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Transcript of 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).
ATV-A 147-2 E
March 1995 5
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
ATV-A 147-2 E
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.
ATV-A 147-2 E
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
ATV-A 147-2 E
March 1995 8
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
March 1995 9
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
1 x crew vehicle1 x crew vehicle
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
1 x crew vehicle1 x crew vehicle
10 - 20 items 8 - 12 items
1.13 Inspection of outfalls Operational 4 Structural 1
2 2
1 x crew vehicle1 x crew vehicle
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
1 x crew vehicle1 x crew vehicle
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
March 1995 10
ATV-A 147-2 E
March 1995 11
Table 2: Cleaning 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
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
1 x HP flushing vehicle
5 - 10 items
2.8 Cleaning of outfalls 1 If required more
often
2 1 x crew vehicle or
1 x HP flushing vehicle
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
working time on site)
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
equipment and compressor
1 item
3.3 Repair of manhole covers 1 - 2 % of inventory
2 1 x crew vehicle with lifting
equipment and compressor
2 - 4 items
3.4 Replacement of manhole covers
1 - 1.5 % of inventory
2 - 3
1 x crew vehicle with lifting
equipment and compressor
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
equipment and compressor
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
equipment and compressor
Object dependent
15 - 20 man-days/year
and 100 km
3.10 Removal of obstacles As required Object dependent
Object dependent
Object dependent
15 - 20 man-days/year
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)
As required Object dependent
Object dependent
Object dependent
3.13 Repair of operational buildings and outside installations
As required Object dependent
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
ATV-A 147-2 E
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
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
1
1
1
1
2
Σ 1 1 1 1 2 ΣΣ 6
ATV-A 147-2 E
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)
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
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)
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
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
ATV-A 147-2 E
March 1995 15
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
ATV-A 147-2 E
March 1995 16
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
March 1995 17
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
March 1995 18
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
March 1995 19
2. Sludge skip vehicle
Gross working days 248 d/a
from these deduct days for: repairs - 15 d/a
maintenance and vehicle servicing - 10 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 205 d/a
3. Crew vehicle
Gross employment days 248 d/a
from these deduct days for: repairs - 8 d/a
maintenance and vehicle servicing - 6 d/a
losses due to weather - 2 d/a
lack of personnel which cannot be offset by operational staff - 5 d/a
others, e.g. works meetings, training, etc. - 5 d/a
Net employment days 222 d/a
4. Sewer television vehicle
Gross employment days 248 d/a
from these deduct days for: repairs - 30 d/a
maintenance and vehicle servicing - 15 d/a
losses due to weather - 12 d/a
lack of personnel which cannot be offset by operational staff - 12 d/a
others, e.g. works meetings, training, etc. - 8 d/a
Net employment days 171 d/a
ATV-A 147-2 E
March 1995 20
Personnel requirement for workers for inspection (i.a.w. Table 9)
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 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)
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 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
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)
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
Administrative staff
Workmen
Operational/district management Administration Inspection Cleaning Damage repair (structural maintenance) Depot Others
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)
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)
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)
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) 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)
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)
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)