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。