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Developing the technical guidance document on data requirements for biocidal products
1998 - IRG/WP 98-50101-02
Finland has been developing a discussion document for EC and the Member States concerning the specified data requirements for 23 biocidal product types, including wood preservatives, and their active substances. This data is required when applying for authorisation for a wood preservative according to the forthcoming Biocides Directive. The data requirements comprise of the core data set, which is common for all product types, and the product type specific additional data sets. The core data set has been outlined in the common position of Biocide Directive adopted by the EU Council and has only been complemented with some technical details. The data required in the additional data set is supplementary to the core data set and it takes into consideration the product type specific properties and direct and indirect human and environmental exposure. At the same time other guides have also been preparing: a guide for risk assessment of active substances by Sweden and a guide for risk assessment of biocidal products by UK. Close cooperation with these projects is an essential part of the preparatory work. After finalizing the draft discussion papers by the end of February 1998 the formal discussion on these will take place with EC and the Member States during 1998. The proposals on the data requirements will be circulated for comments to the EC, the Member States, industry and other interested parties. The final document will be addressed to the authorities and the applicants.
P Karvinen, E Nikunen

What is OECD doing to promote harmonization of biocide regulations
1999 - IRG/WP 99-20182
OECD began work on biocides in 1997 to help Member countries co-operate in the assessment and registration of these products. The work is a part of OECD's Pesticide Programme, and is co-ordinated by the Biocides Steering Group. The goal is to harmonize regulatory approaches to allow countries to conduct evaluations of biocides more efficiently. More efficient evaluations can advance the protection of human health and the environment and result in more timely decisions for industry. The first activity done was the Survey of OECD Member Countries' Approaches to the Regulation of Biocides performed in 1997-1998. The survey collected information on countries' regulatory procedures covering the following aspects: · categorisation, regulation and responsibilities (which ministries are involved) · data requirements (detailed information for each use category) · regulatory procedures · efficacy · labelling requirements · human exposure assessments · environmental exposure assessments · risk assessment · other issues (minor uses, low risk products and biological biocides). It focused on the following seven broad biocide groups: (1) disinfectants/sanitizers; (2) preservatives/ microbiocides; (3) anti-fouling products; (4) wood preservatives and structural treatments; (5) microbiocides for waste disposal and strip mine sites; (6) products used in aquatic non-food sites (molluscides, lampricides, algicides..) and, (7) products used for vertebrate and invertebrate pest control. The new work programme Following completion of the survey, a work programme was agreed by the Pesticide Forum in November 1998. It includes activities in the following six areas: · harmonization of data requirements; · efficacy - testing and acceptability criteria; · development of test guidelines for human health and environmental fate and effects; · hazard/risk assessment - with an emphasis on exposure assessment; · co-operation between countries in biocide reviews; · risk reduction - focusing on information exchange. OECD Specific Activities on Wood Preservatives Activities specific to wood preservatives include: 1. Identification of data requirements for wood preservatives through descriptions of (a) use patterns (b) tasks involved in application, handling methods, etc, and (c) other exposure scenarios that underlie data requirements 2. Exposure assessment of wood preservatives. The objectives of the work on exposure assessment are to (a) exchange information on current approaches in Member countries, and (b) to develop, to the extent possible, a harmonized approach for future use. Two workshops will be held, one related to human exposure, the other to environmental exposure of wood preservatives. The workshops are scheduled to take place in the first half of 2000. 3. The development of a guidance document on efficacy testing and assessment for biocides including wood preservatives. 4. Test guidelines for leaching/migration from treated materials.
M Paneli, N Grandy

