cornwall drains · 20/02/2014 no rain or snow 1 x no rain or snow no nowhere nowhere street...

CORNWALL DRAINS

1 PENDENNIS ROAD PENZANCE

CORNWALL TR18 2BA

TEL: 01736 449424 MOB: 07889003429

Address: Date: 29th July 2014 Mrs. Sample Nowhere Nowhere Street

Tel: Mob:

Dear Mrs. Sample As requested we have attended the above property following the unblocking of the foul water drainage system & have facilitated a CCTV survey of the main foul water drainage system within the area of the blockage also within the property boundary & outline our findings below. Foul Water Drainage System. MH4 Interceptor d/stream to Property Boundary. The drain is constructed from 100mm diameter clay & the depth of Interceptor manhole MH4 is 1.03mtrs. The CCTV survey was conducted from Interceptor manhole MH4 downstream to the property boundary which is located at approximately 8.90mtrs downstream from the manhole. Root ingress is evident throughout the drain & also within Interceptor manhole MH4, the drain is also cracked at 1.50mtrs & fractured at 3.40mtrs downstream from manhole MH4, beyond the property boundary the drain becomes the responsibility of the local water authority South West Water.

Recommendations. We advise the Interceptor Trap is excavated & removed to provide access to remove the root ingress & High Pressure Water Jet clean the drain prior to the installation of a 100mm diameter silicate resin liner from manhole MH4 downstream to the property boundary for a distance of approximately 8.90mtrs to prevent further root ingress.

MH3 d/stream to MH4. The drain is constructed from 100mm diameter clay & the depth of manhole MH3 is 0.66mtrs. The CCTV survey was conducted from manhole MH3 downstream to Interceptor manhole MH4. Severe root ingress is evident throughout the section of 100mm diameter clay drain & also within manhole MH3. Recommendations. We advise the root ingress is removed from the drain & manhole, the drain is High Pressure Water Jet cleaned prior to the installation of a 100mm diameter polyester resin liner from manhole MH3 downstream to manhole MH4 for a distance of approximately 23.60mtrs to prevent further root ingress. Repair Methods. We have advised the above type of lining repairs as we consider them to be the most cost effective which alleviates the requirement for extensive excavation & replacement, this type of trench less repair will also avoid damage to mature gardens & surface areas.

Cause of Damage. The damage to the above sections of 100mm diameter clay foul water drain have been caused by root ingress growing through the joints of the drain from the trees which are located within the vicinity of the drainage system.

Quotation. MH4 Interceptor d/stream to Property Boundary. Excavate, remove interceptor Trap & replace with straight section of 110mm diameter plastic pipe, surround new pipe with pea gravel £ Remove root ingress & High Pressure Water Jet clean drain prior to installation of lining repair £ Install a 100mm diameter polyester resin liner from manhole MH4 d/stream to property boundary for a distance of approximately 8.90mtrs £ Repair sides of manhole where roots have ingressed £

MH3 d/stream MH4. Remove root ingress & High Pressure Water Jet clean drain prior to installation of lining repair £ Repair sides of manhole where roots have ingressed £ Install a 100mm diameter polyester resin liner from manhole MH3 d/stream to MH4 for a distance of approximately 23.60mtrs £

Make good excavations & removal of excess spoil £ Sub Total £ Vat £ Total £ Please Note: Due to the nature of working underground it is not possible to state conclusively that there will be no further damage discovered once the repairs are commenced, if this occurs, we will make all efforts to mitigate the costs and seek the authority through the appropriate channels before carrying out additional repairs. The costs to facilitate the above work is inclusive of all labour, materials & for the disposal of excess spoil from site on completion of the remedial repairs. If you wish to proceed with the above works we will require confirmation via email or in writing & payment will be required on completion. Should you require any additional information please do not hesitate to contact me at the above address. Yours Sincerely

Gary Tonkin T/A CORNWALL DRAINS

Cornwall Drains

SampleSurvey

30 July 2014

WinCan Europe Ltd, 10 Woking Business park, Albertdrive, Woking, GU21 5JYTelephone 01483762222 Facsimile 01483 762226

www.wincaneurope.com

GRADE 3,4 & 5 Summary¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯STRUCTURAL DEFECTS

Structural defectsSectionPLR Grade Fault descriptionAcceptable Structural ConditionGrade 3; Best practice suggests consideration be given to repair in the medium termGrade 4; Best practice suggests consideration be given to a repair to avoid potential collapseGrade 5; Best practice suggests this pipe is at risk of collapse at any time; urgent consideration should be givento a repair to avoid collapse

