The site investigation was undertaken between the 6 th and 17 th October 01. etails of the fieldwork methods used are given in the Notes section at the end of this report. The scope of the completed investigation is given below 6 No. Cable percussive boreholes designated H01 to H05 and H07 to depths ranging between 5.0 and 10.0m. 5 No. Machine excavated trial pits designated TP1 to TP6 to depths ranging between 1.0m to.1m. 18 No. Windowless sampling holes designated W01 to W18 to depths ranging between 1.0m to of 6.0m No. Hand excavated pits designated HP0, HP07, HP08 and HP09. In situ testing including standard penetration tests, hand shear vanes and falling head tests. Collection of disturbed and undisturbed soil samples Geotechnical and chemical laboratory testing of soil samples The following variations to the planned scope of works were agreed with the Engineer s representative during the fieldworks H06 was replaced with W17 due to access constraints associated with the original position. The original position of W17 was replaced with a hand excavated pit (HP09) due to access constraints. TP0, TP07 and TP08 were replaced with hand pits due to access constraints. Figure shows the layout of the exploratory holes advanced during the site investigation. Exploratory hole logs including photographic plates and sections of exposed structures are presented in Appendix. 7 A089 January 015

8 t Asaph FRM.0 GROUN CONITION ENCOUNTERE.1 trata encountered In order to provide a concise strata summary it is necessary to broadly group strata observation data according to investigation methods and investigation targets. Across the entire t Asaph FRM site the sequence of strata encountered can be generalised as Topsoil, Made Ground (bund material), Made Ground Alluvium, Fluvio-glacial eposits, Glacial Till In the following tables GL denotes Ground Level, * indicates that the base of stratum was not proven, - denotes the strata was not encountered. Five machine dug trial pits were advanced adjacent to the existing flood bund to identify the interface between the interface between the Alluvium and the Fluvioglacial eposits. Table 1 ummary of trata for the Machine Pits Pit Topsoil Made Ground Alluvium Fluvioglacial eposits TP01 GL * TP0 GL * TP0 GL * TP05 GL * TP06 GL * *ase of stratum not proven Four hand dug pits were advanced to investigate the existing flood defence bund and flood defence measures; Table provides a summary of strata encountered in these pits. 8 A089 January 015

9 t Asaph FRM Table ummary of trata depths for Hand ug Pits Pit Topsoil Made Ground Made Ground (und material) HP0 - - GL 1.0* HP GL 1.0* HP GL 0.75* HP09 GL * - *ase of stratum not proven Eighteen windowless sample boreholes were advanced to investigate the existing flood defence bund and adjacent ground conditions; Table provides a summary of strata encountered in these pits. Table ummary of trata depths for Windowless ample oreholes Made Ground Fluvioglacial orehole Topsoil Made Ground Alluvium (und material) eposits W01 GL * W0 GL * W0 GL * W0 GL * W05 GL * W06 GL * W07 GL * W08 GL * W09 GL * W10 GL * W11 GL * W1 GL * W1 GL * W1 GL # - - W15 GL * W16 GL W17 GL * W18 GL * *ase of stratum not proven # Window sample refused 9 A089 January 015

10 t Asaph FRM ix cable percussion boreholes were advanced to investigate the existing flood flood bund and adjacent ground conditions; Table provides a summary of strata encountered in these pits. Table ummary of trata depths for Cable Percussion oreholes orehole Topsoil Made Ground (und material) Made Ground Alluvium Fluvioglacial eposits Glacial Till H01 GL * H0 GL * H0 - - GL * H0 GL * H05 GL * H07 GL * *ase of stratum not proven etails of each stratum are discussed in the subsequent sections below. 10 A089 January 015

11 t Asaph FRM.1.1 Topsoil Twenty nine investigation positions encountered topsoil. This is generally described as consisting of dark brown to red brown, slightly sandy silt. The topsoils are frequently described as containing subordinate gravel fractions and plant roots or rootlets..1. Made ground und material Each window sample position (except for W1, W1, W15, W16 and W18) encountered the flood bund material. It was generally described as soft to very stiff, brown silty slightly sandy to sandy clay with fine to coarse grained angular to sub-rounded gravels consisting of mainly subordinate mudstones, sandstones and siltstones..1. Made ground Almost every position encountered material described as made ground. There was a wide range of materials encountered in the made ground; on the drilling of a number of holes in the town centre areas of historic landfill were also encountered. The general made ground material found was described as brown and black clays, silts, sands and gravels of sandstone. Thirteen investigation positions (H, H5, H7, TP06, HP07, W10 W17) encountered landfill material which is a highly variable mixture of black, brown, locally orange sandy with fine to coarse angular to sub-angular gravel and cobbles. The gravel and cobble material identified includes, but is not limited to ash; slag; building materials (including asbestos containing materials); ceramics; pottery; glass; metals; plastics and coal..1. Fluvioglacial eposits Fluvioglacial eposits were encountered in twenty eight positions. The base of the Fluvioglacial eposits was only encountered within the cable percussive boreholes at depths of. to 7.10m bgl. The deposits are generally described as being brown, clayey, silty, sandy, rounded to angular sandstone and mudstone gravel with occasional cobbles. ensities of the granular Fluvioglacial eposits, as determined from the PT data, have been assessed as loose to very dense typically increasing with depth..1.5 Glacial Till Glacial Till was encountered in all cable percussion borehole positions during the investigation. The deposits consisted of red brown occasionally mottled grey silty sandy gravelly clay with gravels consisting of 11 A089 January 015

12 t Asaph FRM subordinate sandstone, mudstone and siltstone. The strength of the cohesive Glacial Till, as determined from the PT data, have been assessed as firm to hard typically increasing with depth. 1 A089 January 015

