Committee of Experts on the Transport of Dangerous Goods and on the Globally Harmonized System of Classification and Labelling of Chemicals
Sub-Committee of Experts on the Transport of Dangerous Goods
Forty-first session
Geneva, 25 June – 4 July 2012
Item 3 (b) of the provisional agenda
Listing, classification and packing: miscellaneous
Special Provision 335: Exemption for small quantities of environmentally hazardous substances
Transmitted by the International Council of Chemical Associations (ICCA)
Introduction
1. At the 40th session of the Sub-Committee the industry presented a proposal for extension of special provision 335 (ST/SG/AC.10/C.3/2011/42). This special provision permits the exemption of small quantities of solid environmentally hazardous substances (up to 10 g) and liquid environmentally substances (up to 10 ml) absorbed in a solid. The industry has a strong demand to exempt also small amounts of liquids, mainly for distribution of consumer commodities. The concept of the industry proposal was, to extend the special provision to liquids in a comparable small quantity (up to 10 ml) and with additional packing provisions to compensate the higher risk because of the liquid state.
2.  Although some experts believed that the proposal had merit, others considered that the current provisions were satisfactory and that there was no need to complicate the Model Regulations. Many comments suggested using the existing provisions for small quantities, i.e. the provisions for dangerous goods packed in limited quantities or in excepted quantities. If these would not be sufficient, preference was given to extending these provisions rather than SP 335.
3.  Taking into account these comments, ICCA revised its proposal accordingly by proposing to amend the existing provisions for dangerous goods packed in excepted quantities.
4.  If the proposed amendments to the Excepted Quantity provisions would not be acceptable, ICCA would then still be in favour of extending the existing SP 335. The proposal in document ST/SG/AC.10/C.3/2011/42 has been amended taking into account the comments received during the discussion during the 40th session and is herewith attached in annex to this proposal.
  Justification
5.  The proposal introduces a new Exempted Quantity Code E6 in 3.5.1.2. This code should only be assigned to environmentally hazardous substances of UN 3077 and 3082. The assignment of larger quantities (300 ml for liquids and 600 grams for solids) can be justified by the packing provisions for Excepted Quantities, which are much stricter than for transport of UN 3077 and 3082 without exemptions.
6.  Additionally in section 3.5.1.4 (“de minimis provisions”) quantities of 10g and 10 ml have been assigned to Code E6. These quantities are the same which are used in the current special provision 335. The extension to liquid substances is justified by the stricter packaging provisions and the limitation of the maximum net quantity.
7.  A barrier for efficient use of the exempted quantity provisions for the distribution of consumer commodities is the limitation of the maximum number of packages in 3.5.5. In principle, we see no reason to limit the package number for these extreme small amounts of substances per package. But to keep the same safety level, we propose to introduce marking provisions in 3.5.5 for cargo transport units carrying more than 1.000 excepted quantity packages. Consequentially the number of packages would no longer have to be indicated on a transport document as required in 3.5.6 if the transport unit would be marked according to 3.5.5.
8.  Because of these extra provisions ICCA believes that this proposal provides an adequate level of safety.
  Proposal
9. Amend the following sections in chapter 3.5 to read (new text in bold and underlined):
3.5.1.2  Dangerous goods which may be carried as excepted quantities in accordance with the provisions of this Chapter are shown in column 7b of the dangerous goods list of Chapter 3.2 by means of an alphanumeric code as follows:

For gases, the volume indicated for inner packagings refers to the water capacity of the inner receptacle and the volume indicated for outer packagings refers to the combined water capacity of all inner packagings within a single outer packaging.
3.5.1.4  Excepted quantities of dangerous goods assigned to codes E1, E2, E4, E5, and E6 are not subject to these Regulations provided that:
(a)  The maximum net quantity of material per inner packaging is limited to 1 ml for liquids and gases and 1 g for solids, for E1, E2, E4, and E5, and to 10 ml for liquids and 10 gr for solids for E6;
(b)  The provisions of 3.5.2 are met, except that an intermediate packaging is not required if the inner packagings are securely packed in an outer packaging with cushioning material in such a way that, under normal conditions of transport, it cannot break, be punctured, or leak its contents; and for liquid dangerous goods, the outer packaging contains sufficient absorbent material to absorb the entire contents of the inner packagings;
(c)  The provisions of 3.5.3 are complied with; and
(d)  The maximum net quantity of dangerous goods per outer packaging does not exceed 100 g for solids or 100 ml for liquids and gases for E1, E2, E4, and E5, and 500 gr for solids and 500 ml for liquids for E6.
3.5.2  Packagings
Packagings used for the transport of dangerous goods in excepted quantities shall be in compliance with the following:
(a) … ;
(b) Each inner packaging shall be securely packed in an intermediate packaging with cushioning material in such a way that, under normal conditions of transport, it cannot break, be punctured or leak its contents. The intermediate packaging shall completely contain the contents in case of breakage or leakage, regardless of package orientation. For liquid dangerous goods, the intermediate packaging shall contain sufficient absorbent material to absorb the entire contents of the inner packaging. In such cases, the absorbent material may be the cushioning material. Dangerous goods shall not react dangerously with cushioning, absorbent material and packaging material or reduce the integrity or function of the materials;
In case the inner packaging passes the drop test prescribed in 3.5.3, cushioning material and/or absorbent material may be placed in the outer packaging instead of the intermediate packaging.
(c)  … ;
3.5.5 Maximum number of packages in any freight vehicle, railway freight wagon or multimodal freight container
The number of packages in any freight vehicle, railway freight wagon or multimodal freight container shall not exceed 1 000.
In case the number of packages exceeds 1000 or the number of packages is not counted, the transport units shall be marked in accordance with 3.5.1 (size 200 mm x 200 mm), without indicating the classes and the name of the consignor or of the consignee) at the positions required for placards except when placards or marks in accordance with chapter 5.3 are displayed.
 
