atv-a-147-e-pt2

GERMAN ATV STANDARDS

W A S T E W A T E R - W A S T E

STANDARD ATV - A 147 E

Operating Expenditure for the Sewer System Part 2: Requirement for Personnel, Vehicles and Equipment

March 1995 ISBN 3-934984-28-2

Marketing: Gesellschaft zur Förderung der Abwassertechnik e.V. (GFA) Theodor-Heuß-Allee 17 D-53773 Hennef Postfach 11 65 . 53758 Hennef

ATV-A 147-2 E

March 1995 2

The ATV Working Group 1.7.5 "Operating Costs in the Sewer System" has prepared the following Standard.

The following contributed:

K. Bader, Zürich Dipl.-Ing. L. Barenthien, Düsseldorf Bauing. G. Edel, Karlsruhe J. Groß, Koblenz Dipl.-Ing. W. Kristeller, Frankfurt (Spokesman) Dipl.-Ing. J. Nolle, Marl Dipl.-Ing. G. Rubach, Herne Prof. Dipl.-Ing. H. P. Schilp, Stuttgart Dipl.-Ing. J. Tams, Kiel

The Standard presented here has been prepared within the framework of the ATV committee work, taking into account the ATV Standard A 400 "Principles for the Preparation of Rules and Standards" in the Rules and Standards Wastewater/Wastes, in the January. 1994 .version. With regard to the application of the Rules and Standards, Para. 1 of Point 5 of A 400 includes the following statement: "The Rules and Standards are freely available to everyone. An obligation to apply them can result for reasons of legal regulations, contracts or other legal grounds. Whosoever applies them is responsible for the correct application in specific cases. Through the application of the Rules and Standards no one avoids responsibility for his own actions. However, for the user, prima facie evidence shows that he has taken the necessary care.

All rights, in particular those of translation into other languages, are reserved. No part of this Standard may be reproduced in any form by photocopy, microfilm or any other process or transferred or translated into a language usable in machines, in particular data processing machines, without the written approval of the publisher.

Gesellschaft zur Förderung der Abwassertechnik e.V. (GFA), Hennef 1995

Produced by: Druck Carl Weyler KG, Bonn

ATV-A 147-2 E

March 1995 3

Contents Page

Preliminary remarks 4

1 Inspection 4

2 Cleaning 4

3 Damage repair (structural maintenance) 4

4 Special services 4

5 Works depot 4

6 Manpower assessment 5 6.1 Daily working time on site 5 6.2 Employment days per year 6 6.3 Manpower requirement for management functions, administrative tasks and central tasks 6 6.4 Manpower requirement 6

7 Vehicle and equipment scaling 7 7.1 Availability of vehicles and equipment 7 7.2 Requirement for vehicles and equipment 8

8 Standard Specifications and Standards 8

9 Appendix 9 9.1 Tables 1 - 10 9-14 9.2 Calculation example 15 et seq

ATV-A 147-2 E

March 1995 4

Preliminary Remarks The activities of sewer operation are summarised and described in ATV Standard A 147 "Operating Expenditure for the Sewer System, Part 1, Operating Tasks and Intervals". Normal intervals are given for the implementation of individual tasks.

In the here presented Part 2 "personnel, Vehicles and Equipment" the individual tasks given in Part 1 are respectively allotted the manpower, the vehicle and equipment requirement. In addition further initial details are given for the determination of the operating resources. The given daily performances are to be seen as average values from practice. With the figures given it is assumed that the tasks are completed by own staff. With the involvement of outside firms the figures given must be reduced according to the still remaining in-house component.

All resource values are given in tabular form in accordance with the task descriptions in line with Part 1. The descriptions of the activities and the frequencies from Part 1 are repeated here in brief. The control figures in Part 2 correspond with those of Part 1.

Attention is drawn to ATV Standard A 148 "Service and Operating Instructions for Personnel of Wastewater Pumping Stations, Wastewater Pressure Pipelines and Stormwater Tanks" for mechanical and electrotechnical plants, measurement, control and regulation technology.

1 Inspection Details are contained in Table 1.

2 Cleaning Details are contained in Table 2.

3 Damage Repair (Structural Maintenance) Details are contained in Table 3.

4 Special Services Details are contained in Table 4.

5 Works Depot Manpower resources and operating costs must be determined by individual case depending on the size, organisation and scope of the tasks of the sewer operation. It is recommended that the manpower requirement for Para. 6.3 is calculated (see also Examples 1-3 for Para. 6.3).

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6 Manpower Assessment The assessment of manpower requires the determination of - the actual daily working times on site, - the actual operational days per year.

The manpower requirement for management functions, administrative activities and central tasks are not contained in Sections 1 - 4. This manpower requirement is to be determined separately.