13 t Asaph FRM. Groundwater..1 Groundwater during investigation Groundwater strikes were recorded in all six boreholes occurring within the Fluvioglacial eposits. No groundwater strikes were recorded in the windowless sample holes, trial pits or hand dug pits. The groundwater data is summarised in Table 5 below. Table 5 ummarised Water trike ata Position Water strike Residual water Time after (m bgl) level (m bgl) strike (mins) trata H Fluvioglacial epostis H Fluvioglacial epostis H Fluvioglacial epostis H Fluvioglacial epostis H Fluvioglacial epostis H Fluvioglacial epostis.. Groundwater monitoring In each of the boreholes groundwater monitoring leveloggers were installed within the monitoring pipes to provide accurate and continuous data on the groundwater levels. The first batch of data has been downloaded and is available on a C in Appendix F. The table below summarises the data available. Table 6 ummarised Water Monitoring ata Position Minimum groundwater Maximum groundwater level (m bgl) level (m bgl) trata H Fluvioglacial epostis H Fluvioglacial epostis H0 Not installed Fluvioglacial epostis H0.8.7 Fluvioglacial epostis H Fluvioglacial epostis H Fluvioglacial epostis 1 A089 January 015

14 t Asaph FRM. In itu Testing..1 Falling Head Testing oak away tests were conducted at the six cable percussive borehole positions. Testing at, H0, H05 and H07 were abandoned as it was not possible to fill the hole with water due to a very high infiltration rate. A permeability test was not carried out in H0 due to the presence of potential contamination in the Fluvioglacial eposits. The results are presented in Table 7 below and the detailed data and calculations are included in Appendix C. Table 7 Falling Head Results Position Test oil Infiltration Rate tratum epth of Casing epth of orehole (m/s) H x 10-5 Fluvioglacial eposits H0 1. x 10-5 Fluvioglacial eposits H0 1 No Test Undertaken Fluvioglacial eposits - - H0 1 Failed Fluvioglacial eposits.0.00 H05 1 Failed Fluvioglacial eposits H07 1 Failed Fluvioglacial eposits Hand hear Vane Testing Hand shear vane testing was conducted on any cohesive material encountered during excavation. Table 8 summaries averaged shear vane results. 1 A089 January 015

15 t Asaph FRM Table 8 Average Hand hear Vane Results Position epth trata hear trength (kn/m ) Remoulded hear trength (kn/m ) W01 1. MG W MG W01. ALUV W0 0.5 MG W0 1.0 MG W0 1.5 MG W0.0 MG W0.5 MG W0 1. MG W0 1.8 MG W0. MG W0.5 MG W0 0. ALUV W05 1. MG W MG W05. MG W07. MG W07.6 MG W07.9 ALUV W07. ALUV W ALUV W MG W MG W10.9 ALUV W MG W17 0. MG W MG W17 1. MG W MG W MG tandard Penetration Testing tandard Penetration Tests (PT) were undertaken within the boreholes, the results are summarised in, presented on the borehole logs in Appendix and plotted in Figure. 15 A089 January 015

16 t Asaph FRM 5.0 LAORATORY TETING 5.1 Geotechnical Testing A programme of laboratory testing was carried out on samples taken from the various strata encountered during the site investigation. Geotechnical testing was scheduled by Arup and by GTL Ltd, an approved supplier in accordance with the requirements of WYG quality system and are UKA accredited for a range of geotechnical tests. The test procedures used were generally in accordance with the methods described in etails of the specific tests used in each case are given in Table 8. Laboratory geotechnical test results are given in Appendix. Table 9 ummary of Geotechnical Tests Test tandard ( ) No Moisture Content Part, Clause. 18 Point Liquid and Plastic Limit Part, Clause. & Particle ensity by Pykonometer Part, Clause 8. 6 P Wet ieve Method Part, Clause P edimentation by hydrometer Part, Clause Quick Undrained Triaxial Compression Test 100mm Part 8, Clause 7.0 diameter samples ph Part, Clause ulphate Content of Acid Extract Part, Clause ulphate Content of Water Extract Part, Clause ulphide Content Part, Clause 5.0 Constant Head Permeability Test 5. Environmental Testing The environmental chemistry of the ground was investigated by specialist chemical analysis of selected soil samples carried out by Jones Environmental Forensics Ltd, which is an approved supplier in accordance with the requirements of WYG quality system and is UKA accredited for a range of chemical analyses. The test procedures used were generally in accordance with the methods described in etails of the specific tests used in each case are given in Table 11. ue to the final schedule being received late by the laboratory some of samples have deviated. The test result certificates and any deviations are included in Appendix E. 16 A089 January 015

17 t Asaph FRM Table 10 ummary of Environmental Testing Test No Metals 10 PAHs 7 TPH CWG 7 EPH 7 PC 1 Phenol 7 Water oluble ulphate 1 Total ulphate 1 ph A089 January 015

18 t Asaph FRM 1. tandards NOTE All boring operations, sampling of soils, in situ testing and geotechnical laboratory testing have been carried out in accordance with the recommendations of the ritish tandards 590+A (010) (1), 177 (1990) () and (001) (). oil and rock descriptions follow the recommendations of 590+A. Where descriptions or classifications are based on other documents (e.g. 800 (1986) or CIRIA Project Report 11 (199)), this is stated in the report text.. ite methods Unless specifically stated otherwise, the following methods are used for exploratory holes. Holes described as cable percussive are bored using a light cable percussive rig. tandard penetration tests are carried out where appropriate, as shown in the logs. isturbed and undisturbed samples are taken from the exploratory holes at the depths on the records. Window sampling generally uses the windowless sampling method, using a tracked Geotool. ynamic probes are usually heavy dynamic probes, using the same tracked Geotool used for window sampling.. efinitions and abbreviations The following terms are used in the exploratory hole logs amples In situ tests U Undisturbed 10mm dia. sample tandard penetration test (PT) TW Thin Walled undisturbed 10mm dia. sample N PT N value (blows/00mm) ulk sample HP Hand penetrometer shear strength mall disturbed sample V Hand shear vane shear strength W Water sample VOC Volatile organic compounds (ppm) CR California earing Ratio test or CR value obtained from Mexiprobe test PI Photo-ionisation detector used to detect the presence of VOCs. Core recovery and rock quality Rotary drilling sizes TCR Total core recovery (%) Nominal diameter (mm) CR olid core recovery (%) Index letter orehole Core RQ Rock quality designation (%) N 75 5 FI Fracture index H NR No recovery P 10 9 NI Not intact Water strikes Level of water strike Water level rose to this level (see Remarks at foot of log for details) epth means depth below existing ground level unless otherwise specified. Values specified in soil descriptions given in the exploratory hole logs are depths unless otherwise specified. 18 A089 January 015