3.5.6 Documentation
If a document (such as a bill of lading or air waybill) accompanies dangerous goods in excepted quantities, it shall include the statement “Dangerous Goods in Excepted Quantities” and indicate the number of packages.
The number of packages needs not to be indicated, if the transport unit is marked as described in 3.5.5
Consequential amendment:
In column (7b) of the dangerous goods list in chapter 3.2 replace “E1” by “E6” for UN 3077 and UN 3082.

Annex
  Alternative proposal to amend SP335 (new text underlined).
335 Mixtures of solids which are not subject to these Regulations and environmentally hazardous liquids or solids shall be classified as UN 3077 and may be carried under this entry provided there is no free liquid visible at the time the substance is loaded or at the time the packaging or cargo transport unit is closed. Each cargo transport unit shall be leakproof when used as a bulk container. If free liquid is visible at the time the mixture is loaded or at the time the cargo transport unit is closed, the mixture shall be classified as UN 3082. Sealed packets and articles containing less than 10 ml of an environmentally hazardous liquid, absorbed into a solid material but with no free liquid in the packet or article or containing less than 10 g of an environmentally hazardous solid are not subject to these Regulations. Inner packagings containing not more than 10 ml of an environmentally hazardous liquid packed in a combination packaging not exceeding 30 kg total gross mass conforming to general packing provisions 4.1.1.1, 4.1.1.2, 4.1.1.4, and 4.1.1.8 and meeting the construction requirements of 6.1.4 are not subject to these Regulations, if the packaging is designed to prevent the release of the liquid content  by using an intermediate packaging (plastic bag, blister or similar) or  by adding absorbing material in a part of the packaging (outer or intermediate packaging).
   

联合国危险货物运输专家和全球化学品统一分类和标签制度专家委员会
危险货物运输专家分委员会
第四十一次会议
日内瓦, 2012年6月25日-7月4日
议程第3(b)项
列表、分类和包装：杂项
  特殊规定335: 小量危害环境物质的豁免
  化学协会国际理事会(ICCA)提交 
  介绍
1. 在第40次分委员会会议上行业提出了扩展特殊规定335(ST/SG/AC.10/C.3/2011/42)的提议。该特殊规定允许对少量的固体危害环境物质（最高10g）和用固体吸收的液体危害环境物质（最多10ml）的豁免。行业也强烈要求对主要作为消费商品的少量液体的豁免。行业提议的想法是，将比较少量（最多10ml）的液体扩展到特殊规定里，并提出附加包装规定，来弥补液体状态带来的较高风险。
2.  尽管一些专家认为该提议可取，但其他人认为现行的规定是令人满意的，没有必要将规章范本复杂化。许多意见建议对小量货物就使用现有的规定，即数量有限或例外数量包装的危险货物的规定。如果这些是不够的，优先考虑扩展这些规定而不是特殊规定335。
3.  考虑到这些意见，ICCA修改了该提案，建议对例外数量包装的危险货物的现存规定进行修订。
4.  如果对例外数量规定的修订建议不被接受，ICCA仍将致力于扩展现有的特殊规定335。文件ST/SG/AC.10/C.3/2011/42中的提议已经被修改，考虑了第40次年会上得到的意见，该修改提议在附件中给出。
  理由
5.  本提案提出了在3.5.1.2中引入一个新的例外数量编码E6。此编码只应指定给UN3077和3082的危害环境物质。大量物质（液体300ml和固体600g）的例外数量包装条款，远严于非例外的UN3077和3082的运输条款。
6.  此外，在3.5.1.4节（微量规定）中10g和10ml的数量已经指定到编码E6。这些数量与当前特殊规定335是相同的。扩展到液体物质使包装条款更加严格并且限定了最大净数量，因此是合理的。
7.  对消费商品分配的例外数量规定有效利用的障碍是3.5.5中对包装件的最大数量限制。原则上，我们没有理由限制每包装件内含极少量物质的包装数。但为了保持相同的安全水平，我们建议在3.5.5中对超过1000个例外数量包装的货物运输单元引入标记规定。如果运输单元根据3.5.5的要求进行标记的话，相应的包装数量将不再需要根据3.5.6的要求在运输文件上标明。
8.  因为这些额外的规定，ICCA认为这项提案提供了足够的安全水平。
  提议
9. 修改以下第3.5章的部分（新的文本是加粗并加下划线的）：
3.5.1.2  根据本章的规定，可作为例外数量运输的危险货物，在第3.2章危险货物一览表的第7b栏中，使用以下字母数字编码表示：
 