6.1 Daily Working Time on Site

With the details on daily performances in Sections 1 - 4, a daily working time of six hours on site is laid down as reference quantity. With deviations from this, the daily performances are to recalculated accordingly. The actual available daily working time can, in individual cases, be determined as follows:

Daily working time:

gross working time ....min/day

from this deduct average driving time depot - place of work - ....min/day

average vehicle loading time - ....min/day

washing time - ....min/day

others, e.g. teabreak, etc. - ....min/day

net working time ....min/day

Example:

38.5 hour week, 5 day week gross working time - 462 min/day

from this deduct average driving time depot - place of work - 30 min/day

average vehicle loading time - 30 min/day

washing time - 30 min/day

others, e.g. teabreak, etc. - 10 min/day

net working time 362 min/day ≈ 6 hours

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March 1995 6

6.2 Employment Days per Year

The actual available employment days per year can be determined as follows:

Operating days:

gross working days ....days/year

from this deduct holidays incl. special holidays - ....days/year

shortening of working hours in accordance with BAT* or BMT** - ....days/year

average loss through sickness - ....days/year

others, e.g. losses through works meetings, works medical service works anniversaries, etc. - ....days/year

net operating days ....days/year

Example:

gross working days - 252 days/year

from this deduct holidays incl. special holidays - .35 days/year

shortening of working hours in accordance with BAT* or BMT** - 2 days/year

average loss through sickness - 36 days/year

others, e.g. losses through works meetings, works medical service works anniversaries, etc. - 6 days/year

net operating days 173 days/year

6.3 Manpower Requirement for Management Services, Administrative Activities and Central Tasks

The requirement for personnel and the necessary qualification of the staff depend essentially on the size, organisation and the scope of tasks of the sewer operation. The manpower requirement can be calculated using Table 5. Examples for various sizes of operation and tasks are given in Tables 6 - 8.

6.4 Manpower Requirement for Workmen

The requirement for workmen for inspection, cleaning, damage repair and other services can be determined using Table 9.

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March 1995 7

7 Vehicle and Equipment Scaling The vehicles and equipment suitable and required for the individual activities are given in the tables in Sections 1 - 4. Further information on this are contained in, for example:

- ATV Standard A 140, Rules for the Operation of Sewers, Part 1: The Sewer Network

- Maintenance of Sewer Systems, Standards for the Maintenance of Pipelines and Facilities of the Sewer System. Association of Swiss Wastewater Specialists, 1992 Edition.

7.1 Availability of Vehicles and Equipment

The actual availability for the scaling of vehicles and equipment can be determined according to the following scheme. As a result each type of vehicle and equipment is to be covered individually:

gross employment days ....days/year

from this deduct days for: repair ....days/year

maintenance and vehicle servicing ....days/year

weather dependent breakdowns ....days/year

personnel casualties which cannot be covered by operational staff ....days/year

others, e.g. works meetings, courses, etc. ....days/year

net employment days ....days/year

Example 1, large equipment (e.g. combined high pressure flushing and suction vehicle, suction vehicle, high pressure flushing vehicle)

gross employment days 252 days/year

from this deduct days for: repair - 25 days/year

maintenance and vehicle servicing - 15 days/year

weather dependent breakdowns - 5 days/year

personnel casualties which cannot be covered by operational staff - 10 days/year

others, e.g. works meetings, courses, etc. - 5 days/year

net employment days 192 days/year

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Example 2, crew vehicle

gross employment days 252 days/year

from this deduct days for: repair - 6 days/year

maintenance and vehicle servicing - 6 days/year

weather dependent breakdowns - 2 days/year

personnel casualties which cannot be covered by operational staff - 8 days/year

others, e.g. works meetings, courses, etc. - 5 days/year

net employment days 225 days/year

7.2 Requirement for Vehicles and Equipment

The requirement for vehicles and equipment can be determined using Table 10.

8 Standard Specifications and Standards

8.1 ATV Rules and Standards Wastewater - Waste

ATV Standard A 140, Rules for the Operation of Sewers, Part 1: The Sewer Network

ATV Standard A 147, Operating Expenditure for the Sewer System, Part 1: Operating Tasks and Intervals

ATV Standard A 148, Service and Operating Instructions for Personnel of Wastewater Pumping Stations, Wastewater Pressure Pipelines and Stormwater Tanks 8.2 Others

Maintenance of Sewer Systems, Standards for the Maintenance of Pipelines and Facilities of the Sewer System. Association of Swiss Wastewater Specialists, 1992 Edition

ATV-A 147-2 E

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9 Appendix

9.1 Tables 1 - 10

Table 1: Inspection No. Activity Frequency per

year Crew strength

(workmen) Vehicles and/or

equipment Daily

performance (with 6 hrs

working time on site)

Resources as guidance value

Remarks

1 Inspection 1.1 Inspection of man accessible

sewers Normal case:

0.1-0.2 Special case:

0.5

5 - 7* 2 x crew vehicles 350 - 650 m Frequency depending on age, material, structural condition * of these at least 1 foremen, 1 mechanic or 1 engineer

1.2 Inspection of non-man accessible sewers

Normal case: 0.1 Special case:

0.5

2 - 3 1 x sewer TV vehicle

400 - 800 m On 1.1 and 1.2 without planning and operational preparation and assessment