19 t Asaph FRM Figures A089 ecember 01

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22 PT N value - blows epth - m Made Ground Alluvium Fluvioglacial eposits Glacial Till WYG Environment Ltd Project rawing Title Longcross Court, Newport Rd, Cardiff, CF 0A Tel Fax t Asaph Client NRW rawing No. PT vs epth Plot Environmental Consultancy FIGURE

23 t Asaph FRM Appendices A089 ecember 01

24 t Asaph FRM Appendix A Report Conditions A089 ecember 01

25 t Asaph FRM APPENIX A - REPORT CONITION GROUN INVETIGATION This report is produced solely for the benefit of Natural Resources Wales and no liability is accepted for any reliance placed on it by any other party unless specifically agreed in writing otherwise. This report refers, within the limitations stated, to the condition of the site at the time of the inspections. No warranty is given as to the possibility of future changes in the condition of the site. This report is based on a visual site inspection, reference to accessible referenced historical records, information supplied by those parties referenced in the text and preliminary discussions with local and tatutory Authorities. ome of the opinions are based on unconfirmed data and information and are presented as the best that can be obtained without further extensive research. Where ground contamination is suspected but no physical site test results are available to confirm this, the report must be regarded as initial advice only, and further assessment should be undertaken prior to activities related to the site. Where test results undertaken by others have been made available these can only be regarded as a limited sample. The possibility of the presence of contaminants, perhaps in higher concentrations, elsewhere on the site cannot be discounted. Whilst confident in the findings detailed within this report because there are no exact UK definitions of these matters, being subject to risk analysis, we are unable to give categoric assurances that they will be accepted by Authorities or Funds etc. without question as such bodies often have unpublished, more stringent objectives. This report is prepared for the proposed uses stated in the report and should not be used in a different context without reference to WYGE. In time improved practices or amended legislation may necessitate a re-assessment. The assessment of ground conditions within this report is based upon the findings of the study undertaken. We have interpreted the ground conditions in between locations on the assumption that conditions do not vary significantly. However, no investigation can inspect each and every part of the site and therefore changes or variances in the physical and chemical site conditions as described in this report cannot be discounted. The report is limited to those aspects of land contamination specifically reported on and is necessarily restricted and no liability is accepted for any other aspect especially concerning gradual or sudden pollution incidents. The opinions expressed cannot be absolute due to the limitations of time and resources imposed by the agreed brief and the possibility of unrecorded previous use and abuse of the site and adjacent sites. The report concentrates on the site as defined in the report and provides an opinion on surrounding sites. If migrating pollution or contamination (past or present) exists further extensive research will be required before the effects can be better determined. A089 ecember 01

26 t Asaph FRM Appendix Exploratory Hole Logs, ketches and Photographs A089 ecember 01

27 WYG ENVIRONMENT Ground Engineering ervices 5th Floor, Longcross Court, 7 Newport Road, Cardiff, CF 0A. Tel , Fax Project t Asaph FRM Project Number A089 Client Natural Resources Wales Method Cable Percussive Rig Co-ordinates E N Red brown silty CLAY with many roots and rootlets (TOPOIL) ry and friable brown silty slightly gravelly CLAY. Gravel of fine to medium sub-rounded to rounded sandstone (UN - MAE GROUN) rown silty slightly gravelly CLAY. Gravel of fine angular to rounded sandstone, mudstone and brick (POILE UN - MAE GROUN) Red brown silty sandy very gravelly CLAY. Gravel of angular to rounded sandstone, mudstone and brick. (MAE GROUN) Ground Level 1.91m AO Hole Information From To Method iameter 0.00m 1.0m Legend 1.0m 10.00m Reduced Water Level epth Casing Level (mao) Hand Tools Cable Percussive Rig orehole Number - 150mm H1 Final Installation/ ackfill cale 150 heet 1 of 1 Logged y Checked y tart ate Finish ate ampling & In itu Testing epth Type Number E U NE CP 07/10/1 08/10/1 9 lows=0 blows for 00mm E N=1 (1,,,,,).50 Firm brown clayey sandy ILT (ALLUVIUM) N=8 (,,6,6,6,10) ense brown silty sandy rounded to angular fine to coarse mudstone and sandstone GRAVEL (FLUVIO-GLACIAL EPOIT) N=9 (10,7,9,1,1,1) Medium dense brown sandy angular to rounded fine to coarse sandstone, mudstone and quartz GRAVEL. (FLUVIO-GLACIAL EPOIT) W N=8 (1,1,8,8,6,6) 5.50 tiff red brown sandy very gravelly CLAY. Gravel of fine to medium rounded to sub-rounded sandstone. (GLACIAL TILL) N=17 (,,,,,8) N=6 (6,7,9,10,1,1) Very stiff red brown sandy very gravelly CLAY. Gravel of fine to medium rounded to sub-rounded sandstone. (GLACIAL TILL) /95mm (8,9,10,11,1,15) N=6 (7,8,10,10,1,1) 9.50 orehole complete at m bgl. Observations / Remarks. 1. Inspection pit hand excavated to 1.m bgl prior to drilling.. Groundwater observed at.5m bgl, rising to.m bgl. At.m bgl at start of second day.. ackfilled with bentonite from 10.0m bgl to 6.00m bgl, 50mm slotted pipe with gravel surround from 6.00m bgl to.00m bgl, 50mm plain pipe with bentonite surround from.00m bgl to ground level.. Falling head test conducted within borehole. Chiselling Groundwater Time From To Time truck Rising to (mins).0m.50m 0 mins.50m.0m m 7.00m m 7.50m m 150mm 60 mins 60 m mins N=9 (,7,10,11,1,1) Remarks

