atv-dvwk_m_197_e

GERMAN ATV-DVWK RULES AND STANDARDS Advisory Leaflet ATV-DVWK-M 197E Invitation to Tender for Sewer Cleaning Services Using the High pressure Flushing Process June 2004 ISBN 3-937758-56-9

Publisher/marketing: ATV-DVWK German Association for Water, Wastewater and Waste, Theodor-Heuss-Allee 17 y D-53773 Hennef Tel. ++49-22 42 / 8 72-120 y Fax:++49 22 42 / 8 72-100 E-Mail: [email protected] y Internet: www.atv-dvwk.de

ATV-DVWK-M 197E

The German Association for Water, Wastewater and Waste, ATV-DVWK, is the spokesman in Germany for all universal questions on water and is involved intensively in the development of secure and sustainable water management. As politically and economically independent organisation it operates specifically in the areas of water management, wastewater, waste and soil protection. In Europe the ATV-DVWK is the association in this field with the greatest number of members and, due to its specialist competence, it holds a special position with regard to standardisation, professional training and information of the public. The ca. 15,000 members represent the experts and executive personnel from municipalities, universities, engineer offices, authorities and businesses. The emphasis of its activities is on the elaboration and updating of a common set of technical rules and standards and with collaboration with the creation of technical standard specifications at the national and international levels. To this belong not only the technical-scientific subjects but also economical and legal demands of environmental protection and protection of bodies of waters.

Imprint Publisher/marketing:

Setting and printing [German original]:

ATV-DVWK German Association for Water, Wastewater and Waste. Theodor-Heuss-Allee 17 D-53773 Hennef Tel.: +49 (0) 22 42 / 8 72-120 Fax: +49 (0) 22 42 / 8 72-100 E-Mail: [email protected] Internet: www.atv-dvwk.de

DCM, Meckenheim

ISBN: 3-937758-56-9 Printed on 100 % recycling paper

© ATV-DVWK Deutsche Vereinigung für Wasserwirtschaft, Abwasser und Abfall e. V., Hennef 2004 All rights in particular the 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 into a language usable in a machine, in particular data processing machines, without the written approval of the publisher. The scientific correctness of the texts, diagrams and tables does not fall under the responsibility of the publisher.

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ATV-DVWK-M 197E

Foreword In the Federal Republic of German there exists a ca. 400,000 km long public sewer network. The sewers have to be cleaned within the scope of maintenance. Of the overall cleaning service the by far the largest part is carried out using the high pressure flushing process. Since ca. 1960 high pressure cleaning has been seen as an effective method for sewer cleaning. Nevertheless, up to today there are barely any standardised quality criteria, specialist terms and definitions which support the clear understanding between customer and contractor, for example with the invitation to tender for sewer cleaning services.

Authors This Advisory Leaflet ATV-DVWK-M 197 was elaborated by the ATV-DVWK Working Group ES-7.3 “Operation and Maintenance of Sewer Networks” within the ATV-DVWK Specialist Committee ES-7 “Operation and Maintenance”. The following have collaborated in this Working Group: Dipl.-Ing. Jens Feddern, Berlin Dipl.-Ing. Manfred Fuchs, Berlin Dipl.-Ing. Günther Helmich, Mülheim Dipl.-Ing. Robert Hertler, Stuttgart Dipl.-Ing. Karl-Hinrich Hoffmann, Pirmasens (Chairman) Dipl.-Ing. Roland Kammerer, Frankfurt a. M. Dipl.-Ing. Peter Prchal, Köln Dipl.-Kfm. Hans Müller, Schieder-Schwalenberg Dipl.-Ing. Josef Nolle, Marl Dipl.-Ing. Heino Jahn, München Dipl.-Ing. Werner Timmerbrink, Köln

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ATV-DVWK-M 197E

Contents Foreword..................................................................................................................................................

3

Authors ..................................................................................................................................................

3

User Notes ...............................................................................................................................................

6

1

Area of application .................................................................................................................

6

2

Definitions ...............................................................................................................................

6

3

Specifications for the Statement of Work............................................................................

8

3.1 3.2 3.2.1 3.2.2 3.2.3 3.2.4 3.2.5 3.2.6 3.2.7 3.2.8 3.2.9 3.2.10 3.2.11 3.2.12 3.2.13 3.2.14 3.2.15

Contract structuring and type of statement of work ................................................................. Minimum contents of a statement of work................................................................................ Details on the type of cleaning and the sewers to be cleaned................................................. Location of the manhole structure and possibility of approach by vehicle............................... Time factors for the execution of the sewer cleaning............................................................... Water for flushing ..................................................................................................................... Disposal of the cleared materials ............................................................................................. Requirements on cleaning vehicles ......................................................................................... Requirements on personnel ..................................................................................................... Determination of services......................................................................................................... Securing the working sites ....................................................................................................... Observation of the accident prevention regulations................................................................. Liability...................................................................................................................................... Cleaning of stormwater sewers................................................................................................ Additional services ................................................................................................................... Special services ....................................................................................................................... Verification of suitability............................................................................................................

8 9 9 10 10 10 10 10 11 11 11 12 12 12 12 12 12

4

Model of an invitation to tender for sewer cleaning services using the high pressure flushing process.....................................................................................................................

13

Breakdown of the statement of work....................................................................................................

14

I II III

Preamble to the specification and schedule of prices.............................................................. Specification and schedule of prices........................................................................................ Annexes to the specification and schedule of prices ...............................................................

14 14 14

I

Preamble to the specification and schedule of prices .......................................................

15

1 2 3 4 5 6 7 8 9 10

Scope of services and implementation times........................................................................... Execution of sewer cleaning .................................................................................................... Requirements on vehicles and equipment ............................................................................... Requirements on personnel ..................................................................................................... Safety of traffic and of working sites ........................................................................................ Flushing water and disposal of cleared material...................................................................... Observation of the accident prevention regulations................................................................. Determination and acceptance of the services ........................................................................ Waiting times and obstructions ................................................................................................ Settlement of accounts.............................................................................................................

15 15 16 16 17 17 17 18 19 19

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ATV-DVWK-M 197E 11 12

Liability ...................................................................................................................................... Verification of suitability.............................................................................................................

19 19

II

Specification and schedule of prices....................................................................................

21

1 2 3

Cleaning of sanitary and combined sewers .............................................................................. Cleaning of stormwater sewers................................................................................................. Other services ...........................................................................................................................

21 24 27

III

Annexes to the specification and schedule of prices .........................................................

29

Annex 1: Annex 2: Annex 3: Annex 4: Annex 5: Annex 6:

Previously damaged sewer sections......................................................................................... Roads/streets in which “No Stopping” signs are to be erected................................................. Transportation certificate........................................................................................................... Protocol measurement of the deposit heights .......................................................................... Daily report................................................................................................................................ Acceptance certificate ...............................................................................................................

29 30 31 32 33 35

Bibliography.............................................................................................................................................

36

Reference sources ....................................................................................................................................