1.3 Leakproof testing on in-service sewers

- - - - - See ATV Standard A 147, Part 1, Sect. 1.3

1.4 Shaft inspection with access 0.2 0.1

3 2

1 x crew vehicle1 x crew vehicle

25 - 30 items 30 - 35 items

In thoroughfares In residential roads and other areas

1.5 Shaft inspection without access

1.0 0.5

3 2


60 - 70 items 70 - 80 items

In thoroughfares In residential roads and other areas

1.6 Inspection of shafts and road gullies on acceptance after

road works

As required 2 1 x crew vehicleor

1 x suction vehicle

60 - 80 items

1.7 Inspection and servicing of shut-off devices, barrier

plates, slide valves without motor drive

2 or according to

servicing instructions

2 - 4 1 x crew vehicle 8 - 12 items

1.8 Inspection and servicing of wash-out gates and backflow

flaps

2 or according to

servicing instructions

2 - 4 1 x crew vehicle 10 - 20 items

1.9 Acceptance and/or take-over inspections, warranty

acceptance - using mirrors

- by access

As required As required

3 - 4

1 x crew vehicle

20 - 25 sewer sections

see No. 1.1

1.10 Acceptance and/or take-over inspections, warranty

acceptance using TV

As required 2 - 3 1 x TV vehicle 300 - 700 m Performance depends essentially on number and length of the sewers to be inspected

1.11 Inspection of lateral sewers As required 2 1 x crew vehicle with portable TV

system

5 - 6 laterals

1.12 Inspection and servicing of throttle devices on stormwater

overflows

Operational 26 Structural 1

2- 3 3


10 - 20 items 8 - 12 items

1.13 Inspection of outfalls Operational 4 Structural 1

2 2


10 - 12 items 8 - 15 items

1.14 Inspection of stormwater tanks (ST)

Operational 12

Structural 1

Open ST 2 Closed ST 2 -

4 Open ST 2

Closed ST 2 - 4

1 x crew vehicle1 x crew vehicle1 x crew vehicle1 x crew vehicle

4 - 6 items 4 - 6 items 3 - 4 items 1 - 2 items

1.15 Inspection of special structures, e.g. siphons,

vortex shafts

Operational 12 Structural 0.1 -

0.2

2 2 - 4


Object dependent

Object dependent

1.16 Inspection of structures for pumping stations and external

systems

1 2 1 x crew vehicle or 1 x lt vehicle

Object dependent

1.17 Inspection of open wastewater trenches

12 2 1 x crew vehicle 8000 - 12000 m

1.18 Inspection and servicing of pressure and vacuum

drainage systems - pump shafts

- fixtures - pressure pipelines

1 2

As required

2 2 2

1 combined high pressure flushing

and suction vehicle

1 x crew vehicle1 x combined high pressure flushing and

suction vehicle

12 items

20 - 30 items

600 - 800 m

1.19 Others 15 - 30 % of the

man-days/year of Nos 1.1 -

1.18

The scope of work is dependent i.a. on the drainage system and the local conditions

ATV-A 147-2 E

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Table 2: Cleaning No. Activity Frequency per

year Crew strength

(workmen) Vehicles and/or

equipment Daily

performance (with 6 hrs


Resources as guidance value

Remarks

2 Cleaning 2.1 Sewer and shaft cleaning 2 - 01* * Frequency with

system cleaning per month 0.33

2.1.1 Sewer and shaft cleaning with combined high pressure

flushing and suction vehicle - with water recycling (WR)