28 WYG ENVIRONMENT Ground Engineering ervices 5th Floor, Longcross Court, 7 Newport Road, Cardiff, CF 0A. Tel , Fax Project t Asaph FRM Project Number A089 Client Natural Resources Wales Method Cable Percussive Rig Co-ordinates 00.96E N rown clayey sandy gravelly ILT with many roots and rootlets (TOPOIL) oft to firm brown silty sandy gravelly CLAY. Gravel of fine to medium sub-angular to rounded sandstone, siltstone, mudstone and brick (UN - MAE GROUN). Ground Level 1.17m AO Hole Information From To Method iameter 0.00m 1.0m Legend 1.0m 8.00m Hand Tools Cable Percussive Rig Reduced Water Level epth Casing Level (mao) orehole Number - 150mm H Final Installation/ ackfill cale 150 heet 1 of 1 Logged y Checked y tart ate Finish ate ampling & In itu Testing epth Type Number E NE CP 09/10/1 09/10/ U lows= E U lows= U lows=5 ense to medium dense brown clayey silty sandy rounded to sub-rounded mudstone and sandstone GRAVEL & COLE (FLUVIO-GLACIAL EPOIT) N=1 (8,8,8,6,9,8) W N=1 (5,6,,,,) N=18 (,,6,,,) 6.50 tiff red brown very gravelly CLAY. Gravel fine to coarse rounded to sub-angular sandstone and mudstone. (GLACIAL TILL) N=8 (,,6,6,8,8) m 150mm N=18 (,,,5,,5) orehole complete at 8.5 m bgl Observations / Remarks. 1. Inspection Pit hand excavated to 1.m bgl prior to drilling.. Groundwater observed at.8m bgl rising to.6m bgl. At.5 at start of second day.. ackfilled with bentonite from 8.00m bgl to 6.00m bgl, 50mm slotted pipe with gravel surround 6.00m bgl to.00m bgl, 50mm plain pipe with bentonite surround from.00m bgl to ground level.. Falling head test undertaken within borehole. Chiselling Groundwater Time From To Time truck Rising to (mins) Remarks.50m 5.00m 60 mins.80m.60m 0 eeping 6.50m 7.00m 60 m mins

29 WYG ENVIRONMENT Ground Engineering ervices 5th Floor, Longcross Court, 7 Newport Road, Cardiff, CF 0A. Tel , Fax Project t Asaph FRM Project Number A089 Client Natural Resources Wales Method Cable Percussive Rig Co-ordinates 05.00E N Grey sandy coarse angular limestone GRAVEL. (MAE GROUN) m clear PM Grey clayey sandy ILT. (ALLUVIUM).... olfactory hydrocarbon contamination Ground Level 11.85m AO Medium dense brown sandy cobbly GRAVEL. Gravel and cobbles are sub rounded to rounded fine to coarse sandstone, mudstone, siltstone. (FLUVIO-GLACIAL EPOIT) Hole Information From To Method iameter 0.00m 1.0m Legend 1.0m 5.00m Hand Tools Cable Percussive Rig Reduced Water Level epth Casing Level (mao) orehole Number - 150mm H Final Installation/ ackfill cale 150 heet 1 of 1 Logged y Checked y tart ate Finish ate ampling & In itu Testing epth Type Number NE CP 1/10/1 1/10/1 N= (,5,7,6,5,) W... below.0m bgl becoming very clayey with no cobbles N=17 (,10,5,5,,) /179mm (6,1,,15,) tiff to hard red brown slightly silty sandy very gravelly CLAY. Gravel fine to coarse rounded to sub-angular sandstone and mudstone. (GLACIAL TILL) /8mm (,10,1,15,1,9).50m 150mm.50 orehole complete at 5.00 m bgl /16mm (,11,17,7,6) Observations / Remarks. 1. Inspection Pit hand excavated to 1.m bgl prior to drilling.. Groundwater observed at 1.8m. Hole backfilled with bentonite Chiselling Groundwater Time From To Time truck Rising to (mins).00m.50m 60 mins 1.80m 1.70m 0 Remarks

30 WYG ENVIRONMENT Ground Engineering ervices 5th Floor, Longcross Court, 7 Newport Road, Cardiff, CF 0A. Tel , Fax Project t Asaph FRM Project Number A089 Client Natural Resources Wales Method Cable Percussive Rig Co-ordinates 059.7E N ark brown clayey sandy ILT with many roots and rootlets (TOPOIL) rown cobbly angular to sub-angular sandstone and mudstone GRAVEL. (MAE GROUN) Ground Level 1.09m AO Hole Information From To Method iameter 0.00m 1.0m Legend 1.0m 5.00m Hand Tools Cable Percussive Rig Reduced Water Level epth Casing Level (mao) orehole Number - 150mm H Final Installation/ ackfill cale 150 heet 1 of 1 Logged y Checked y tart ate Finish ate ampling & In itu Testing epth Type Number NE CP 15/10/1 16/10/1 Very loose black clayey slightly sandy angular fine ash, brick, glass and metal GRAVEL (MAE GROUN) N= (1,0,0,1,0,1) N=7 (1,1,1,1,,) oft light brown slightly gravelly ILT. Gravel of fine angular sandstone. (ALLUVIUM) U 7 lows=0 blows - No Recovery rown slightly clayey slightly silty sandy rounded to sub-rounded GRAVEL & COLE. (FLUVIO-GLACIAL EPOIT) W tiff red brown silty slightly sandy gravelly cobbly CLAY. Gravel and cobbles of rounded to sub-rounded sandstone. (GLACIAL TILL) W /177mm (6,1,6,6,8) /1mm (9,8,1,17,17,) orehole complete at 5.5 m bgl Observations / Remarks. 1. Inspection Pit hand excavated to 1.m bgl prior to drilling.. Groundwater observed at.5m bgl.. ackfilled with bentonite from 5.0m bgl to.00m bgl, 50mm slotted pipe with gravel surround from.00m bgl to.50m bgl, 50mm plain pipe with bentonite surround from.50m bgl to ground level.. Falling head test conducted within borehole. Chiselling Groundwater Time From To Time truck Rising to (mins) Remarks.50m 5.00m 60 mins.50m.0m 0 eeping