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ATV-DVWK-M 197E

User Notes This Advisory Leaflet is the result of honorary, technical-scientific/economic collaboration which has been achieved in accordance with the principles applicable therefor (statutes, rules of procedure of the ATVDVWK and the Standard ATV-DVWK-A 400). For this, according to precedents, there exists an actual presumption that it is textually and technically correct and also generally recognised. The application of this Advisory Leaflet is open to everyone. However, an obligation for application can arise from legal or administrative regulations, a contract or other legal reason. This Advisory Leaflet is an important, however, not the sole source of information for correct solutions. With its application no one avoids responsibility for his own action or for the correct application in specific cases; this applies in particular for the correct handling of the margins described in the Advisory Leaflet.

1

Area of Application

A correctly operated sewer system is precondition for the necessary protection of surface waters. A sewer system can only meet its tasks if it is monitored and cleaned carefully. Aim of cleaning is to reduce the removal of pollutants into surface waters, to maintain the required discharge crosssection and thus the hydraulic efficiency of the sewer system as well as to control the formation of odour and gas. This Advisory Leaflet applies for the invitation to tender for sewer cleaning services using high pressure flushing processes in drains and sewers which are operated under gravity. The subject of this Advisory leaflet is the statement of work with specifications and schedule of prices. Aim of this Advisory Leaflet is to provide those agencies requesting tenders (municipalities, firms, associations and engineer offices) with assistance for the correct invitation to tender for sewer cleaning services. Hard deposits such as, for example, hardened concrete, root growth or encrustations are not pollutants which can be removed using the high pressure flushing process. In these cases the employment of special equipment is necessary. These methods are not dealt with in this Advisory Leaflet.

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Definitions

Types of cleaning The following types of cleaning are differentiated depending on the aims and expenditure: • Maintenance cleaning: Cleaning at regular time intervals according to a flushing plan or as required. The aim of maintenance cleaning is the removal of deposits from the bottom of the sewer. • Special cleaning: Cleaning in advance for a sewer inspection or for a rehabilitation measure. Aim is the removal of deposits from the bottom of the sewer and of the sewer film. • Basic cleaning: First cleaning or intensive cleaning to remove considerable deposits after a long pause in maintenance. In these cases one has to reckon with considerable difficulties due to the quantity and the hardening of deposits • Specialised cleaning: Cleaning of special profiles or of inverted siphons. In these cases, due to the channel flow, the quantity of deposits, the profile dimensions and shape as well as the length of the sewer section, considerable difficulties occur.

ATV-DVWK-M 197E Types of pollution The types of pollution are differentiated according to: • Organic pollution: grease, sewer film, faeces. • Mineral deposits: sand, gravel, pebbles, stones e. g. from brickwork sewers or manholes. In practice the deposits in sewers represent a mixture of mineral and organic substances, whose composition can vary considerably depending on local conditions and discharges. The organic share of the dry solid matter (ignition loss) in general is in the order of 5 % to 20 %. Deposits, which lead to particular difficulties with cleaning (e.g. stones, grease), are to be listed in the statement of work.

Height of deposits The height of deposits is understood to be the height of the deposits in cms measured from the deepest point of the profile to their surface for any cross-section. It is an important indication of the contamination of the sewer and the therefrom resultant cleaning expense. For an invitation to tender the following classes can be formed for example with sewers in the range of nominal widths from DN 300 to DN 600:

With larger profile dimensions a finer subdivision of classes is selected as the amount of the deposits to be removed, depending on deposit height, in the first place increases superproportionally. The client here must on one hand weigh up between a class breakdown which allows an as simple as possible description of the performance positions and thus a simple calculation and, on the other hand, combines sewers with comparable work load. The specific deposit volume depending on profile dimensions and the height of deposit is shown for assistance in Diag. 1. In non-man-accessible profiles the height of deposit relevant for the calculation can be measured with sufficient accuracy in the first and last pipe of a sewer section using a metre rule. A measurement in the manhole channel leads to inaccuracies as there the heights of deposit are affected by turbulence with larger flows which can deviate from those in the sewer sections. In simplification, it is assumed that the mathematical mean of the deposit heights at the start and end of a sewer section can be considered as representative for the height of deposits in the complete sewer section. With accessible profiles a more accurate determination of the deposit height should take place. Measurements can, for example, take place at 20 m intervals. So far as it is established with the inspection that the deposit heights do not change significantly within the sewer section, the intervals can be increased. The deposit height determined from the arithmetical mean of the measurements is relevant for the calculation.

• up to 10 cm height of deposit, • from 10 cm to 20 cm height of deposit, • from 20 cm to 30 cm height of deposit.

Manhole depth The manhole depth indicates the difference between the upper edge of the manhole and the deepest point in the shaft.

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ATV-DVWK-M 197E

Diag. 1:

3

Specific deposit volumes [m3] per 100 m sewer length depending on the profile dimensions and the height of deposit

Specifications for the Statement of work

3.1 Contract Structuring and Type of Statement of work Sewer cleaning represents a measure for the maintenance of wastewater facilities and is therefore to be designated as construction work within the meaning of § 1 VOB/A1. The VOB/A opens up various possibilities for contract structuring and the statement of work. Sewer cleaning tasks are to be awarded on the basis of service contracts (§ 5 Nr. 1 VOB/A). Service contracts are, as a rule, to be structured as standard price contracts. With these contracts technically and economically standard partservices , whose quantities are to be given by the client, are to be listed in the invitation to tender documentation. 1

VOB/A: Verdingungsordnung für Bauleistungen = Conditions concerning construction contracts

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In suitable cases the conclusion of a blanket contract is also possible. Prerequisite for the conclusion of a blanket contract is the precise knowledge of the scope and the executive conditions of a task as well as the secure assumption that one does not have to reckon with modifications during implementation. A blanket contract therefore only comes into consideration if cleaning tasks, limited by location and time, are to be carried out with precisely defined constraints. With cleaning tasks which are put out to tender over a longer period for large sewer networks this contract form is not permitted. It is precisely in these cases, for example, that the heights of deposits change during the execution period and thus considerably influence the scope of performance. The statement of work with sewer cleaning tasks is implemented, as a rule, using a specification and schedule of prices. (§ 9 No. 6 VOB/A). It covers a general technical representation of the task (preamble to the specification and schedule of prices) and the performance positions itemised into part performances. The client has to determine the physical dimensions (assumed conditions) to be carried out for the individual positions and enter

ATV-DVWK-M 197E these in the statement of work. As a rule, the length of the cleaned sewer stretch is used as reference dimension. With this, the performance positions must be differentiated particularly with regard to the profile size and, if required, profile shape as well as the deposit height, in order to enable a correct calculation. The advantages are that a flexible calculation of the services is possible even with changing constraints and allowances are made as far as possible for ideas on performance. However, the contract partners can demand the agreement of a new standard price with mass deviations of more than 10% compared with those in the statement of work (§ 2 No. 3 VOB/B). With the statement of work with the specification and schedule of prices the client specifies the manner in which the work is carried out and the required processes. With special sewer cleaning tasks (e.g. cleaning of inverted siphons, cleaning of large profiles, cleaning of sewer film) it can be practical in individual cases to undertake a statement of work with performance programme (functional invitation to tender) (§ 9 No. 10 VOB/A). With this form of statement of work the result of the work sought and all circumstances relevant for the furnishing of the services are described. Thus the selection of the means and the execution of the work within the framework set are left up to the contractor. A statement of work with performance programme for sewer cleaning tasks is only justified if, with special terms of reference, different technical solutions exist and whose selection conveniently is also to be made dependent on the experience of the contractor. In practice, in most cases the statement of work is applied with a specification and schedule of prices together with a service contract. Blanket contracts, if required in combination with a functional description, form exceptions for special cleaning tasks. Even hourly rate of pay contracts and cost reimbursement contracts represent exceptions, whose application in accordance with § 5 No. 2 and 3 VOB/A is limited to narrowly defined extraordinary cases. In this Advisory Leaflet only the statement of work with a specification and schedule of prices is dealt with below. Maintenance cleaning, in accordance with the VOB/A is usually to be offered for tender publicly. With special and extraordinary cleaning a

limited invitation to tender following previous public participant competition is recommended.