SERVICE / OPERATIONAL DEFECTS

Service defectsSectionPLR Grade Fault descriptionAcceptable Service ConditionGrade 3; Best practice suggests consideration be given to maintenance activities in the medium termGrade 4; Best practice suggests consideration be given to maintenance activity to avoid potential blockageGrade 5; Best practice suggests this pipe is at immediate risk of backing up / causing flooding

Abandoned Surveys

Camera no accessSectionPLR Fault descriptionAll Surveys Completed

Information

These summaries are based on the SRM grading from the WRC

Cornwall Drains 1 Pendennis Road

PenzanceTel: 01736 449424

Fax: Email: [email protected]

Project-informationProject name : Project Number : Contact : Date :SampleSurvey 20/02/2014

SampleSurvey // Page: 1

Client:Contact Name:Department:Road:Town:County:Telephone:Fax:Mobile:E-mail:

Mrs SampleMrs SampleOwnerNowhere StreetNowhereCornwall

Site:Contact Name:Department:Road:Town:County:Telephone:Fax:Mobile:E-mail:

Mrs SampleMrs SampleOwnerNowhere StreetNowhereCornwall

ContractorContact Name:Department:Road:Town:County:Telephone:Fax:Mobile:E-mail:

Cornwall DrainsGary Tonkin

1 Pendennis RoadPenzanceCornwall TR18 2BA01736 449424

[email protected]




Project-informationProject name : Project Number : Contact : Date :SampleSurvey 20/02/2014


Cornwall Drains 1 Pendennis RoadStreet : PenzanceTel: 01736 449424


City : Nowhere

Legend of Drawing:

WATER FLOW 1 Tree_Winter

Tree_Summer CESS PIT

SOAKAWAY: FOUL WATER GNDFLWC

SURFACE WATER SYPHON INTERCEPTOR

PETROL INTERCEPTOR PIPE RUN

RAINWATER PIPE ROAD GULLY

RODDING EYE SEPTIC TANK

SOIL & VENT PIPE COMBINED

SOAKAWAY: SURFACE WATER GULLY

W.C. PUMP CH

FOUL WATER




Fax: [email protected]

Place :

Defect Grade DescriptionProject Name : Project number : Contact : Date :SampleSurvey 20/02/2014


1: Brick: No Structural DefectsPipe: No Structural Defects

Acceptable Structural Condition

2: Brick: Minor cracking, Surface mortar loss, Spalling slight, wear slightPipe: Circumfrential crack, Moderate joint defects, Spalling slight, Wear slight

Minor collapse risk in short term but potential for further deterioration

3: Brick: Total mortorloss without other defects, single brick displaced, Deformation up to 5%,Spalling medium, Wear mediumPipe: Fractures with deformation up tp 5%, Longitudinal cracking or mulitlpe cracking, Minorloss of level, More severe joint

! Collapse unlikely in near future but future deterioration likely !

4: Brick: Total mortorloss with deformation greater than 10%, Deformation up to 10% andfractured, Displaced/hanging brickwork, Small number of missing bricksPipe: Broken, Deformation up to 10% and broken,, Fractured with deformation 5 - 10%,Multipl

!! Collapse likely in foreseeable future !!

5: Brick: Already Collapsed, Missing invert, Deformation over 10% and fractured,Displaced/hanging brickwork and deformation over 10%, Extensive missing bricksPipe: Already collapsed, Deformation over 10% and broken, Extensive areas of fabric missin

!!! Collapsed or collapse imminent !!!



Inspection reportDate : Job number : Weather : Operator : Section number : PLR SUFFIX:

Weather Vehicle : Camera : Preset : Cleaned : Operator :

Place : Location details: U/S MH :Road : Catchment: U/S Depth :Location Tape number : D/S MH :Inspection Pipe Length D/S Depth :

Use: Pipe shape :Year laid : Pipe size :Purpose : Pipe material :Total length : Lining :

Comment :

20/02/2014 no rain or snow 1 X

no rain or snow no

NowhereNowhere StreetProperty with buildingsMH4 (D/S) Boundary

MH41.03Boundary

Combined

Investigation of operational problem8.90 m

Circular100 mmVitrified clay

Roots, Fractured, Cracked

1:54 Position Observation


0.00 Start node type, manhole, reference number : MH1 Remarks: d/streamthrough Interceptor Trap to property boundary

0.00 Water level, 0% of the vertical dimension

0.00 General remark Remarks: Root ingress through sides of manhole

0.20 Junction, at 6 o'clock, diameter 100mm Remarks: Interceptor Trap

0.30 Roots, fine at joint Remarks: at outlet of Interceptor trap

0.80 Roots, mass at joint, 40% cross-sectional area loss Remarks: restrictingflow

1.50 Roots, fine at joint

1.50 Crack, circumferential at joint, from 10 to 3 o'clock


2.70 Line deviates left Remarks: 11degs approx

2.70 Line deviates down Remarks: 5degs approx

3.40 Roots, mass at joint, 15% cross-sectional area loss

3.40 Fracture, circumferential at joint, from 1 to 8 o'clock



MH4

Depth: 1.03

0 m

0.2 m

0.3 m

0.8 m

1.5 m




Inspection ReportDate : Job number : Weather : Operator : Section number : PLR :