31 WYG ENVIRONMENT Ground Engineering ervices 5th Floor, Longcross Court, 7 Newport Road, Cardiff, CF 0A. Tel , Fax Project t Asaph FRM Project Number A089 Client Natural Resources Wales Method Cable Percussive Rig Co-ordinates 055.0E N ark brown slightly sandy ILT with many roots and rootlets. (TOPOIL) rown and black slightly silty slightly sandy very cobbly fine to coarse, angular GRAVEL of brick and coal with tile, glass and metal fragments. (MAE GROUN) Ground Level 1.m AO Hole Information From To Method iameter 0.00m 1.0m Legend 1.0m 6.00m Hand Tools Cable Percussive Rig Reduced Water Level epth Casing Level (mao) orehole Number - 150mm H5 Final Installation/ ackfill cale 150 heet 1 of 1 Logged y Checked y tart ate Finish ate ampling & In itu Testing epth Type Number NE CP 15/10/1 16/10/ Medium dense becoming dense brown slightly silty slightly sandy rounded to sub-rounded sandstone and mudstone GRAVEL with occasional cobbles. (FLUVIO GLACIAL EPOIT).... gravel and cobbles layer at.0m bgl to.5m bgl /88mm (,,6,1,,7) N=18 (11,6,5,,,5) N=7 (5,7,6,5,7,9).... cobble layer.8m to.0m /5mm (5,1,1,17,1,6) tiff red mottled grey brown silty gravelly CLAY with occasional sandstone cobbles. (GLACIAL TILL) /7mm (,9,10,10,11,19) orehole complete at 6.00 m bgl m 150mm /15mm (1,1,6,) Observations / Remarks. 1. Inspection Pit hand excavated to 1.m bgl prior to drilling.. Groundwater observed at.80m bgl, rising to.m bgl. At.m bgl at start of second day.. ackfilled with bentonite from 6.00m bgl to.00m bgl, 50mm slotted pipe with gravel surround from.00m bgl to.50m bgl, 50mm plain pipe with bentonite surround from.50m bgl to ground level.. Falling head test conducted within borehole. Chiselling Groundwater Time From To Time truck Rising to (mins) Remarks.50m.00m 60 mins.80m.0m 0 eeping.50m.00m 60 mins 5.50m 6.00m 60 m mins

32 WYG ENVIRONMENT Ground Engineering ervices 5th Floor, Longcross Court, 7 Newport Road, Cardiff, CF 0A. Tel , Fax Project t Asaph FRM Project Number A089 Client Natural Resources Wales Method Cable Percussive Rig Co-ordinates 050.1E N Red brown slightly sandy ILT with many roots and rootlets. (TOPOIL) rown orange clayey silty sandy angular brick, sandstone, ash GRAVEL & COLE (MAE GROUN) Firm to stiff red brown slightly sandy slightly gravelly CLAY. Gravel of fine to coarse angular to rounded brick, sandstone, coal and ash. (MAE GROUN) Ground Level 15.7m AO Hole Information From To Method iameter 0.00m 1.0m Legend 1.0m 6.00m Hand Tools Cable Percussive Rig Reduced Water Level epth Casing Level (mao) orehole Number - 150mm H7 Final Installation/ ackfill cale 150 heet 1 of 1 Logged y Checked y tart ate Finish ate ampling & In itu Testing epth Type Number U NE CP 1/10/1 15/10/1 91 lows=0 lows, 00mm recovered ense brown clayey silty sandy GRAVEL of fine to coarse sub-rounded to rounded sandstone and mudstone. (FLUVIO GLACIAL EPOIT) N=8 (,6,5,9,1,1) N=17 (,5,7,,,) N=50 (10,11,10,9,1,10) tiff red brown mottled grey silty sandy gravelly CLAY. Gravel of fine to coarse rounded to sub-rounded sandstone and mudstone. (GLACIAL TILL) N=8 (,5,5,6,7,10) 5.50 orehole complete at 6.00 m bgl m 150mm N=0 (,,,,6,6) Observations / Remarks. 1. Inspection Pit hand excavated to 1.m bgl prior to drilling.. Groundwater observed at.6m bgl, rising to.m bgl. At.6m bgl at start of second day.. ackfilled with bentonite from 6.00m bgl to.50m bgl, 50mm slotted pipe with gravel surround from.50m bgl to.00m bgl, 50mm plain pipe with bentonite surround from.00m bgl to ground level.. Falling head test undertaken in borehole. Chiselling Groundwater Time From To Time truck Rising to (mins).50m.00m 60 mins.60m.0m 0.00m.50m 60 mins Remarks

33 WYGENVIRONMENT part of thewyg group Ground Engineering ervices 5th Floor, Longcross Court, 7 Newport Road, Cardiff, CF 0A Tel admin.cardiff@wyg.com Window ample / Probe Number heet 1 of 1 cale 150 W01 Project t Asaph FRM Method Windowless ampler and uper Heavy ynamic Probe Client Natural Resources Wales Ground Level 1.17 Easting Northing epth Readings lows / 100mm epth ample E Water trike Remarks V s = 98kPa Reduced Level epth V s = 18kPa V s = 55kPa escription Grass over brown silty CLAY with rootlets. (TOPOIL). Very stiff brown slightly sandy CLAY. (UN - MAE GROUN).... at 1.5mbgl, becoming softer and drier/friable with depth. ark brown silty slightly gravelly fine to medium AN. Gravel is fine to coarse, sub-rounded to rounded of sandstone. (MAE GROUN). Firm reddish brown silty CLAY. (ALLUVIUM). oft dark grey CLAY. (ALLUVIUM). rown grey sandy fine to coarse, sub-rounded to rounded GRAVEL of sandstone. (FLUVIO-GLACIAL EPOIT) Inst. / ackfill Remarks 1. Hand excavated pit to 1.0m bgl prior to drilling.. No groundwater encountered.. ackfilled with arisings. ynamic ampling Run From To iameter Recovery 1.0m.00m 87mm 100%.00m.00m 77mm 100%.00m.00m 67mm 100%.00m 5.00m 57mm 100% Fall Height Hammer Wt Probe Type Cone ize 750mm 6.50kg PH 50mm PROJECT NO. Logged by Checked by Release tatus Excavation ate A089 GC CP Final 1/10/01