3.2

Minimum Contents of a Statement of work

Services are to be described clearly and exhaustively in accordance with § 9 No. 1 VOB/A in order that the calculation of the offers is possible reliably and without extensive preparatory work. Statements of work must therefore contain certain minimum details which are explained in the following sections.

3.2.1

Details on the Type of Cleaning and the Sewers to be Cleaned

The type of cleaning and the sewers to be cleaned are to be described differentiated. To this belong in particular the following tasks: • maintenance cleaning, special cleaning, basic cleaning, • drainage system (combined system, separate system) • types of sewer (wastewater, stormwater, combined wastewater sewer), • types of profile and profile dimensions, • pipe materials in the case of special cleaning, basic cleaning and extraordinary cleaning, • if required, special hydraulic constraints, • if required, possibilities for retention and diversion of wastewater, • if required, details on particular types of deposit which can lead to difficulties, • depths of the manholes, • maximum manhole separation as relevant constraint for the length of the high pressure hose and the scope of work, • materials and special circumstances, which have an influence on the carrying out of sewer cleaning (e.g. previously damaged sewers which may be cleaned with a low pressure only or special structures where sediment washed off can lead to impairment of the function).

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ATV-DVWK-M 197E The length of the sewers to be cleaned is differentiated according to profile dimensions as well as, if required, to types of profile and is to be given graduated according to height of deposit. Here, for the simplification of the statement of work and the rendering of accounts, sewers should be summarised with comparable cleaning expenditure (see Section 2: “Notes on the definition of height of deposit”).

3.2.2

Location of the Manhole Structure and Possibility of Approach by Vehicle

The accessibility and the possibility of approach by vehicle of manholes and structures are to be given. Limitations for the approach by vehicle (e.g. time limits, limitation of axle loads etc) must be described as they can influence execution of the cleaning considerably.

3.2.3

Time Factors for the Execution of the Sewer Cleaning

For the contractor the times allowed for implementation and the chronological sequence of tasks must be clearly visible as essential bases for calculation. Therefore the following details are in particular necessary: • implementation period; • orders are possible for a longer period from 1 to 2 years (annual contracts) or contracts for individual precisely scheduled cleaning measures; with annular contracts it must be stated in which time periods the cleaning tasks are to be completed. • time limit for the commencement of the cleaning tasks by the contractor following request by the client. • working times.

3.2.4

Water for Flushing

The provision of and accounting for the necessary water for flushing are to be described. Particularly necessary are details on:

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• provision of standpipes and accounting modalities, • if required, details on use of special flushing water supply points.

3.2.5

Disposal of the Cleared Materials

The disposal of the cleared materials is an important cost factor with high pressure cleaning. The client must therefore clearly describe the disposal method in the statement of work. For this at least the following details are required: • disposal of the cleared materials by the contractor or by the client, • location of the disposal point, usage conditions and opening times (for disposal by the client), • requirements on the specification of verifications on the correct disposal of the cleared materials in facilities authorised for this (with disposal by contractor), • verification on the amount of cleared material removed, • limitations and notification obligations with peculiarities in the composition of the cleared materials. The client bears the responsibility for the correct declaration under waste law of the cleared materials. He must therefore, if the disposal is to take place through the contractor, describe the composition of the cleared material based on representative analyses or empirical values and to give the waste code number.

3.2.6

Requirements on Cleaning Vehicles

The client has to decide whether he lays down certain vehicles for the execution of the cleaning or leaves the selection to the contractor. Thus, for example, it can be necessary for reasons of the reduction of the use of drinking water with the high pressure cleaning to lay down as far as possible the employment of combined high pressure flushing and suction vehicles with water recycling. The employment of water recycling technology in sewers with small water flow (stormwater sewers, initial sewer sections of wastewater and combined sew-

ATV-DVWK-M 197E ers) is, however, only possible to a limited extent. In these cases it is also possible with high pressure flushing vehicles to transport the deposits over several sewer sections to a main collector and there to first remove it using a combined high pressure flushing and suction vehicle. Bearing in mind an as far as possible economic solution it can be practical to leave to the contractor the selection of the vehicle matched to the respective conditions. In order nevertheless to ensure an effective cleaning minimum requirements should be placed on the vehicles employed. For this the following technical performance characteristics are to be specified particularly: • capacity of the tank, • length of the flushing hose, • capacity (flow rate) of the high pressure pump, • pump pressure, • performance of the suction plant.

3.2.7

Requirements on Personnel

The qualification of personnel is of decisive significance for an effective and correct completion of the tasks. Therefore the following requirements should be placed: • minimum crew size for the cleaning vehicles depending on the sewers to be cleaned. Under normal conditions two persons are sufficient. Through this it is ensured that there can be access to the manholes, for example for the physical inspection of the sewer section, for the attachment of guide rollers or for the removal of stones and bulky objects taking into account the accident prevention regulations. In addition, with this the opening of the manhole cover at the target manholes is possible and the erection and dismantling of the working site safeguards as well as the direction of the vehicle is accelerated. If a physical inspection of the sewer sections is necessary for the cleaning then it is imperative to employ a third person; • specifications for the training of personnel; • specifications for the equipping of personnel with protective clothing;

3.2.8

Determination of Services

In the statement of work it must be clearly regulated in which manner the performance of the contractor is to be determined and brought to account. For this it is necessary to have the contractor produce a daily report. In this report are to be listed the manholes and sewer sections cleaned, the dimensions of their profile, lengths, relevant heights of deposit and the performance positions which are applied for these. The reports are to be signed by the contractor and acknowledged by the client’s supervisor of works by signature. They form as measurement the basis of the accounting. It is urgently recommended that an official acceptance in accordance with § 12 No. 4 VOB/B is agreed in the statement of work and the cleaned manholes and sewer sections accepted daily or weekly together with the contractor. With non-manaccessible sewers this can, for example, be carried out relatively simply and with sufficient accuracy by mirroring. For this it is necessary to state the aim of cleaning as clearly as possible in the statement of work. So far as the term of an invitation to tender covers longer periods of time, the heights of deposits at the time of the establishment of the amount and at the point in time of the implementation of the sewer cleaning can differ from each other. In these cases therefore the carrying out of a joint examination and determination of the actual heights of deposit immediately before implementation is required in order to clearly determine the performance positions which are applied.