-without water recycling

2 2

1 combined HP flushing and

suction vehicle with WR

1 combined HP flushing and

suction vehicle without WR

900 - 1100 m**

800 - 1000 m**

Dimensioning basis DN 200 -300 mm Dimensioning basis DN 200 -300 mm

2.1.2 Sewer and shaft cleaning with high pressure flushing vehicle

and suction vehicle

3 - 4 With entrance

4

1 x HP flushing vehicle

1 x suction vehicle

1000 - 1200 m** - Dimensioning basis DN 200 -300 mm

2.1.3 Sewer and shaft cleaning with high pressure flushing vehicle

2 1 x HP flushing vehicle

1100 - 1400 m** Without solids removalDimensioning basis DN 200 -300 mm

2.1.4 Sewer cleaning with cable winch

4 1 x crew vehicle1 x winch

150 - 300 m

2.1.5 Sewer cleaning with flushing shield

4 - 5 1 x crew vehicle1 x flushing

shield, if required suction vehicle

Object dependent

2.1.6 Sewer cleaning with surge flushing

3 1 x crew vehicle 10 - 15 flushing cycles

2.1.7 Sewer cleaning by hand using other techniques

4 - 8 At least 1 x crew vehicle

Object dependent

2.2 Siphon cleaning 2.2.1 Siphon cleaning to ensure

function up to 52 2

With entry: 3 1 x HP flushing

vehicle or 1 x combined HP

and suction vehicle

Object dependent

2..2.2 Basic siphon cleaning Object dependent

Object dependent

Object dependent

Object dependent

2.3 Cleaning of grit chambers Object dependent

Object dependent

Object dependent

Object dependent

2.4 Cleaning of sludge compartment of street gullies

1 - 0.67* 2 1 x suction vehicle

50 - 70 items * more often with chip spreading

2.5 Cleaning of street gully buckets

2* 2 1 x sludge skip vehicle with

crane

60 - 80 items * more often with chip spreading

2.6 Cleaning of drainage channels 2 If required more

often

2 -3 1 x crew vehicle 50 - 200 m

2.7 Cleaning of stormwater overflows

1 If required more

often

3 1 x crew vehicle or


5 - 10 items

2.8 Cleaning of outfalls 1 If required more

often

2 1 x crew vehicle or


8 - 12 items

2.9 Cleaning of stormwater tanks (ST)

1 If required more

often

Open ST 3 - 4

Closed ST 4 - 6

Object dependent

Object dependent

2.10 Cleaning of pump sumps

- shaft pumping stations (without access)

- pump sumps (with access)

1 If required more

often

2 - 3

3 - 4

1 x suction vehicle or 1 x combined HP and suction

vehicle

4 - 5 items

1 - 3 items

2.11 Cleaning of separator plants - light liquid separator

(DIN 1999) -- grease separator

(DIN 4040)

2

If required more often 12

If required more often

2 2

1 x special

suction vehicle

1 x suction vehicle

3 - 6 items

3 - 6 items

2.12 Emptying of interceptor ditches

If required 2 1 x suction vehicle

3 - 6 items

2.13 Desludging of small sewage treatment plants

If required 2 ! x suction vehicle 3 - 6 items

2.14 Cleaning of open wastewater ditches

2 If required more

often

2 - 3 1 x crew vehicleif required

additional suction vehicle

100 - 500 m

2.15 Others 15 - 20 % of man-days/year of Nos. 2.1 -

2.14

The scope of work is dependent i.a. on the drainage system and the local conditions

** Explanation: Factor for conversion to other diameters

DN (mm) 350 - 500 600 - 800 900 - 1200 > 1200 Performance

x 0.7 0.5 0.3 Object

dependent Oval and other special profiles can be allotted to the appropriate class by profile width

ATV-A 147-2 E

March 1995 12

Table 3: Damage repair

No. Activity Frequency per year

Crew strength (workmen)

Vehicles and/or equipment

Daily performance (with 6 hrs


Resources as guidance value Remarks

3 Damage repair (structural maintenance)

3.1 Repair of road gullies 1 - 1.5 % of inventory

2 1 x crew vehicle with lifting

equipment and compressor

2 - 3 items

3.2 Replacement of road gullies 1 - 1.5 % of inventory

2 - 3 1 x crew vehicle with lifting


1 item

3.3 Repair of manhole covers 1 - 2 % of inventory

2 1 x crew vehicle with lifting


2 - 4 items

3.4 Replacement of manhole covers

1 - 1.5 % of inventory

2 - 3

1 x crew vehicle with lifting


2 items

3.5 Repair and renewal of climbing aids

1 - 1.3 % of the inventory

2 1 x crew vehicle and compressor

8 - 12 items

3.6 Repair and conversion of shaft walls and bottoms

As required 2 - 3 1 x crew vehicleand compressor

Object dependent

30 - 40 man-days/year

and 100 km sewer length

3.7 Repair and repointing of bricked sewers

2 - 3 % of the sewer length in

brickwork

3 - 4 1 x crew vehicle with lifting


Object dependent

* with sludge technology: 10 - 20 m2 per crew and day, dependent on type of technology

3.8 Repair of sewers made from other materials

As required Object dependent

Object dependent

Object dependent

3.9 Bricking up or removal of walling

As required 3 - 5 1 x crew vehiclewith lifting


Object dependent


and 100 km

3.10 Removal of obstacles As required Object dependent

Object dependent

Object dependent


and 100 km

3.11 Repair of faulty and worn connections which are no

longer required

As required 3 - 5 1 x crew vehicle with lifting equipment

Object dependent

3.12 Repair of sub-surface parts of special structures (e.g. pump stations, stormwater tanks, outfalls, overflow devices,

siphons)


Object dependent

Object dependent

3.13 Repair of operational buildings and outside installations


Object dependent

Object dependent

5 man-days/year and

object

3.14 Testing and sealing of sleeves and pipe connections

As required 2 1 x special vehicle

20 - 30 items Daily effort with DN ≤ 600 mm Effort dependent on number of leaking sleeves

3.15 Repair and renewal of lateral sewers

2 - 3 % of connections

Object dependent

Object dependent

Object dependent

3.16 Assistance to outside firms As required Object dependent

Object dependent

Object dependent

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March 1995 13

Table 4: Special services

4 Special services

4.1 Combating of rats in sewer shafts

10- 30 % of shafts

2 1 x crew vehicle 50 - 70 shafts

4.2 Maintenance of wastewater ditch embankments areas

2 As required more

frequently

3 1 x crew vehicle with grass cutting

equipment

250 - 500 m2

4.3 Maintenance of grassed areas As required 1 - 2 1 x crew vehicle with grass cutting

equipment

500 - 1500 m2

4.4 Others incl. balancing of working hours when on-call

and overtime

10 - 20 % of man-days/year of Nos. 1 - 3

Guidance value: 200 - 250 man-

days/year and 100 km

Table 5: Sample table of personnel requirement for management functions, administrative activities and central tasks