34 WYGENVIRONMENT part of thewyg group Ground Engineering ervices 5th Floor, Longcross Court, 7 Newport Road, Cardiff, CF 0A Tel admin.cardiff@wyg.com Window ample / Probe Number heet 1 of 1 cale 150 W0 Project t Asaph FRM Method Windowless ampler and uper Heavy ynamic Probe Client Natural Resources Wales Ground Level 1.00 Easting Northing epth Readings lows / 100mm epth ample E Water trike.85 Remarks V s = 5kPa V s = 78kPa V s = 78kPa V s = 5kPa V s = 68kPa Reduced Level epth.95 escription Grass over brown silty CLAY with rotlets. (TOPOIL) tiff to firm brown mottled grey and orange CLAY with occasional gravel. (UN - MAE GROUN)... bund present until approximately.00m bgl.... becoming dry and friable at.85mbgl rown sandy fine to coarse, sub-rounded to rounded GRAVEL of sandstone with pockets of coarse sand throughout. (FLUVIO-GLACIAL EPOIT) Inst. / ackfill Remarks 1. Inspection Pit hand excavated to 1.0mbgl prior to drilling.. Groundwater strike at.85 m bgl during sampling.. Upon completion exploratory hole backfilled with Arisings and bentonite ynamic ampling Run From To iameter Recovery 1.0m.00m 87mm 100%.00m.00m 77mm 100%.00m.00m 67mm 100%.00m 5.00m 57mm 100% 5.00m 6.00m 57mm 100% 6.00m 6.60m 57mm 100% Fall Height Hammer Wt Probe Type Cone ize 750mm 6.50kg PH 50mm PROJECT NO. Logged by Checked by Release tatus Excavation ate A089 GC CP Final 1/10/01

35 Plate Title Plate No WINOW AMPLE 01 1 Client Plate Title Plate No. WYG Environment 5 th Floor, Longcross Court, 7 Newport Road, Cardiff Tel Fax Environmental Consultancy Ground Engineering ervices Project Client Plate Title T AAPH FRM WINOW AMPLE 0 Checked by NRW CP Plate No.

36 WYGENVIRONMENT part of thewyg group Ground Engineering ervices 5th Floor, Longcross Court, 7 Newport Road, Cardiff, CF 0A Tel admin.cardiff@wyg.com Window ample / Probe Number heet 1 of 1 cale 150 W0 Project t Asaph FRM Method Windowless ampler and uper Heavy ynamic Probe Client Natural Resources Wales Ground Level 1.01 Easting Northing epth Readings lows / 100mm epth ample E Water trike Remarks V s = 50kPa V s = 57kPa V s = 80kPa V s = 55kPa Reduced Level epth escription Grass over brown silty CLAY with rootlets. (TOPOIL) Firm to stiff reddish brown slightly sandy slightly gravelly CLAY. Gravel is fine to coarse sub-rounded to rounded of sandstone. (UN - MAE GROUN) ark grey mottled brown clayey fine to medium AN. (ALLUVIUM) rown grey sandy fine to coarse, sub-rounded to rounded GRAVEL of sandstone. (FLUVIO-GLACIAL EPOIT) Inst. / ackfill Remarks 1. Inspection pit hand excavated to 1.0mbgl prior to drilling.. ackfilled with arisings.. No groundwater encountered. ynamic ampling Run From To iameter Recovery 1.0m.00m 87mm 100%.00m.00m 77mm 100%.00m.00m 67mm 100% Fall Height Hammer Wt Probe Type Cone ize 750mm 6.50kg PH 50mm PROJECT NO. Logged by Checked by Release tatus Excavation ate A089 GC CP Final 1/10/01

37 WYGENVIRONMENT part of thewyg group Ground Engineering ervices 5th Floor, Longcross Court, 7 Newport Road, Cardiff, CF 0A Tel admin.cardiff@wyg.com Window ample / Probe Number heet 1 of 1 cale 150 W0 Project t Asaph FRM Method Windowless ampler and uper Heavy ynamic Probe Client Natural Resources Wales Ground Level Easting Northing epth Remarks Readings lows / 100mm Inspection pit hand excavated to 1.0mbgl prior to drilling.. ackfilled with arisings.. Groundwater struck at.5mbgl epth ample E Water trike Remarks V s = 8kPa ynamic ampling Run Fall Height From To iameter Recovery 1.0m.00m.00m.00m 87mm 77mm 100% 100% Hammer Wt.00m.00m 67mm 100%.00m 5.00m 5.00m 6.00m 57mm 57mm 100% 100% Probe Type Cone ize Reduced Level epth mm 6.50kg PH 50mm escription Grass over brown silty CLAY with rootlets. (TOPOIL) rown gravelly fine to coarse AN. Gravel is fine to coarse, angular to rounded of brick, limestone and sandstone. (UN - MAE GROUN) rown mottled orange very clayey fine to medium AN. (MAE GROUN) Grey brown coarse AN. (MAE GROUN) rown black very sandy CLAY. (MAE GROUN)... becoming sandy/gravelly with depth rick cobble. (MAE GROUN) White/grey angular GRAVEL of quartz. (MAE GROUN) Very soft grey CLAY. (ALLUVIUM) rown sandy fine to coarse, sub-rounded to rounded GRAVEL of sandstone. (FLUVIO-GLACIAL EPOIT) PROJECT NO. Logged by Checked by Release tatus Excavation ate CP Inst. / ackfill A089 GC Final 1/10/01

38 Plate Title Plate No WINOW AMPLE 0 Client Plate Title Plate No. WYG Environment 5 th Floor, Longcross Court, 7 Newport Road, Cardiff Tel Fax Environmental Consultancy Ground Engineering ervices Project Client Plate Title T AAPH FRM WINOW AMPLE 0 Checked by NRW CP Plate No.