对气体而言，内包装标明的容量系指内容器的水容量；外包装标明的容量系指在一个外包装内所有内包装水容量之总和。
3.5.1.4  划定给编码E1、E2、 E4、E5和 E6的例外数量的危险货物如满足以下要求不受本规章的限制：
(a)  对E1, E2, E4, and E5，每个内包装的最大净数量被限制为液体和气体1ml以及固体1g，对E6限制为液体10ml和固体10g。
(b)  除了当内包装能通过衬垫材料安全固定在外包装内，在正常运输条件下不会破裂、穿孔、或内装物泄漏时，不需要中层包装之外， 3.5.2的规定需要满足；并且对液体的危险货物，外包装含有足够的吸收材料能吸收内包装的全部内装物；
(c)  需遵守3.5.3的规定；和
(d)  对E1, E2, E4, and E5，每个外包装的危险货物的最大净数量不超过固体100g或液体和气体100ml，对E6不超过固体500g和液体500ml。
3.5.2  包装
用于运输例外数量的危险货物的包装，须符合以下要求：
(a) … ;
(b) 每个内包装都必须牢靠地装在带衬垫材料的中层包装中，使之在正常运输条件下不会破裂、穿孔或内装物泄漏。在发生破裂或泄漏的情况下，不论包装件的方向如何，中层包装都必须能够完全盛载内装物。装载液体的危险货物的中层包装，必须含有足够的吸收材料，可吸收内包装的全部内装物。在这种情况下，吸收材料可以使衬垫材料。危险货物不得与衬垫材料、吸收材料和包装材料产生危险反应，或降低材料的完整性或作用；
如果内包装通过了3.5.3规定的跌落试验，衬垫材料和/或吸收材料可放置在外包装中而不是中层包装中。
(c)  … ;
3.5.5 任何货运车辆、铁路货车或多式联运货物集装箱可装载的包装件的最大数量
任何货运车辆、铁路货车或多式联运货物集装箱可装载的包装件的最大数量不得超过1000个。
如果包装件的数量超过1000个或者包装件数量未计，运输单元应按照3.5.1在揭示牌所要求的位置进行标记（大小为200mm×200mm，不需标明类别和托运人或者收货人的名字），已根据第5.3章中标注或标记的除外。
 
3.5.6 单证
如果单证（如提单或空运货单）显示有例外数量的危险货物，则应注明“例外数量的危险货物”，并注明包装件的数量。
如果运输单元已按3.5.5描述的进行标记，包装件的数量则不需要标明。
相应修订：
在第3.2章危险货物列表的第7b栏中，为UN3077和UN3082用“ E6”代替 “E1”。

附件
修订SP335的替代提案（下划线的为新文本）
335 不受本规章范本限制的固体混合物，以及分类应划入UN 3077的危害环境的液体或固体，可在本条目下运输，条件是在装载物质时，或在封闭包装或货物运输装置后，表面无自由液体。每个货物运输装置在作为散装货箱使用时，必须防漏。如果在装载混合物时，或在封闭包装或货物运输装置后，表面有自由液体，该混合物应划为UN3082。装载有危害环境的液体，容量小于10mL，用固体物质吸收，包裹或物品表面无自由液体，或装载有危害环境的小于10g固体的密封小包裹和物品，不受本规章范本的限制。如果包装能通过使用中层包装（塑料袋，吸塑包装或类似包装），或在包装（外包装或中层包装）内增加吸收材料来防止液体泄漏的话，含有≤10mL危害环境液体的内包装，放在总重不超过30kg的组合包装中，并符合一般包装要求4.1.1.1, 4.1.1.2, 4.1.1.4和 4.1.1.8，以及6.1.4中的结构要求的，不受本规章范本的限制。