Task Engineer Foreman Construction technician

Superintendent/ specialist as foreman's assistant

Administrative staff

Workmen

Operational/district management Administration Inspection Cleaning Damage repair (structural maintenance) Depot Others

Σ ΣΣ

Table 6: Example 1 Assumption: network length 200 km, combined sewer system, no responsibility for domestic connections, damage repair (structural maintenance and employment of construction firms), 12 workmen


Superintendent/

specialist as foreman's assistant


Workmen


1

1

1

1

2

Σ 1 1 1 1 2 ΣΣ 6

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March 1995 14

Table 7: Example 2 Assumption: network length 600 km, combined and separate sewer system, responsibility for domestic connections, separators and small sewage treatment plants, damage repair (structural maintenance and employment of construction firms), 90 workmen (of which 35 for domestic connections, separators and small sewage treatment plants)


Superintendent/



Workmen


1

1

1

1 1 1

2

1

1 1 2

1 2

2

1

3

Σ 3 5 1 7 3 3 ΣΣ 22

Table 8: Example 3

Assumption: network length 1000 km, combined and separate sewer system, responsibility for domestic connections, damage repair (structural maintenance and employment of construction firms), 130 workmen (of which 40 for domestic connections)


Superintendent/



Workmen


1

1

1

2 2

1

1 2

1

1

2 2

2

1 4

2

1

6

Σ 3 8 2 11 3 6 ΣΣ 33

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Table 9: Sample table of personnel requirement for workers for inspection/cleaning/damage repair/special tasks

No. Activity Sewer network length or number

Requirement/

frequency per year

Sewer network length or number per year (3)x(4)

Crew strength

Daily effort

Crew days per

year (5)÷(7)

Man-days per

year

Net working days per year and worker

Required

number of

workers (9)÷(10)

Remarks

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12)

Explanations: 1) Details for columns (2), (4), (6), (7) from Tables 1 to 4 2) Net working days column (10): see example for Sect. 6.2. 3) With common net Working days the necessary number of workers can be formed from the Σ of column 9 divided by the net Working days 4) It is recommended that a separate table calculation is carried out for every field of activity

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Table 10: Sample table for vehicle/equipment requirements

No. Activity Vehicle and/or

equipment

No. of vehs/eqpts per crew

Crew days per year

Veh/eqpt days per

year (4)x(5)

Net Working

days veh/eqpt per year

Required number of vehs/eqpt

(6)÷(7)

Remarks

(1) (2) (3) (4) (5) (6) (7) (8) (9)

Explanations: 1) Details for column (5) transferred from Table 9, column (8) 2) Net Working days column (7): see example to Sect. 7.1 3) It is recommended that a separate determination is carried out for each area of activity 4) The final requirement for vehicles and equipment of a certain type is to be consolidated in a separate, type designated list (without sample table)

ATV-A 147-2 E

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9.2 Calculation Example

Example of the determination of the necessary personnel and vehicle requirement

Basic data sewer network

Sewer network taken as a basis (matrix and other details):

No. System - type/equipment Unit Status 1/93

Remarks

1 2 3 4 5 6 7 8 9 10 11 12

Sewers - total length of this as combined system of this as separate system wastewater sewers of this as separate system stormwater sewers Nominal width < 350 Nominal width 350 - 500 Nominal width 550 - 800 Nominal width 800 - 1150 Nominal width ≥ 1200 Entry/control shafts of these in main roads of these in side roads Street outlets* of these dry of these wet Drainage channels* *) Note: winter service on roads with wet salt winter service on roads with Open ditches Maintenance of embankment areas by construction department Special structures Stormwater overflows SO Stormwater tank with overflow STO Total number of stormwater outlets Stormwater holding tanks/sewers Pumping stations/pump wells Grit and sludge traps Siphons (length of the siphons 1 x 200 and 3 x 160m) Operational installations Flushing devices Gate valves High water double clack valves Domestic connections a) b) for monitoring for cleaning for structural maintenance Light density material separator (previously cleaned at least once a year by municipal services) Grease separator Cesspits Emptying to be organised by house owner Small sewage treatment plants - monitoring - desludging Desludging organised by municipal authorities

km km km km km km km km km item item item item item item m km item item item item item item item item item item item item km item item item item item item

267.8 249 8.4 10.4 92 88.8 75 8.5 3.5 8400 1680 6720 12000 11940 60 150 40 36 24 50 10 16 46 4 6 30 11 12000 ca. 80 80 80 80 n/a n/a 200 100 40 100

Internal Distribution Combi HD30 6229.8 5925 50 2.5 6 0 3.5 incl. public waters in part from river aver. 6-7 m planned planned planned outside firm outside firm outside firm with public receiving waters outside firm

ATV-A 147-2 E

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Damage repair (structural maintenance) is carried out by the construction department or an outside firm tasked by it.