3.2.9

Securing the Working Sites

The contractor is to carry out the securing of the working sites in accordance with the road traffic regulations and the accident prevention regulations. For this he must hold ready and erect the necessary traffic signs and installations. Due to the different scope of the measures for the securing of the working sites and the possible limitations with the implementation of the cleaning tasks, a differentiated description of the traffic situation is necessary. With this, for example, the following classes of road can be differentiated:

• specifications for the medical fitness of personnel.

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ATV-DVWK-M 197E • pedestrian zones, • main roads (e.g. with time limitations on cleaning tasks or with special measures for the safeguarding of working sites), • other roads, • sewers in roads, which due to the traffic situation, can be cleaned outside the normal working time only. As a rule the contractor is obliged to obtain an approval from the traffic authority (e.g. Public Affairs Offices). The security measures required for the individual working sites are presented in the arrangements under traffic law in accordance with § 45 StVO. The contractor is to have a copy of the approval available for view in the vehicles. It is to be regulated in the statement of work whether the client or contractor is to carry the costs for the procurement of the approval. The expenditure for the securing of the working sites is, as a rule, to be calculated into the standard price. If, additional security measures, for example for traffic light systems, the resiting of bus stops or additional warning signs are necessary due to special local conditions, these must be reimbursed according to expenditure or separate performance positions must be provided.

3.2.10 Observation of the Accident Prevention Regulations The contractor is to undertake to observe the accident prevention regulations. To this are also included the provision and use of personal safety equipment, the labour preventive medical examination of personnel and the necessary safety measures for work in enclosed spaces of wastewater engineering facilities (e.g. security against falling and monitoring of the atmosphere on entry into manholes).

3.2.11 Liability The contractor is liable for all damage associated with the execution of the tasks. Therefore the furnishing of proof of the existence of third party insurance is to be regulated in the statement of work.

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3.2.12 Cleaning of Stormwater Sewers With the high pressure cleaning of stormwater sewers it must be ensured that the deposits and the flushing water do not sewer section a body of surface water. Therefore it is to be stipulated in the statement of work that the stormwater sewers below the sewer sections to be cleaned are provided with suitable shut-off devices (e.g. sewer shut-off bladders) and the cleared material produced and flushing water are to be sucked out completely.

3.2.13 Additional Services Additional services are those performances which belong to the contractual performance without being mentioned in the contract (VOB/C General regulations for construction works of all types – DIN 18299). To these, for example, belong: • setting up and clearance of the site, • delivery of operating materials, • protection and security measures in accordance with the accident prevention regulations, • measurements for the implementation of and accounting for the services.

3.2.14 Special Services Special services are those performances which only belong to the contractual performance if it is mentioned specifically in the statement of work. To these, for example, belong: • setting up and holding ready installations for the safety of traffic, • disposal of wastes.

3.2.15 Verification of Suitability Sewer cleaning service contracts are, as a rule, awarded following public invitation to tender. Before award of contract the suitability of the bidder is to be checked in accordance with § 25 No. 2 VOB/A. The client must therefore state in the contract conditions documentation which verification the bidder has to present in accordance with § 8

ATV-DVWK-M 197E No. 3 VOB/A for the scrutiny of competence, efficiency and reliability. The verification can, inter alia, be made through reference lists and details on the available vehicles. Cleaning services should be awarded to specialist firms whose equipment and personnel meet certain minimum requirements and have own and outside monitoring facilities. This can, for example, be verified by the possession of a quality mark of the quality association for the manufacture and maintenance of sewers and drains.

4

Model of an Invitation to Tender for Sewer Cleaning Services Using the High Pressure Flushing Process

The following model of a statement of work for the public invitation to tender for sewer cleaning services using the high pressure flushing process represents one possibility for a solution. It includes the invitation to tender for services for the maintenance cleaning of a large sewer network with a term of one year. In this model particular difficulties and other local constraints are taken into account only as examples. This also applies with regard to the security of the working site. It is assumed that the tasks in the sewers are to be carried out in municipal roads, paths and green areas. If sewer cleaning tasks are to be carried out in the area of [Federal German] trunk roads, special requirements on the security of the working site must be taken into account (additional technical contract

conditions and directives for security tasks at working sites on roads (ZTV-SA), Advisory Leaflet on General Conditions for the Necessary Specialist Knowledge on Traffic Safety of Working sites on Roads (In Germany MVAS)). The model can therefore not be applied in practice without being checked and without additional supplements. The fields with grey background are to be completed by the client. The performance positions also cover several requirement positions for the furnishing of sewer cleaning vehicles which are calculated on the basis of operating hours. In accordance with § 9 No. 1 VOB/A the requirement positions may only be included in the statement of work as exceptions. Here they are taken into account as, in practice, exceptional cases are always occurring, which are associated with particular difficulties with cleaning and are still not identifiable at the time of determining the scales (e.g. discharge of sand for a construction site; manholes which, due to other construction tasks are temporarily not accessible). The scope of the requirement positions must be of subordinate significance in relation to the overall performance and may not be taken into account with the valuation of the offers. Only the statement of work is presented in this model. For the supplementing of the contract conditions documentation the special and additional contract conditions applicable with the respective client as well as, if required, further conditions are to added to this.

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ATV-DVWK-M 197E

Breakdown of the statement of work I

II

III

14

Preamble to the specification and schedule of prices 1

Scope of the services and implementation times

2

Execution of the sewer cleaning

3

Requirements on vehicles and equipment

4

Requirements on personnel

5

Traffic and working site safety

6

Flushing water and disposal of cleared material

7

Observance of the accident prevention regulations

8

Determination and acceptance of services

9

Waiting times and obstructions

10

Settlement of accounts

11

Liability

12

Verification of suitability

Specification and schedule of prices 1

Cleaning of sanitary and combined sewers

2

Cleaning of stormwater sewers

3

Other services

Annexes to the specification and schedule of prices Annex 1:

Previously damaged sewer sections

Annex 2:

Roads/streets in which “No Stopping” signs are to be erected

Annex 3:

Transportation certificate

Annex 4:

Certified measurement of the heights of deposit

Annex 5:

Daily report

Annex 6:

Acceptance certificate

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ATV-DVWK-M 197E

I

Preamble to the specification and schedule of prices

1

Scope of services and implementation times

1.1

The statement of work produced here covers the maintenance cleaning of ..... km sanitary sewers, ..... km stormwater sewers and ..... km combined sewers as well as of manhole structures using the high pressure flushing process.

1.2

The implementation times range from ..... up to ..... . Within this implementation time the cleaning services are to be carried out in several linked phases. The contractor is obliged to commence work at the latest ..... weeks following the request of the client.

1.3

It is to be taken into account with the calculation that all standard prices are fixed prices up to the end of the implementation period.

2

Execution of sewer cleaning

2.1

The sewers are located in public metalled roads, paths and places. The manholes are approachable by vehicle with the exception of individual shafts in green areas. The maximum separation of the manholes, which can be approached by vehicle, is ..... m. A particular situation is located in the area of ...... There there is a combined sewer DN ..... (Gradient 1: ..... ), which cannot be approached by a sewer cleaning vehicle for a length of ..... m. The sewer is to be cleaned ..... times within the period. The services necessary for this are calculated in Position 1.5.