Errata in Document NO: IRG/WP/472
1981 - IRG/WP 483
L N Santhakumaran, J C Jain

How to Document the Performance of Super-Critical Treated Wood in above Ground Situations?
2005 - IRG/WP 05-20316
The paper presents practical experiences from the preparation of a new preservative treated wood product for introduction to the market. The product in question is Superwood™, which is treated with organic biocides using CO2 in a supercritical state as a solvent. The question is how to evaluate the performance of a new product such as Superwood™ in order to get an acceptance on the market and fulfil the formal requirements. In the European Union countries, the EN 599-1 is the standard that needs to be complied when approving a new product for the market, but it only focuses on the toxic limit against representative decay fungi according to EN 113. However, decay test, above ground and other forms of field tests are optional, this is not in line with the traditional test philosophy in the Scandinavian countries. The open question is to which extent treatment to the level of the toxic threshold value also ensures a long service life and expected performance of the treated commodity. Superwood™ is evaluated using a strategy, in which basic laboratory tests are done to get the toxic value (according to EN 599-1) and in addition a number of field tests are done including accelerated testing in the tropics. These tests are focussed on the evaluation of the performance criteria such as durability and service life and maintenance requirements. These questions must be answered by the producer without having a full record of performance test for their new products. A short status on the test performed on super-critical treated wood (Superwood™) is presented. Based on a comparison between field test in Scandinavia and in the tropical Malaysia a service life of more than 25 years for a specific supercritical treated product is estimated. It is stated that the existing European standardisation system is insufficient when it comes to service life prediction. A number of important questions need to be addressed by the European standardisation system as soon as possible because the market and the public opinion change quickly due to environmental concern.
N Morsing, A H H Wong, F Imsgard, O Henriksen

Collaborative soft rot tests: PRL tests of Cu/Cr/As preservative using method of Document No: IRG/WP/208
1973 - IRG/WP 223
These tests were undertaken as a preliminary to the next series of collaborative soft rot tests. An interim report has already been presented at Berlin in 1972 as Document No: IRG/WP/211
J K Carey, J G Savory

Supplement to Document No: IRG/WP/56. Health and safety aspects of the use of wood preservatives
1975 - IRG/WP 356
H Willeitner

Collaborative soft rot tests: Interim report on PRL tests of Cu/Cr/As preservative using method of Document No: IRG/WP/208
1972 - IRG/WP 211
Preservative: Tanalith CT.106 - Results obtained with beech are given in the table and indicate a toxic limit of 16.7-19.2 kg/m³ - The initial soil moisture content was adjusted to 27.8% (the water holding capacity). Noticeable drying out has occurred in some of the test bottles.
J G Savory

Errata slip to Document No: IRG/WP/1157
1982 - IRG/WP 1166
K Messner

Appendix to Document No: IRG/WP/1243
1984 - IRG/WP 1244
A Bruce, B King, C Bruce, G M Smith

Errata slip to Document No: IRG/WP/2175
1982 - IRG/WP 2186
R W Berry

Corrigendum to Document No: IRG/WP/121. Monographic information on Lentinus lepideus
1974 - IRG/WP 122
G Seehann, W Liese

Addendum to Document No: IRG/WP/428
1977 - IRG/WP 437
A J Emery

Framework document for an international code of good practices for wood preservation and wood protection (anti-sapstain) facilities
1992 - IRG/WP 92-3683
At the Kyoto meeting, the Health & Safety committee agreed to form a task force to prepare a global plan for writing a code of good practices (Code) for wood protection and preservation facilities (Doc. No. IRG/WP/3681). The Canadian document had been presented to the IRG group earlier (Doc. No. IRG/WP/3447) and similar documents were solicited from other countries for preparing a framework document to assist in the task. Documents were received from Germany, France, UK, and Sweden. These documents provided information on similar efforts toward establishing a Code in those countries. The guiding principles for preparing the Code will be to reduce or eliminate the releases of preservative/anti-sapstain chemicals in the environment and to minimize the workers' exposure to these chemicals for their health and safety. The recommended practices should be based on the current knowledge of existing technology and the physical, chemical, and biological properties of the chemicals. Cooperation of all stakeholders, that is, industry, chemical supliers, regulatory bodies, workers, and other interest groups, in the preparation and approval of the Code should be sought to increase its credibility, usefulness, and effeness. It is proposed to develop a model Code which can be adopted in whole or with modifications in any country, reflecting the site-specific conditions, legislation, and the state of technological sophistication in the industry. The work to date has been conducted ad hoc with the cooperation of Dr. Peek (Germany), Monsieur Ozanne (France), and Dr. Chris Coggins (UK), and the authors acknowledge their assistance in supplying the documents. Based on the available information, it is suggested that the enclosed table of contents be used in the preparation of the framework document for the Code. A task force will be formed to prepare and present the final Code at the next meeting.
V N P Mathur, G Das