Basic data daily working time, employment days, vehicles and equipment

Daily working time i.a.w Sect. 6.1

Gross working time 462 min/d

from this deduct average travelling time depot - working place - 30 min/d

average vehicle loading time - 30 min/d

washing time - 30 min/d

others, e.g. tea-break, etc. - 10 min/d

Net working time 362 min/d ≈ 6 hrs

Employment days per year i.a.w. Sect 6.2

Gross working days 248 d/a

from these deduct holidays incl. special holidays - 35 d/a

reduction in working time i.a.w. BAT/BMT [German Public Service pay tariffs] - 2 d/a

average time loss through illness - 15 d/a

others, e.g. time losses due to works meetings, medical treatment, official celebrations - 6 d/a

Net working days 190 d/a

Availability of vehicles and equipment i.a.w. Sect. 7.1

1. Combined high pressure flushing from and suction vehicle, suction vehicle, high pressure flushing vehicle 248 d/a

from these deduct days for: repairs - 25 d/a

maintenance and vehicle servicing - 15 d/a

losses due to weather - 5 d/a

lack of personnel which cannot be offset by operational staff - 8 d/a

others, e.g. works meetings, training, etc. - 5 d/a

Net employment days 190 d/a

ATV-A 147-2 E

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2. Sludge skip vehicle

Gross working days 248 d/a







3. Crew vehicle

Gross employment days 248 d/a







4. Sewer television vehicle

Gross employment days 248 d/a







ATV-A 147-2 E

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Personnel requirement for workers for inspection (i.a.w. Table 9)


Requirement/ frequency per

year

Sewer network length

or number per year (3)x(4)

Crew strength

Daily effort

Crew days per year

(5)÷(7)

Man-days per

year

Net work days per year and

worker

Required

number of

workers (9)÷(10)

Remarks

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12)

1 2 3 4

5

6 7 8 9

10

11

12 13 14

15 16 17

1.1 1.2 1.3

1.41 1.42 1.51 1.52 1.6 1.7 1.8

1,92 1.10

1.11

1.12 1.13 1.14

1.15 1.16 1.17

3,500 m 264,300m

20 items 1,680 items 6,720 items 1,344 items 6,048 items 8,400 items

41 items 6 items

∼ 70 sect. 264,000m

∼20,000

item

36 items 50 items 34 items

4 items

16 items 40,000 m

0.2 0.1 1

0.2 0.1 1.0 0.5

0.04 2 2

0.04 0.03

0.04

26 4

12

12 1

12

700

26,430

20

336

672

1,344

3,024

336 82

12

28 7,929

800

936 200 408

48

16480,000

5 3 3 3 2 3 2 2 3 3 3 2

2

2 2 3

3 2

12

350

400

5

30

35 65 75 60

8

10

20 300

8

15 10 5

8 810,000

2.0 66.1

4 11.2 19.2 20.7 40.3 5.6 10.3 1.2 0.1 26.4

100

62.420

81.6

62

48

10.0 198.2 12.0 33.6 38.4 62.0 80.6 11.2 30.8 3.6 0.4 52.9

200

124.8 40

244.8

18 4 96

selected demo projects maint. period 25 yrs maint. Period 25 yrs renewal and growth rate 3.0 % p.a. domestic connections and street runoff sewers to date only demo projects operational operational, ST mainly closed operational

18 - deleted - 19 1.19 others 277.5 22% of sum 1.1-1.18

1,538.8 190 8.1 determn.(10) i.a.w. 6.2

Explanations: 1) Details for columns (2), (4), (6), (7) from Tables 1 to 4 2) Net working days column (10): see example for Sect. 6.2. 3) With common net working days the necessary number of workers can be formed from the Σ of column (9) divided by the net working days 4) It is recommended that a separate table calculation is carried out for every field of activity

ATV-A 147-2 E

March 1995 21

Manpower requirement for workers for inspection (i.a.w. Table 9)



year


Crew strength

Daily effort

Crew days per

year (5)÷(7)

Man-days per year

Net work days per year and

worker

Required number

of workers (9)÷(10)

Remarks

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12)