2.2

The sewers to be cleaned are to be found within the city/town area. It is intended, to clean completely linked sub-networks. If required, however, individual sewer sections are to be cleaned separately on instructions of the client. The contractor is to receive sewer inventory plans well in time following award of contract. The cleaning programme and the order in which the sewer sections are to be cleaned are determined weekly with the client’ s supervisor of works. Cleaning is to commence at the high points of the sewer network. The deposits to be found in the sub-networks to be cleaned must be removed completely from the sewers. It is to be ensured that no deposits are flushed into downstream sewer stretches, throttle installations and pump inlet chambers which are not to be cleaned. The client’s supervisor of works is to monitor this via measurements of deposits.

2.3

The sewer sections listed in Annex 1 are previously damaged. In these sewer sections cleaning is to be carried out with particular care and with a reduced pressure of ..... bar immediately in front of the jet. A breakdown of the cleaning jet is to be avoided at all costs.

2.4

Cleaning is to be carried out with maintenance of the drainage.

2.5

With the cleaning of stormwater sewers it must be ensured that the cleared material and the flushing water does not get into surface waters. Therefore a sewer shut-off bladder is to be placed at the end of the cleaning section before the start of work and the cleared material and flushing water produced there sucked out.

2.6

The maximum manhole depth is ..... m.

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ATV-DVWK-M 197E 2.7

With each manhole the walls, the step irons, dirt pans and cover seatings are to be cleaned. Damping inserts must be examined and, if required, exchanged. New damping inserts are produced on site. The manhole covers are to be securely closed again after cleaning. Visible damage of the manhole structure is to be noted in the daily reports.

2.8

Work can be carried out on working days from Monday to Friday in the period from ..... h to ..... h. Deviating working times can be agreed with separate constraints. The contractor is responsible for the obtaining of possibly necessary approvals for night work.

2.9

Vehicles can be parked in the service area (address ..... ). The service area is available to the contractor Mondays to Fridays from ..... h to ..... h. The client accepts no liability for the parked vehicles.

2.10 With the cleaning of sewers with small nominal widths up to DN 400 care is to be taken using a suitable arrangement of the suction hose that the cross-section of the sewer section to be cleaned is not reduced and thus air cushions are avoided. The manholes in the sewer sections to be cleaned are to be open during cleaning.

3

Requirements on vehicles and equipment

The client leaves the selection of vehicles to the contractor. In order to guarantee an effective and correct cleaning the following minimum requirements are to be maintained: • the requirements of the [German] Quality Protection Agency for Sewer Construction (Quality Mark R) • cleaning of sewers DN 200 mm - DN 800 mm or appropriate oval profiles: – 10 - 12 m³ capacity, vacuum plant 1,200 – 1,500 m³/h air throughput, suction hoses DN 100 mm - DN 125 mm – flushing hose length > 120 m – pump capacity of ca. 320 l/min, 150 bar pump output pressure, pressure immediately before the cleaning jet 80 - 100 bar • cleaning of the dimensions DN 900 mm - DN 1200 mm or appropriate oval profiles, tapering or special profiles: – 14 - 15 m³ capacity, vacuum plants 1,200 – 1,500 m³/h air throughput, suction hoses DN 125 mm DN 150 mm – suction hose length >120 m – pump capacity ca. 320 - 450 l/min, 150 - 180 bar pump output pressure, pressure immediately before the cleaning jet 80 - 100 bar • the vehicles must satisfy the requirements of the [German] Road Traffic Ordinance (StVO); according to this the vehicle noise limit, depending on the year of construction, may not exceed 80 dB(A) or 84 dB(A). • the vehicles must be equipped with all-round lights and the necessary gas warning, safety and rescue equipment, cover lifting equipment, lamps, climbing aids, shovels, ropes, signs etc.

4

Requirements on personnel

4.1

Vehicle crews must consist of at least two persons. The crew must be trained sufficiently and regularly in-house or by specialist organisations (e.g. DWA [formerly ATV-DVWK], TÜV, TBG). The carrying out of the annual instruction on the accident prevention regulations and the preventative industrial medical examinations (i.a.w. GUV-V A4 and GUV-I 8521, in particular G 20, G 25 and G 26) are to be verified on request.

4.2

Personnel must have available the personal protection equipment in accordance with the accident prevention regulations.

4.3

Personnel of each vehicle must always be available during working hours via ..... .

16

June 2004

ATV-DVWK-M 197E 5

Safety of traffic and of working sites

5.1

The contractor is responsible for the correct security of the working site. The guidelines for the safety of working sites on roads [In Germany RSA, 1995 Edition] are to be observed. The contractor is to carry out the necessary erection of barriers and signs for the control of traffic and for the protection of personnel. The necessary authorisation under traffic law is to be obtained well in time before the start of work from the Municipal Office (address ..... ). The costs for the authorisation, without additional surcharges, are taken over by the client on verification. The contractor’s supervisor of works must have the necessary specialist knowledge. Appropriate verification is to be provided on the request of the client.

5.2

A particular traffic situation is to be found in the following roads ..... . One is concerned here with main roads with high traffic density which are accessible for sewer cleaning vehicles in the period from ..... h to ..... h only. There particular security measures are necessary which result in individual cases from the regulation plans of the RSA as well as from the provisions of traffic law. The expenditure for the safety of the working site in these roads is to be calculated in Position 3.3. A copy of the provisions of traffic law is to be carried on the cleaning vehicles and to be presented to the client’s supervisory personnel.

5.3

In the roads listed in Annex 2 “No Stopping” signs must be erected for the implementation of cleaning. The signs necessary for this are to be erected ..... hours before the start of work and removed immediately after the finishing of work. A max. of two signs per manhole (Traffic Signs 283 StVO) with additional signing (sewer cleaning work with details of the respective date) are to be used. The individual regulations of the provisions of traffic law apply. The signs are to be secured against falling over due to the effects of wind and are to be so placed that they do not lead to traffic hindrance. The settlement of accounts takes place according to Position 3.2 as flat charge per manhole.

6

Flushing water and disposal of cleared material

6.1

The water necessary for the cleaning can be taken from the public drinking water supply system. Standpipes with water meters are to be obtained from the water supply company (address ..... ). Rent for the standpipe meter is ..... €/month (gross), the costs for the drinking water ..... €/m³ (gross).

6.2

The cleared material removed is to be transported to the reception station of the client (address ..... ) and disposed of there. The travel times and the expense for the emptying of the vehicle is calculated into the standard prices. The reception station is open Monday to Friday from ..... h to ..... h. The quantities produced are recorded in a transportation certificate (see Annex 3). The costs for disposal of the cleared material is borne by the client.

6.3

The cleared material is to be continuously monitored by the contractor. With unusual events (peculiar odour, oil films) work is to cease immediately and the client is to be informed. Cleared material already in the vehicle tank may be unloaded only after release by the client.

7

Observation of the accident prevention regulations

7.1

The contractor is responsible for the observance of all relevant laws and regulations for work safety. The cleaning tasks may be carried out only with the observance of the accident prevention regulations. The wearing of personal protective equipment is obligatory.

June 2004

17

ATV-DVWK-M 197E 7.2

Before entering the sewer system facilities the atmosphere is to be tested using multiple gas warning equipment. The client is to be informed about the occurrence of a hazardous atmosphere.

