二次容器标准

Secondary containment is required for the storage of all regulated hazardous materials.
CONTAINMENT VOLUME
Secondary containment for a single container (tank) will be 110% of the primary container.
Secondary containment for multiple containers will be, 150% of the largest container's volume OR 10% of the aggregate volumes of all containers, which is greater.
All secondary containment systems open to rainfall must be able to hold 4.5 inches of rainfall in addition to the required secondary containment volume. All secondary containment systems open to fire sprinkler discharge must be able to hold the discharge from all sprinkler heads over the secondary containment system for 20 minutes in addition to the required secondary containment volume.
CONTAINMENT CONSTRUCTION
The secondary containment must be constructed using materials capable of containing a spill or leak for at least as long as the period between monitoring inspections.
OVERFILL PROTECTION
A means of providing overfill protection for any primary container may be required. This may be an overfill prevention device and/or an attention getting high level alarm.
SEPARATION OF MATERIALS
Materials that in combination may cause a fire or explosion, or the production of a flammable, toxic, or poisonous gas, or the deterioration of a primary or secondary container shall be separated in both the primary and secondary containment so as to avoid intermixing.
CONTAINMENT DRAINAGE
The uncontrolled drainage from a secondary containment system is not allowed. Accumulated rainwater or sprinkler flow
water may only be released from a secondary containment system after it has been determined to be non-contaminated. The drainage system must be kept closed or pumps turned off unless the drainage process is being monitored.
EXEMPTION
Storage areas in existence before May 1983 may be exempt from secondary containment requirements provided the following conditions continue to be met:
1. The existing storage method is suitable for the severity of a potential leak or spill.
2. There is no evidence of past or present leakage or spillage of hazardous materials.
3. There is adequate monitoring of the storage to detect any leaks or spills that occur.
4. There is appropriate separation of incompatible materials.
OTHER REQUIREMENTS & SUGGESTIONS
All storage areas must be secured to prevent access by unauthorized personnel.
Secondary containment systems may be covered to prevent rainfall from entering.
Constructed secondary containment systems, i.e., poured pads with berms, must be "lake Tested" to assure that they are leak tight.
Approved coatings must be applied to secondary containment surfaces when spills or leaks would damage or penetrate the uncoated secondary containment system.
Secondary containment systems can be provided through the use of trays or drums placed in over-pack drums as long as all provisions of the secondary containment requirements are met.
1. 容积：独立容器的二次容器的容积设计应当大于基本容器容积的110%；多个容器的二次容器溶剂应当不小于最大容器的容积的150%和所有基本容器容积总和的10%；室外二次容器，除了必要的溶剂承载量以外还应当附加11.43mm 的降雨容积。

所有安装在自动喷淋灭火装置开放区的二次容器，其容积还必须能够承载自动喷水灭火装置的所有排放头20分钟出水量。

2. 容器结构：二次容器用料应当至少保证在两次检查间隔周期内可以正常工作。

3. 防溢保护：所有基本容器应当安装防溢保护装置或高位报警装置。

4. 物料隔离：混合后会起火或爆炸，或生成易燃物、有毒物或毒气，或可使基本容器或二次容器发生破坏的材料应当被分别存放于独立的基本容器和二次容器中以防止发生混合。

5. 二次容器排放：而其容器的排放口禁止随意打开。

雨水或喷淋水只有在被证实为无害后方可排放。

除非排放过程设有有效监控，否则排放口和排水泵应当随时保持关闭。

6. 例外：设施可以满足以下条件：
a) 现有的存储方式可以满足潜在的泄露规模；
b) 无证据显示在过去或将来会发生危险品泄露；
c) 容器设有专用的泄露探测装置；
d) 设有有效的不相容物分流装置。

7. 其他要求与建议：
a) 所有储存区禁止未经认证人员进入；
b) 在二次容器上设置遮盖以防止雨水流入；
c) 修建的二次容器，如护堤，应当经过防漏测试；
d) 如果泄露会导致二次容器未受保护区域受损或渗漏，那么需要在二次容器区域覆盖有效的覆盖物；
在可满足二次容器要求的情况下，还可利用放置在材料二层包装桶内的盘子或桶作二次容器。