1

2.1.1

2.1.1 2.1.1 2.1.1

30,000

29,800

0.33

0.33 0.33 0.33

9,900

9,834 8,250 825

2

2 2 2

900

630 450 270

11.0

15.6 18.3 3.1

22.0

31.2

36.7 6.1

comb. veh. w/o water recirc, DN < 350 DN < 550 DN < 850 DN ≤ 1200

Σ2.1.1 48.0

2 2.1.3 2.1.3 2.1.3 2.1.3 2.1.3

62,000 59,000 50,000

6,000 3,500

0.33 0.33 0.33 0.33 0.33

20,460 19,400 16,500 1,980 1.155

2 2 2 2 2

1,250 875 625 375 250

16.4 22.3 26.4 5.3 4.6

32.7 45.5 52.8 10.6 9.2

HD veh, DN < 350 DN < 550 DN < 850

DN ≤ 1200 DN > 1200

Σ2.1.3 75.0

3 4

5 6 7 8 9

10 11 12 13 14

15 16 17 18

2.1.6 2.1.7

2.2.1 2.2.2 2.3 2.4 2.5

2.6 2.7 2.8 2.9

2.10.1

2.10.2 2.12 2.13 2.14 2.15

6 items 28,710m

4 items 4 items

46 items 60 items

11,940 item

150 m 36 items 50 item

34 items 10 items

6 items

(200 items (100

items (40,000

m others

0.5 0.5

12 0.1 4 2

2.3

26 1 1 1 1

2 4

0.2 0.2

3 14,355

48

0.4 184 120 27,462

3,900 36 50 34 10

12 800 20 8,000

3 4

2x3 6 3 2 2

3 3 2 5 3

4 2 2 3

12 300

2 1 4 60 70

150 6 10

0.5 5

2 4 5500

0.3 47,9

24 0.4

46 2

392.3

26 8 5 68 2

6200 4

16

0.8

191.4

144

2.4 138 4

784.6

78 18 10 340 6

24 400)

0) 48)

397

with HP cleaning of large sewers i.a.w. 2.1.1 and 2.1.3 solids removal necessary after very 2nd section in part by constr. dept more often before underpasses, bridges and in pedestrian zones small pumping stns, also with underpasses by outside firm by outside firm by outside firm

≈ 20% 0f sum 2.1-2.1.4

sum of cleaning effort 2,385 190 12.6

Note: activities 2.1.2, 2.1.4, 2.1.5 are not carried out

Explanations: 1) Details for columns (2), (4), (6), (7) from Tables 1 to 4 2) Net working days column (10): see example for Sect. 6.2. 3) With common net Working days the necessary number of workers can be formed from the Σ of column 9 divided by the net Working days 4) It is recommended that a separate table calculation is carried out for every field of activity

ATV-A 147-2 E

March 1995 22

Manpower requirement for workers for special services (i.a.w. Table 9) No. Activity Sewer

network length or number


year


Crew strength

Daily effort

Crew days per year

(5)÷(7)

Man-days per year

Net working

days per year and

worker

Required number

of workers (9)÷(10)

Remarks

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12)

3. Damage repair (structural maintenance) is carried out completely by construction dept. Therefore no determination here

1 4.1 1,680 items

1 1,680 2 60 28 56 20 % of shafts

2 3

4.2 4.3

- deleted - - with sewer network special structures -

by constr. dept. By constr. dept.

Sub total

Total inspection effort Total cleaning effort Total damage repair

56

1,539 2,385

-

4 4.4 590 15% of man-days 1 - 3

Grand total of personnel requirement for workers 4,570 190 24.1 Determination of working days i.a.w. 6.2 (see Appx)

Explanations: 1) Details for columns (2), (4), (6), (7) from Tables 1 to 4 2) Net working days column (10): see example for Sect. 6.2. 3) With common net working days the necessary number of workers can be formed from the Σ of column 9 divided by the net Working days 4) It is recommended that a separate table calculation is carried out for every field of activity

Table of manpower requirement for management functions, administrative activities and central tasks (i.a.w. Table 5) Task Engineer Foreman Construction

technician Superintende

nt/ specialist as

foreman's assistant


Workmen


1

1

1

1

1

2

Σ 1 1 1 1 1 2 ΣΣ 7

ATV-A 147-2 E

March 1995 23

Vehicle/equipment requirements for inspection (i.a.w. Table 10)


equipment


Crew days per year

Veh/eqpt days per

year (4)x(5)

Net Working



(6)÷(7)

Remarks

(1) (2) (3) (4) (5) (6) (7) (8) (9)

1 2

3

4

5

6 7 8 9

10

11

12 13 14 15 16

17 19

1.1 1.2

1.3

1.4.1 1.4.2 1.5.1 1.5.2 1.6 1.7 1.8 1.9

1.10

1.11

1.12 1.13 1.14 1.15 1.16

1.17 1.19

Crew veh. Sewer TV

veh. Crew veh.

Crew veh. Crew veh. Crew veh. Crew veh. Crew veh. Crew veh. Crew veh. Crew veh. Sewer TV

veh. Crew veh.

Portable TV eqpt.

Crew veh. Crew veh. Crew veh. Crew veh. Crew veh.(Or lt veh.) Crew veh. Crew veh.