8

Determination and acceptance of the services

8.1

Once a week, before start of work, the heights of deposit in the sewer sections to be cleaned in this period are determined by the client’s supervision of works together with a representative of the contractor. The necessary personnel for the execution of these tasks are provided by the client. The results are recorded by sewer section in protocols (see Annex 4) and signed by both parties. From the recorded deposit heights there result the positions and additional costs to be used with the calculation of the cleaning services.

8.2

In profiles which are not man-accessible (clear width < 1000 mm) the heights of deposit are measured in the first and last pipe of a sewer section using a metre rule. Measurement takes place from the deepest point of the respective cross-section up to the surface of the deposits. The measured deposit heights at the start and end of the sewer section are entered into Columns M1 and M2 in the protocols (see Annex 4). The arithmetic mean of both deposit heights is noted as relevant deposit height in the appropriate column of the protocol. The allocation of performance positions takes place according to the relevant deposit height. A measurement in the manhole channel is not permitted as there the deposit heights can differ from those in the sewer sections through turbulence with large flows. With man-accessible profiles (clear width upwards from 1000 mm) measurements of the deposit heights are carried out at distances of ca. 20 m. The results are noted in the protocols in Columns M1 to M5. So far as it is established through the inspection that the deposit heights do not differ significantly within a sewer section, the distances are increased. The relevant deposit height determined from the arithmetic mean in one sewer section is critical for the allocation of performance positions. If there are local heavy deposits in a sewer section which are significantly above the average deposit height in this sewer section, an as accurate as possible assessment is made. The allocation to performance positions is then undertaken by section. Remuneration is derived from the sum of the products, which result from the length of the individual sewer section sections multiplied by the standard prices for the respective deposit heights. The results of the measurements and the necessary subsidiary calculations are to be documented in the “Remarks” column or on the reverse side of the protocol.

8.3.

All deposits and contamination on the shaft walls, the bottoms of the sewer and manhole channels are to be removed completely through the cleaning. The discharge cross-section is to be washed free over the complete circumference. The number of cleaning passes is to be matched to the contamination. The sewer film and solid deposits such as, for example, hardened concrete, root ingrowths and encrustation remain in the sewers and, if necessary, are removed using separate measures.

8.4

Basis for the determination of the services is the daily report (see Annex 5) signed by the contractor and recognised by the client’s supervision of works. It contains the schedule of the cleaned manholes and sewer sections with details of the manhole number, road name, profile dimensions, relevant deposit heights, lengths of sewer section and the performance positions used as well as, if required, special remarks. The daily reports are produced in duplicate. The first copy is passed to the client with the bill, the second copy remains with the contractor. If several contractor’s vehicles are employed concurrently, a separate daily report is kept for each vehicle. The relevant deposit heights are to be taken from the protocol measurement (see Annex 4).

18

June 2004

ATV-DVWK-M 197E 8.5

The client carries out formal acceptance in accordance with § 12 No. 4 VOB/B. The acceptance is carried out by the client’s supervision of works in the presence of the contractor at the latest 3 days after the cleaning. The monitoring of the cleaning performance takes place optically or through physical inspection with clear heights of more than 1000 mm. The necessary personnel and material for the timely optical and physical inspection are provided by the client. The contractor is responsible for the timely application for acceptance. The result of the acceptance is documented by sewer section and signed by client and contractor (see Annex 6). If defects are found during acceptance the contractor has to carry out a post-cleaning at his own cost and is to request a renewed acceptance.

9

Waiting times and obstructions

9.1

Obstacles or interruptions to work must be indicated without delay by telephone and confirmed subsequently in writing and noted in the daily reports with substantiation. Further action is to be decided with the contractor. The contractor is to take all measures to enable a continuation of work at another point in case of obstruction.

9.2

A remuneration for waiting times with obstruction or interruptions to work takes place only if the client supports this and the length of the waiting time exceeds 1 hour. Waiting times are remunerated only up to the clearance of the obstruction and, as a maximum, for the remaining working time on the respective working day (see Section I 2.8).

10

Settlement of accounts

The contractor has a right to progress payments. Invoices are to be presented in ..... copies with the associated invoice documentation (first copy of the daily report). Only those services can be invoiced which have been accepted by the client. Invoices must be arranged by date. Services are to be listed individually for each working day with details of quantities (length of sewer section, number), the relevant position number as well as the unit and total price. Value Added Tax is to be shown separately.

11

Liability

The contractor is liable for all damage and pollution on public traffic facilities, private drainage facilities, persons and other matters which result in connection with his task. The contractor must verify the existence of third party insurance. He is obliged to provide written indication without delay as soon as his insurance cover no longer exists. The amounts of coverage of the third party insurance must be at least: • For personal damage: ..... € • For other damage: ..... €

12

Verification of suitability

The following documents are to be attached to the offer for examination of suitability: • Turnover of the company in the last three full business years, • Details on the sewer cleaning work carried out in the last three full business years with details on focal points of the respective clients,

June 2004

19

ATV-DVWK-M 197E • Number of the on average employed working staff, broken down into professional groups, • Number of the vehicles available with details of the most important characteristic data in accordance with Section I 3. The applicants for the cleaning of sewers and drains must verify the necessary specialist knowledge, efficiency and reliability as well as quality monitoring – consisting of outside and self-monitoring – with details of the offer. The quality and test conditions of the German Association for the Production and Maintenance of Sewers and Drains are to be met. Verification is considered as proven if the company possesses the RAL Quality Mark of the [German] Quality Association. A contract for outside monitoring for the individual measures can be presented as an alternative. With this the above-named quality and test conditions must be met. Reference sources for the quality and test conditions: • Güteschutz Kanalbau [Quality Protection Sewer Construction], Address ..... • Deutsches Institut für Gütesicherung und Kennzeichnung e.V. [German Institute for Quality Assurance and Designation], Address ..... • ATV – DVWK Deutsche Vereinigung für Wasserwirtschaft, Abwasser und Abfall e.V. [German Association for Water, Wastewater and Waste], Address ..... The client reserves the right to request further verification for the checking of the specialist knowledge, reliability and efficiency of the applicant in accordance with § 8 No. 3 VOB/A.

20

June 2004

ATV-DVWK-M 197E

II 1

Specification and schedule of prices Cleaning of sanitary and combined sewers Preamble to all performance positions: To be calculated into the performance positions are the costs for the vehicles including the journey to and from the site, equipping tasks, accessories, fuel, emptying and cleaning, the necessary vehicle crew, securing of the traffic and working site as well as the expense for the determination and acceptance of the services in accordance with the preamble.