Editorial corrections to Document No: IRG/WP/304
1972 - IRG/WP 305

Guidance for corresponding members in preparing annual reports
1995 - IRG/WP 95-60056
IRG Secretariat

Collaborative soft rot tests: Proposed amendments to Document No: IRG/WP/208
1973 - IRG/WP 224
J K Carey, J G Savory

Errata to Document No: IRG/WP/3276
1984 - IRG/WP 3285
W E Conradie

Guidelines for the preparation of an IRG document
2004 - IRG/WP 04-60184
IRG Secretariat

Guidance for corresponding members in preparing annual reports
2003 - IRG/WP 03-60178
IRG Secretariat

Translation of titles of papers listed in Document No: IRG/WP/311
1972 - IRG/WP 312
BAVENDAMM W and W EHLERS: Investigation under conditions similar to those obtained in practice on the impregnation of structural timber by means of brushing and spraying. Holz als Roh- und Werkstoff, 12 (1954) 183 185. BAVENDAMM W and H ANOZYKOWSKI: Investigations under conditions similar to those obtained in practice on the impregnation of structural timber by means of short period dipping and open tank treatment. Holz als Roh- und Werkstoff, 14 (1956) 218 222. BAVEDAMM W: The absorption of preservative by structural timber using manual methods, Holzschutz im Bauwesen, Berlin, W Ernst and Son (1957). BAVENDAMM W and H WILLEITNER: Investigations on the practical application of the bored holes method for the impregnation of structural timber, Holz als Roh- und Werkstoff, 15 (1957) 411 416. BAVENDAMM W and W SCZESNY: Investigations on the practical application of the hot-and-cold open tank process for the impregnation of structural wood, Holz als Roh-und Werkstoff, 15 (1957) 381 384. BAVENDAMM W and U SIUTS: Investigations on the practical application of the bored holes pressure method for the impregnation of structural timber, Holz als Roh- und Werkstoff, 16 (1958) 430 435. BAVENDAMM W and W SCHNEIDER: Investigations on the practical application by brush and open tank for the impregnation of structural timber with bifluorides, Holz als Roh- und Werkstoff, 17 (1959) 284 291. BAVENDAMM W, H WILLEITNER and P KAUNE: Experiments on the treatability of pine and spruce of different cross-sections, Holz als Roh- und Werkstoff, 23 (1965) 363 368.

Errata document for Document NO: IRG/WP/2183
1982 - IRG/WP 2189
Errata (pages 7, 8, 9, & 10) received from Professor João Carlos Moreschi (Brazil) after Document No: IRG/WP/2183 had been circulated.
J C Moreschi

Pentachlorophenol: The non-emotional approach. Second draft: A discussion document
1995 - IRG/WP 95-50040-07
Regulations on PENTA start from a strange story. Often initiated as pure ban in certain countries to provide satisfaction to pressure groups, the increased knowledge of the toxicology has contributed to one of the best documented file concerning a substance widely used as wood preservative. The accumulated documentation on its contaminants and its potentialities as dioxin and furan precursor in certain conditions justify an efficient pressure on initial quality, specifications, conditions of use and destruction. Are we actually able to draw practical conclusions from the enormous amount of work carried out in many countries to address the various questions raised by the chemical and its derivatives? The reply seems positive: the danger is actual, but some simple rules of use may reduce the probability of accidental situation to practically zero. The review explains in which way, regulations only based on intrinsic properties of substances, may appear totally blind if a practical risk/benefit analysis is not considered and proposes: specifications on tracers of impurities, classification of the dangers, identification of the most suitable form to minimize the risk, voluntary limitations of use for sensitive applications, rules of destruction and finally a standard of specifications socially acceptable worldwide.
G Ozanne