39 WYGENVIRONMENT part of thewyg group Ground Engineering ervices 5th Floor, Longcross Court, 7 Newport Road, Cardiff, CF 0A Tel admin.cardiff@wyg.com Window ample / Probe Number heet 1 of 1 cale 150 W05 Project t Asaph FRM Method Windowless ampler and uper Heavy ynamic Probe Client Natural Resources Wales Ground Level 1.08 Easting Northing epth Readings lows / 100mm epth ample E Water trike Remarks V s = 18kPa V s = 8kPa V s = 1kPa Reduced Level epth escription Grass over brown silty sandy CLAY with rootlets. (TOPOIL) rown slightly sandy gravelly CLAY. Gravel is fine to coarse, sub-rounded to rounded of sandstone. (UN - MAE GROUN) oft reddish brown slightly gravelly CLAY. Gravel is fine-medium, sub-rounded to rounded of sandstone. (UN - MAE GROUN) rown sandy gravelly CLAY. Gravel is fine to coarse, sub-angular to sub-rounded of sandstone. (UN - MAE GROUN) Firm reddish brown CLAY. (UN - MAE GROUN) Inst. / ackfill White sandstone cobble. (UN - MAE GROUN) rown and grey sandy very gravelly CLAY sub-angular to sub-rounded sandstone. (UN - MAE GROUN) rown and grey slightly silty sandy fine to coarse, sub-rounded to rounded GRAVEL of sandstone. (UN - MAE GROUN) oft brown CLAY. (ALLUVIUM) 5.0 rown sandy fine to coarse, sub-rounded to rounded GRAVEL of sandstone. (FLUVIO-GLACIAL EPOIT) Remarks 1. Inspection pit hand excavated to 1.0mbgl prior to drilling.. ackfilled with arisings.. No groundwater encountered. ynamic ampling Run From To iameter Recovery 1.0m.00m 87mm 100%.00m.00m 77mm 100%.00m.00m 67mm 100% Fall Height Hammer Wt Probe Type Cone ize 750mm 6.50kg PH 50mm PROJECT NO. Logged by Checked by Release tatus Excavation ate A089 GC CP Final 1/10/01

40 WYGENVIRONMENT part of thewyg group Ground Engineering ervices 5th Floor, Longcross Court, 7 Newport Road, Cardiff, CF 0A Tel admin.cardiff@wyg.com Window ample / Probe Number heet 1 of 1 cale 150 W06 Project t Asaph FRM Method Windowless ampler and uper Heavy ynamic Probe Client Natural Resources Wales Ground Level Easting Northing epth Readings lows / 100mm epth ample Water trike Remarks Reduced Level epth escription White and grey angular GRAVEL path covering. (MAE GROUN - PATH) rown mottled grey very gravelly CLAY of fine to coarse, angular to sub-rounded of sandstone with wood and brick fragments. (UN - MAE GROUN) Quartz and sandstone cobbles with some brown clay. (UN - MAE GROUN) Firm to stiff brown slightly sandy gravelly CLAY. (UN - MAE GROUN)... becoming gravelly with depth. rown gravelly AN, gravel is fine to coarse, sub- rounded to rounded. (FLUVIO-GLACIAL EPOIT) Inst. / ackfill Remarks 1. Inspection pit hand excavated to 1.0mbgl prior to drilling.. ackfilled with arisings.. No groundwater encountered. ynamic ampling Run From To iameter Recovery 1.0m.00m 87mm 100%.00m.00m 77mm 100% Fall Height Hammer Wt Probe Type Cone ize 750mm 6.50kg PH 50mm PROJECT NO. Logged by Checked by Release tatus Excavation ate A089 GC CP Final 1/10/01

41 Plate Title WINOW AMPLE 05 Plate No 5 Client Plate Title Plate No. WYG Environment 5 th Floor, Longcross Court, 7 Newport Road, Cardiff Tel Fax Environmental Consultancy Ground Engineering ervices Project Client Plate Title T AAPH FRM WINOW AMPLE 06 Checked by NRW 6 CP Plate No.

42 WYGENVIRONMENT part of thewyg group Ground Engineering ervices 5th Floor, Longcross Court, 7 Newport Road, Cardiff, CF 0A Tel admin.cardiff@wyg.com Window ample / Probe Number heet 1 of 1 cale 150 W07 Project t Asaph FRM Method Windowless ampler and uper Heavy ynamic Probe Client Natural Resources Wales Ground Level 1.57 Easting Northing epth Readings lows / 100mm epth ample E Water trike Remarks V s = 1kPa V s = 19kPa V s = 19kPa V s = 1kPa Reduced Level epth escription Grass over brown silty CLAY with rootlets. (TOPOIL) rown gravelly sandy ILT with occasional brick fragments. Gravel is fine to coarse, sub-angular to rounded of sandstone. (UN - MAE GROUN) oft brown CLAY. (UN - MAE GROUN).... becoming firmer and gravelly with depth. rown and black gravelly ILT. Gravel is fine to coarse, angular sandstone. (MAE GROUN) oft brown silty CLAY. (ALLUVIUM) rown sandy fine to coarse, sub-rounded to rounded GRAVEL of sandstone. (FLUVIO-GLACIAL EPOIT) Inst. / ackfill Remarks 1. Inspection pit hand excavated to 1.0mbgl prior to drilling.. ackfilled with arisings.. No groundwater encountered. ynamic ampling Run From To iameter Recovery 1.0m.00m 87mm 100%.00m.00m 77mm 100%.00m.00m 67mm 100% Fall Height Hammer Wt Probe Type Cone ize 750mm 6.50kg PH 50mm PROJECT NO. Logged by Checked by Release tatus Excavation ate A089 GC CP Final 1/10/01