Posn. Statement of work 1.1

Profile size DN 200 – 300 Sanitary and/or combined wastewater sewer DN 200 – 300 in accordance with the preamble, clean, suck out deposits, pre-drain, transport to acceptance station and unload. The deposit height is up to 10 cm. Quantity: ................. m Standard price: ................ €/m

1.2

Total price €

........................... €


........................... €

1.2.1 Profile size DN 350 - 600 As for Position 1.2, however with a deposit height of greater than 10 cm to 20 cm as additional cost to Position 1.2. Quantity: ................. m Standard price: ................ €/m

........................... €

1.2.2 Profile size DN 350 – 600 As for Position 1.2, however with a deposit height of greater than 20 cm to 30 cm as additional cost to Position 1.2. Quantity: ................. m Standard price: ................ €/m 1.3

........................... €


........................... €

June 2004

21

ATV-DVWK-M 197E Posn. Statement of work

Total price €

1.3.1 Profile size DN 650 – 900 As for Position 1.3, however with a deposit height of greater than 5 cm to 10 cm as additional cost to Position 1.3. Quantity: ................ m Standard price: ............... €/m

.......................... €


.......................... €


.......................... €


.......................... €

1.3.5 Profile size DN 650 – 900 As for Position 1.3, however with a deposit height of greater than 25 cm to 30 cm as additional cost to Position 1.3. Quantity: ................ m Standard price: ............... €/m 1.4

.......................... €

Profile size DN 1000 – 1200 Sanitary and/or combined wastewater sewer DN 1000 – 1200 in accordance with the preamble, clean, suck out deposits, pre-drain, transport to acceptance station and unload. The deposit height is up to 5 cm. Quantity: ................ m Standard price: ............... €/m

.......................... €


22

June 2004

.......................... €


Total price €

1.4.2 Profile size DN 1000 – 1200 As for Position 1.4, however with a deposit height of greater than 10 cm to 15 cm as additional cost to Position 1.4. Quantity: ................. m Standard price: ................ €/m

........................... €


........................... €


........................... €


........................... €

Combined sewer DN ..... in ..... Combined sewer DN ..... in ..... in accordance with the preamble Section I 2.1, clean, suck out deposits, pre-drain, transport to acceptance station and deposit. The deposit height is up to ..... cm. Quantity: ................. m Standard price: ................ €/m

........................... €

Net sum for cleaning of sanitary and combined sewers

........................... €

June 2004

23

ATV-DVWK-M 197E 2

Cleaning of stormwater sewers Preamble to all performance positions: To be calculated into the performance positions are the costs for the vehicles including the journey to and from the site, equipping tasks, accessories, fuel, emptying and cleaning, the necessary vehicle crew, securing of the traffic and working site, the expense for the closing off the sewers during cleaning (see Section I 2.5) as well as the expense for the determination and acceptance of the services in accordance with the preamble.


Profile size DN 200 – 300 Stormwater sewers DN 200 – 300 in accordance with the preamble, clean, suck out deposits, predrain, transport to reception station and unload. The deposit height is up to 10 cm. Quantity: ................ m Standard price: ............... €/m

2.2

Total price €

.......................... €

Profile size DN 350 – 600 Stormwater sewers DN 350 – 600 in accordance with the preamble, clean, suck out deposits, predrain, transport to reception station and unload. The deposit height is up to 10 cm. Quantity: ................ m Standard price: ............... €/m

.......................... €


.......................... €

2.2.2 Profile size DN 350 – 600 As for Position 2.2, however with a deposit height of greater than 20 cm to 30 cm as additional cost to Position 2.2. Quantity: ................ m Standard price: ............... €/m 2.3

Profile size DN 650 – 900 Stormwater sewers DN 650 – 900 in accordance with the preamble, clean, suck out deposits, prewater, transport to reception station and unload. The deposit height is up to 5 cm. Quantity: ................ m Standard price: ............... €/m

24

.......................... €

June 2004

.......................... €


Total price €


........................... €


........................... €


........................... €


........................... €


........................... €

Profile size DN 1000 – 1200 Stormwater sewers DN 1000 – 1200 in accordance with the preamble, clean, suck out deposits, prewater, transport to reception station and unload. The deposit height is up to 5 cm. Quantity: ................. m Standard price: ................ €/m

........................... €


........................... €

June 2004

25


Total price €


.......................... €


.......................... €


.......................... €

2.4.5 Profile size DN 1000 – 1200 As for 2.4, however with a deposit height of greater than 25 cm to 30 cm as additional cost to Position 2.4.

26

Quantity: ................ m Standard price: ............... €/m

.......................... €

Net sum cleaning of stormwater sewers

.......................... €

June 2004

ATV-DVWK-M 197E 3

Other services


Clean manholes Completely clean manholes to a depth of max. ..... m in accordance with preamble, i. e. empty dirt pans and dispose of contents, clean step irons, shaft walls and benching, exchange faulty anti-rattle rings; new anti-rattle rings are provided by client. To be calculated into the performance positions are the costs for the vehicles including the journey to and from the site, equipping tasks, accessories, fuel, emptying and cleaning, the necessary vehicle crew, securing of the traffic and working site, the expense for the closing off the stormwater sewers during cleaning (see Section I 2.5) as well as the expense for the determination and acceptance of the services in accordance with the preamble. Quantity:

………….. pce

Standard price: ................ €/pce 3.2

........................... €

Security of traffic in main roads Erection, operation and removal of traffic safety facilities in main roads in accordance with the preamble Section I 5.2. The signing and security of the working site is to be in accordance with the Guidelines for the Security of Working Sites on Main Roads (German: RAS) as well as the specifications of the Municipal Office for traffic regulation. Remuneration is by flat rate per working site. Quantity: ................. pce Standard price: ................ €/pce

3.4

........................... €

„No Stopping“ signs Erection and removal of „No Stopping“ signs in accordance with preamble Section I 5.3. A max. of two signs per manhole are to be calculated including additional signs. To be included in the standard price are all necessary tasks for erection and removal of signs as well as the necessary material. Remuneration is by flat rate per manhole. Quantity: ................. pce Standard price: ................ €/pce

3.3

Total price €

........................... €

Optional position: erection, operation and removal of a traffic light system for traffic control Erection, maintenance and removal of a traffic light system in accordance with the Guidelines for the Security of Working Sites on Main Roads (German: RAS) for traffic control including all necessary signing. Remuneration is by flat rate per deployment (erection and removal) of the traffic light system. So far as the work takes up several days the traffic light system is to be erected and removed daily. Quantity: 1 pce Standard price: ................ €/pce

SP only

June 2004

27

ATV-DVWK-M 197E


Total price €

Optional position: furnishing of a high pressure flushing vehicle Delivery of the high pressure pump at least 320 l/min with an operating pressure of 150 bar at the pump, storage tank at least 8 m³, length of HP hose at least 120 m. To be calculated into the performance positions are the costs for the vehicles including the journey to and from the site, equipping tasks, accessories, fuel, emptying and cleaning, the necessary vehicle crew, securing of the traffic and working site, the expense for the closing off the sewers during cleaning (see Section I 2.5) as well as the expense for the determination and acceptance of the services in accordance with the preamble. Only under instruction of the client. Remuneration is according to hours of usage. Under hours of usage are understood to be only those working hours in which cleaning of the sewer takes place as well as times for the movement of the vehicle from one manhole to another and the equipping times necessary for this. Quantity: 1 hour Standard price: ............... €/hour