2 1

1

1 1 1 1 1 1 1 1 1

1 1

1 1 1 1 1

1 for others

2 66.1

4

1.2 19.2 20.7 40.3 5.6

10.3 1.2 0.1

26.4

100 100

62.4 20

81.6 6 2

48

4.0 66.1

4

11.2 19.2 20.7 40.3 5.6

10.3 1.2 0.1

26.4

100 100

62.4 20

81.6 6 2

48 93.4

until now selected demo procedures only until now used sporadically with demo procedures, future requirement ≥ 2.5 times 21.4 % of total 1.1 - 1.18

Crew veh Total 530 222 2.4 Determn. Workdays i.a.w. 7.1

TV veh Total 92.5 171 0.54 Determn. Workdays i.a.w. 7.1

Portable TV eqpt

Total

100

220

0.45

Determn. Workdays i.a.w. 7.1

Explanations: 1) Details for column (5) transferred from Table 9, column (8) 2) Net Working days column (7): see example to Sect. 7.1 3) It is recommended that a separate determination is carried out for each area of activity 4) The final requirement for vehicles and equipment of a certain type is to be consolidated in a separate, type designated list (without sample table)

ATV-A 147-2 E

March 1995 24

Vehicle/equipment requirements for cleaning (i.a.w. Table 10)


equipment


Crew days per year

Veh/eqpt days per

year (4)x(5)

Net working days

veh/eqpt per year


(6)÷(7)

Remarks

(1) (2) (3) (4) (5) (6) (7) (8) (9) 1

2 3 4

5

6

7

8 9

10

11

12 13

14

15 16 17

2.1.1

2.1.3 2.1.6 2.1.7

1 2.2.1

2.2.2

2.3

2.4 2.5

2.6

2.7

2.8 2.9

2.10.1 2.10.2 2.12 2.13 2.14

Combi.

HP veh. Crew veh. Crew veh.

Sludge skip

veh. Sludge skip Crew veh. HP veh.

Crew veh. HP veh. Suction

veh. Crew veh.

Combi Sludge skip

veh. Suction

veh. Sludge skip

veh. Crew veh.

Combi Crew veh.

Combi Crew veh. Crew veh.

Combi Sludge skip

veh. Sludge skip

Combi Combi Suction

veh. Suction

veh. Suction veh

.

1

1 1

1 0.21

1 1 1 1 1 1

0.5 0..5

1 1 1

0..5 0..5 0..5 0..5

1 0..5 0..5

0.4 1.0 1 1 1 1

0.2

48

75 0..3 47.9

47.9

47.9 24 24 0.4 0.4 0.4 46 46 46

2

392.3

26 26 6 6 5

68 2 6 - -

16

48

75 0..3 47.9

9.6

47.9 24 24 0.4 0.4 0.4 46 23 23

2

392.3

13 13 3 3 5

34 34

27.2

68 2 6 - -

3.2

Combi - combined HP and suction vehicle w/o WR solids removal with HP cleaning in large sewers delivery of empty skips, removal of full skips outside firm employment as supplement; provision for construction dept.

18 ***

2.15 - various - taken into account in equipping f individual vehs and eqpt.

Crew veh. for others

173.6 34.4

≈ 20 % of total 2.1 - 2.1.4

Total cleaning 208 222 0.94 determn working days i.a.w. 7.1 Combi

for others 129 26

≈ 20 % of total 2.1 - 2.1.4

Total cleaning 155 190 0.82 determn working days i.a.w. 7.1 HP veh.

For others 99.4 20

≈ 20 % of total 2.1 - 2.1.4

Total cleaning 119.4 190 0.63 determn working days i.a.w. 7.1 Sludge skip

veh.

For others

452.1 90.4

≈ 20 % of total 2.1 - 2.1.4

Total cleaning 542.5 205 2.65 determn working days i.a.w. 7.1 Suction

veh. Total cleaning 5.6 ← replace by combi

Sludge skip Total cleaning 115.9 in addition to employment of veh.

hold at least 1 further skip Explanations: 1) Details for column (5) transferred from Table 9, column (8) - 2) Net Working days column (7): see example to Sect. 7.1 - 3) It is recommended that a separate determination is carried out for each area of activity - 4) The final requirement for vehicles and equipment of a certain type is to be consolidated in a separate, type designated list (without sample table)

ATV-A 147-2 E

March 1995 25

Vehicle/equipment requirements for inspection (i.a.w. Table 10)


equipment


Crew days per year

Veh/eqpt days per

year (4)x(5)

Net Working



(6)÷(7)

Remarks

(1) (2) (3) (4) (5) (6) (7) (8) (9)

1 4.1 Crew veh. 1 28 28

Total requirement Crew veh. For inspection For cleaning

For special services

530 208 28

Total 766 222 3.45 determn working days i.a.w. 7.1 (comp. Appx)

Total requirement TV veh. 92.5 171 0.45 consider use of outside firms

Total requirement Combi 155 190 0.82 take over tasks of suction veh.

Total requirement HP veh 119.4 190 0.63 additional employment with TV veh?

Total requirement Sludge skip veh.

542.5 205 2.65

Total requirement Suction veh.

5.6 190 0.03 get rid of it!

Explanations: 1) Details for column (5) transferred from Table 9, column (8) 2) Net working days column (7): see example to Sect. 7.1 3) It is recommended that a separate determination is carried out for each area of activity 4) The final requirement for vehicles and equipment of a certain type is to be consolidated in a separate, type designated list (without sample table)

atv-a-147-e-pt2

Documents

swiss wastewater

bmt average

superintende

net working

special holidays

daily working

gross working

wastewater