43 WYGENVIRONMENT part of thewyg group Ground Engineering ervices 5th Floor, Longcross Court, 7 Newport Road, Cardiff, CF 0A Tel admin.cardiff@wyg.com Window ample / Probe Number heet 1 of 1 cale 150 W08 Project t Asaph FRM Method Windowless ampler and uper Heavy ynamic Probe Client Natural Resources Wales Ground Level 1.18 Easting Northing epth Readings lows / 100mm epth ample E Water trike Remarks Reduced Level epth V s = 110kPa escription Grass over silty CLAY. (TOPOIL) ark brown sandy gravelly CLAY with roots rootlets and fragments of brick. Gravel is fine to coarse, sub-rounded to rounded of sandstone. (UN - MAE GROUN) Reddish brown gravelly CLAY. Gravel is fine to coarse, sub-rounded to rounded of sandstone. (UN - MAE GROUN) rown sandy gravelly ILT. Gravel is fine to coarse, angular to rounded of sandstone, brick, limestone and ornamental slate with glass fragments. (UN - MAE GROUN)... bone at 1.00mbgl. Very stiff reddish brown slightly sandy CLAY with occasional gravels of fine to medium, angular sandstone. (UN - MAE GROUN). Inst. / ackfill.0 rown gravelly AN, gravel is fine to coarse, sub- rounded to rounded. (FLUVIO-GLACIAL EPOIT) Remarks 1. Inspection pit hand excavated to 1.0mbgl prior to drilling.. ackfilled with arisings.. No groundwater encountered. ynamic ampling Run From To iameter Recovery 1.0m.00m 87mm 100%.00m.00m 77mm 100% Fall Height Hammer Wt Probe Type Cone ize 750mm 6.50kg PH 50mm PROJECT NO. Logged by Checked by Release tatus Excavation ate A089 GC CP Final 1/10/01

44 Plate Title Plate No WINOW AMPLE 07 7 Client Plate Title Plate No. WYG Environment 5 th Floor, Longcross Court, 7 Newport Road, Cardiff Tel Fax Environmental Consultancy Ground Engineering ervices Project Client Plate Title T AAPH FRM WINOW AMPLE 08 Checked by NRW 8 CP Plate No.

45 WYGENVIRONMENT part of thewyg group Ground Engineering ervices 5th Floor, Longcross Court, 7 Newport Road, Cardiff, CF 0A Tel admin.cardiff@wyg.com Window ample / Probe Number heet 1 of 1 cale 150 W09 Project t Asaph FRM Method Windowless ampler and uper Heavy ynamic Probe Client Natural Resources Wales Ground Level 1.59 Easting Northing epth Readings lows / 100mm epth ample E Water trike Remarks V s = 110kPa Reduced Level epth escription Grass over silty CLAY. (TOPOIL) rown mottled white clayey gravelly ILT. Gravel is fine-coarse, sub-angular to rounded of sandstone. (UN - MAE GROUN) Light brown very dry gravelly slightly sandy ILT. Gravel is fine to coarse, angular to sub-rounded of sandstone. (UN - MAE GROUN) tiff reddish brown slightly sandy CLAY with occasional gravels of fine to medium, angular sandstone. (UN - MAE GROUN) rown gravelly AN, gravel is fine to coarse, sub- rounded to rounded. (FLUVIO-GLACIAL EPOIT) Inst. / ackfill Remarks 1. Inspection pit hand excavated to 1.0mbgl prior to drilling.. ackfilled with arisings.. No groundwater encountered. ynamic ampling Run From To iameter Recovery 1.0m.00m 87mm 100%.00m.00m 77mm 100% Fall Height Hammer Wt Probe Type Cone ize 750mm 6.50kg PH 50mm PROJECT NO. Logged by Checked by Release tatus Excavation ate A089 GC CP Final 1/10/01

46 WYGENVIRONMENT part of thewyg group Ground Engineering ervices 5th Floor, Longcross Court, 7 Newport Road, Cardiff, CF 0A Tel admin.cardiff@wyg.com Window ample / Probe Number heet 1 of 1 cale 150 W10 Project t Asaph FRM Method Windowless ampler and uper Heavy ynamic Probe Client Natural Resources Wales Ground Level Easting Northing epth Readings lows / 100mm epth ample E E Water trike Remarks V s = 105kPa V s = 8kPa Reduced Level epth escription Grass over dark brown gravelly silty CLAY with rootlets. (TOPOIL) rown and grey silty sandy fine to coarse, angular GRAVEL of decorative slate. (UN - MAE GROUN) rown sandy gravelly ILT gravel is fine to coarse, angular to sub - rounded sandstone. (UN - MAE GROUN) tiff brown mottled grey slightly gravelly CLAY. Gravel is fine, angular sandstone. (UN - MAE GROUN) lack mottled red, white and grey slightly clayey gravelly AN with glass and brick fragments and ash and clinker. Gravel is fine to coarse, angular sub - rounded brick, limestone and sandstone. (MAE GROUN) Very soft light brown CLAY. (ALLUVIUM). Inst. / ackfill Grey brown gravelly sandy fine to coarse, sub - rounded to rounded GRAVEL of sandstone. (FLUVIO-GLACIAL EPOIT) Remarks 1. Inspection pit hand excavated to 1.0mbgl prior to drilling.. ackfilled with arisings.. No groundwater encountered. ynamic ampling Run From To iameter Recovery 1.0m.00m 87mm 100%.00m.00m 77mm 100%.00m.70m 67mm 100% Fall Height Hammer Wt Probe Type Cone ize 750mm 6.50kg PH 50mm PROJECT NO. Logged by Checked by Release tatus Excavation ate A089 GC CP Final 15/10/01

47 Plate Title WINOW AMPLE 09 9 Client Plate Title Plate No. WYG Environment 5 th Floor, Longcross Court, 7 Newport Road, Cardiff Tel Fax Environmental Consultancy Ground Engineering ervices Project Client Plate Title T AAPH FRM WINOW AMPLE 10 Checked by NRW 10 CP Plate No.