3.6

SP only

Optional position: furnishing of a high pressure flushing and suction vehicle with water recycling facility Delivery of the high pressure pump at least 320 l/min with an operating pressure of 150 bar at the pump, vacuum plant 1,200 – 1,500 m³/h rate of air flow, capacity of sludge tank 10 m³, length of the HP hose at least 120 m. To be calculated into the performance positions are the costs for the vehicles including the journey to and from the site, equipping tasks, accessories, fuel, emptying and cleaning, the necessary vehicle crew, securing of the traffic and working site, the expense for the closing off the sewers during cleaning (see Section I 2.5) as well as the expense for the determination and acceptance of the services in accordance with the preamble. Only under instruction of the client. Remuneration is according to hours of usage. Under hours of usage are understood to be only those working hours in which cleaning of the sewer takes place as well as times for the movement of the vehicle from one manhole to another and the equipping times necessary for this. Quantity: 1 hour Standard price: ............... €/hour

3.7

Optional position: remuneration for waiting times Remuneration of the waiting time according to Section I 9 flat rate per hour for the complete cleaning team (personnel including vehicles). Only those waiting hours are remunerated which are supported by the client. Remuneration takes place only for waiting times over one hour duration and max. for remaining working time on that day. Quantity: 1 hour Standard price: ............... €/hour Net sum Other services

28

SP only

June 2004

SP only

.......................... €

III

Annexes to the specification and schedule of prices

Annex 1: Previously Damaged Sewer sections Road

Manhole

Manhole

Type of

top

bottom

sewer

Profile

Length of

Type of damage

Remarks

sewer sec-

29

ATV-DVWK-M 197E

June 2004

June 2004

Road

Manhole

Manhole

top

bottom

Length of sewer section [m]

Type of sign

Remarks

ATV-DVWK-M 197E

30

Annex 2: Roads/Streets in which “No Stopping” Signs are to be erected

Annex 3: Transportation Certificate Operator:

................

Address:

................

Unloading point:

................

Transportation Certificate Firm:

................

Order No.:

................

Address:

................

Unloading date:

................

Vehicle type:

................

Transportation certificate No.:

................

Registered No.:

................

Tank contents [m³]:

................

................

Filling level in the tank following release of water:

................

Volume of the unloaded cleared material:

................

Particular peculiarities of the cleared material:

..............................................................................

June 2004

-----------------------------For the contractor

---------------------------For the client

31

ATV-DVWK-M 197E

Date of start of filling the tank:

June 2004

Date:

................

Representative of the contractor:

................

Representative of the client:

................

Road

Manhole Manhole top bottom


Sewer type

Profile


Measured height of deposit [cm] M1

M2

---------------------------For the client

M3

M4

M5

Relevant height of deposit [cm]

Remarks

ATV-DVWK-M 197E

32

Annex 4: Protocol Measurement of the Deposit Heights

Annex 5: Daily Report

Page 1

Date:

................

Driver:

................

Cleaning vehicle type:

................

Co-driver:

................

Registered No.:

................

Order No.: ................

1.

Cleaning of sewers

Road

Manhole Manhole top bottom

Sewer type

Profile


Relevant height of deposit [cm]

Performance Position No.

Additional price Position No.

Remarks

33

ATV-DVWK-M 197E

June 2004

June 2004

2.

Other services

2.1

Manhole/chamber cleaning:

Road

Page 2

................

Manhole No: ................................

Number: ................

Position No.: ................

Road: ................

Manhole No: ................................

Number: ................

Position No.: ................

Road: ................

Manhole No: ................................

Number: ................

Position No.: ................

Road: ................

Manhole No: ................................

Number: ................

Position No.: ................

2.2

“No Stopping” signs

Road: ................

Manhole No: ................................

Number: ................

Position No.: ................

Road: ................

Manhole No: ................................

Number: ................

Position No.: ................

Road: ................

Manhole No: ................................

Number: ................

Position No.: ................

2.3

Other services

Road: ................

Position No.: ................

Road: ................

Position No.: ................

Remarks:

.............................................................................................................................................................................. ..............................................................................................................................................................................


---------------------------For the client

ATV-DVWK-M 197E

34

Daily Report dated ................

Annex 6: Acceptance Certificate Date:

................

Order No.: ................

Representative of the contractor:................ Representative of the client: Road


Manhole top

................ Manhole bottom

Sewer type

Profile

Length of Cleaning sewer sec- performance tion [m] completed

Post-cleaning on

Follow-up monitoring on

Remarks

---------------------------For the client

35

ATV-DVWK-M 197E

June 2004

ATV-DVWK-M 197E

Bibliography DIN 1960 (December 2002): VOB Vergabe- und Vertragsordnung für Bauleistungen – Teil A: Allgemeine Bestimmungen für die Vergabe von Bauleistungen [Conditions concerning contracts – Part A: General conditions for the award of contract for construction works] DIN 1961 (December 2002): VOB Vergabe- und Vertragsordnung für Bauleistungen – Teil B: Allgemeine Vertragsbedingungen für die Ausführung von Bauleistungen [Conditions concerning contracts – Part B: General conditions for the implementation of construction works] DIN 18299 (December 2002): VOB Vergabe- und Vertragsordnung für Bauleistungen – Teil C: Allgemeine Technische Vertragsbedingungen für Bauleistungen (ATV); Allgemeine Regeln für Bauarbeiten jeder Art [Conditions concerning contracts – Part C: General technical contractual conditions for construction works (ATV); General rules for construction works of all types] Straßenverkehrs-Ordnung (StVO), vom 16. November 1970 (BGBl. I S. 1565, 1971 BGBl. I S. 38); zuletzt geändert durch Artikel 3 des Gesetzes vom 1. September 2002 (BGBl. I S. 3444) [German Road Traffic Ordinance 1970] Richtlinien für die Sicherheit von Arbeitsstellen an Straßen (RSA-Richtlinie) (Ausgabe 1995) [Guidelines for the security of working sites on roads (Issue 1995)]. Köln: Forschungsgesellschaft für Straßen- und Verkehrswesen (FGSV)Verlag, FGSV-Nr. 370

36

June 2004

GUV-V A4 (Januar 1993, in der Fassung vom Januar 1997): UVV Arbeitsmedizinische Vorsorge mit Durchführungsanweisungen [Statutory Accident Insurance (January 1993, edition of January 1997): Accident Prevention Regulations Industrial medicine precautions using implementation instructions] BUK-Regelwerk: Muster-Unfallverhütungsvorschriften GUV-I 8521 (April 1994): Arbeitsmedizinische Vorsorge und Beratung im Abwasserbereich. [Industrial medicine precautions and advice in the field of wastewater]. BUK-Regelwerk: Informationen MVAS (Ausgabe 1999): Forschungsgesellschaft für Straßen- und Verkehrswesen: Merkblatt über Rahmenbedingungen für erforderliche Fachkenntnisse zur Verkehrssicherung von Arbeitsstellen an Straßen [Research Association for Roads and Traffic Matters: Advisory Leaflet on general conditions for necessary specialist knowledge for the traffic safety of working sites on roads] ZTV-SA (Ausgabe 1997): Zusätzliche technische Vertragsbedingungen und Richtlinien für Sicherungsarbeiten an Arbeitsstellen an Straßen [Additional technical contract conditions for safety work at working sites on roads]. Bundesministerium für Verkehr

Reference sources DIN Standard Specifications: Beuth-Verlag GmbH, Berlin GUV Accident Prevention Standards Hauptverband der Unfallkassen e. V. (BUK), München

atv-dvwk_m_197_e

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