Weather Vehicle : Camera : Preset : Cleaned : Grade:20/02/2014 no rain or snow 1 X

no rain or snow no




5.20 Line deviates right Remarks: 5degs approx



7.00 Line deviates left Remarks: 15degs approx

8.90 Finish node type, other special chamber reference number: BoundaryRemarks: Property Boundary

Boundary

STR no def STR peak STR mean STR total STR grade SER no def SER peak SER mean SER total SER grade0 0 0 0 1 0 0 0 0 1




Place :

Inspection picturesPlace : Road : Date : Section number : PLR Suffix :

Nowhere Nowhere Street 20/02/2014 1 X


Photo: 1_1_1_A.jpg0m, Start node type, manhole, reference number : MH1 Remarks: d/stream through Interceptor Trap to propertyboundary

Photo: 1_1_6_A.jpg0.2m, Junction, at 6 o'clock, diameter 100mm Remarks: Interceptor Trap

Photo: 1_1_7_A.jpg0.3m, Roots, fine at joint Remarks: at outlet of Interceptor trap

Photo: 1_1_8_A.jpg0.8m, Roots, mass at joint, 40% cross-sectional area loss Remarks: restricting flow




Place :




Photo: 1_1_9_A.jpg1.5m, Roots, fine at joint

Photo: 1_1_10_A.jpg1.5m, Crack, circumferential at joint, from 10 to 3 o'clock


Photo: 1_1_12_A.jpg2.7m, Line deviates left Remarks: 11degs approx




Place :




Photo: 1_1_14_A.jpg3.4m, Roots, mass at joint, 15% cross-sectional area loss

Photo: 1_1_16_A.jpg4m, Roots, fine at joint






Place :






Photo: 1_1_24_A.jpg7m, Line deviates left Remarks: 15degs approx

Photo: 1_1_25_A.jpg8.9m, Finish node type, other special chamber reference number: Boundary Remarks: Property Boundary



Inspection reportDate : Job number : Weather : Operator : Section number : PLR SUFFIX:

Weather Vehicle : Camera : Preset : Cleaned : Operator :

Place : Location details: U/S MH :Road : Catchment: U/S Depth :Location Tape number : D/S MH :Inspection Pipe Length D/S Depth :

Use: Pipe shape :Year laid : Pipe size :Purpose : Pipe material :Total length : Lining :

Comment :

20/02/2014 no rain or snow 2 X

no rain or snow no

NowhereNowhere StreetProperty with buildingsMH3 (D/S) MH4

MH30.96MH41.03

Combined

Investigation of operational problem23.60 m

Circular100 mmVitrified clay

Roots



0.00 Start node type, manhole, reference number : MH3 Remarks: d/stream

0.00 Water level, 0% of the vertical dimension

0.00 General remark Remarks: Root ingress through sides of manhole

0.00 Roots, fine at joint Remarks: at exit from manhole








5.00 Roots, fine

5.60 Roots, fine

6.20 Roots, fine


MH3

Depth: 0.96

0 m

0 m

0.6 m

1.8 m

2.5 m




Inspection ReportDate : Job number : Weather : Operator : Section number : PLR :

Weather Vehicle : Camera : Preset : Cleaned : Grade:20/02/2014 no rain or snow 2 X

no rain or snow no




8.10 Roots, fine













23.60 Finish node type, manhole reference number: MH4 Remarks:Interceptor

Depth: 1.03

MH4

STR no def STR peak STR mean STR total STR grade SER no def SER peak SER mean SER total SER grade0 0 0 0 1 4 1 0.17 4 2




Place :




Photo: 3_3_26_A.jpg0m, Start node type, manhole, reference number : MH3 Remarks: d/stream

Photo: 3_3_30_A.jpg0m, Roots, fine at joint Remarks: at exit from manhole






Place :







Photo: 3_3_38_A.jpg5m, Roots, fine




Place :




Photo: 3_3_40_A.jpg6.2m, Roots, fine







Place :











Place :





Photo: 3_3_57_A.jpg23.6m, Finish node type, manhole reference number: MH4 Remarks: Interceptor

cornwall drains · 20/02/2014 no rain or snow 1 x no rain or snow no nowhere nowhere street...

Documents