Influence of clonal variability on the impregnability of poplar hybrids. (+ correction document of 23 April 1990)
1990 - IRG/WP 3614
The new Western European poplar clones (Populus nigra x deltoides and Populus trichocarpa x deltoides) were compared with the reference clone 'Robusta' and some old hybrids. Samples (5x5x50 cm³) with pure tangential/radial surfaces were sawn, including the transition zone between heartwood and sapwood. Treatment by a standard vacuum-pressure impregnation cycle with CCA showed a range of retentions from 2 to 10 kg/m³ for the 23 poplar clones studied. Only minor differences in impregnability were observed between samples of different trees belonging to the same hybrid. Although the new poplar clones in general show no substantial differences in uptake compared to the reference clone "Robusta" and the older poplar hybrids, the penetration of Cu and As was lower. No relation between wood density and impregnability was found. The radial and tangential penetrations were identical. Cu penetration in sapwood was significantly better than in heartwood. Samples of 1 m length revealed a poor longitudinal penetration.
J Van Acker Van, M Stevens, C De Haas

A report on the development of "Technical Recommendations Document for the Canadian wood preservation and protection facilities"
1987 - IRG/WP 3447
The wood preservation and wood protection industry uses chemicals which are similar. However, because the methods of applications of preservatives are different in wood preservation (pressure treatment) and wood protection (surface treatment) plants, their problems need to be resolved separately. As a part of a federal strategy to protect the environment and human health from potentially toxic commercial chemicals in use in Canada, Environment Canada (EC) decided to develop Technical Recommendations (TR) documents for the Canadian Wood Protection and Preservation facilities. These TR documents define design and operational measures which will protect the environment and worker health. The measures are based on current knowledge of existing technology and current knowledge of physical, chemical and biological properties of the preservative chemicals. A significant amount of background information has been included in the TR documents in order to provide readers with the factual basis which supports the suggested designs and recommended operational practices. Although the recommendations are specific, the focus is on achieving the objectives of protecting the environment and workers from harmful exposure to preservative chemicals. Site-specific circumstances may require the modification of certain recommendations in order to best achieve these objectives.
G Das, V N P Mathur

Comments on soft rot attack in timbers treated with CCA preservatives: A document for discussion
1982 - IRG/WP 1167
This paper is not based on any particular results but rather on several observations of soft-rot during many years of studies, and on a review of the existing literature. The short time available has unfortunately not permitted a detailed review of the literature. Data and knowledge of important facts are lacking for several aspects of soft-rot attack and for reactions occurring in the wood as a result of the treatment with CCA preservatives. This has made several assumptions necessary and a number of suggestions are being made which are not backed up by results. But this document may nevertheless provide a basis for discussions. Hypothesis: (1) Soft rot attack in low susceptibility wood species is prevented at CCA levels which are too low for preventing growth of soft-rot fungi. (2) High susceptibility hardwood species are only temporarily protected by high retentions of CCA. The concentrations of CCA required are so high that they will be expected to considerably effect the grawth of soft-rot fungi. (3) Formation of T-branches is induced by a chemical factor, most probably of carbohydrate nature, in the wood cell walls. (4) The number of sites where this chemical factor occurs is depending on the carbohydrate/lignin ratio. Few sites occur in high lignin timbers whereas a high number of sites can be expected in low lignin timbers. (5) CCA treatment masks or modifies the sites so that the penetrating hyphae are unable to detect them. The masking is complete in timbers with a high lignin content whereby soft-rot attack is prevented. Only partial masking occurs in hardwoods with a low content of lignin which will allow soft-rot attack to occur. But the soft-rot decay rate is such hardwoods treated to high retentions of CCA will be reduced because of the toxic effects of the preservative.
T Nilsson

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