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3704.2.1 Applicability. The applicability of regulations governing the indoor storage and use of highly toxic, toxic, and moderately toxic compressed gases shall be as set forth in Sections 3704.2.1.1 through 3704.2.1.3. Amend Sec. 3704.2.1.1 to read: 3704.2.1.1 Quantities Not Exceeding the Maximum Allowable Quantity per Control Area. The indoor storage or use of highly toxic, toxic and moderately toxic gases in amounts exceeding the threshold quantity per control area set forth in Table 3704.2 shall be in accordance with Sections 2701, 2703, 3701, 3704.1 and 3704.2, Amend Sec. 3704.2.2 to read: 3704.2.2 General Indoor Requirements. The general requirements applicable to the indoor storage and use of highly toxic and toxic compressed gases shall be in accordance with Sections 3704.2.2.1 through 3704.2.2.10.3. Moderately toxic gases with an LC50 less than 3000 parts per million shall comply with the requirements for toxic gases in Sections 3704.2.2.1 through 3704.2.2.10.3 All other moderately toxic gases exceeding the threshold quantity shall comply with the requirements for toxic gases in Sections 3704.2.2.1 through 3704.2.2.7. Amend Sec. 3704.2.2.7 to read: 3704.2.2.7 Treatment Systems. The exhaust ventilation from gas cabinets, exhausted enclosures, gas rooms and local exhaust systems required in Section 3704.2.2.4 and 3704.2.2.5 shall be directed to a treatment system. The treatment system shall be utilized to handle the accidental release of gas and to process exhaust ventilation. The treatment system shall be designed in accordance with Sections 3704.2.2.7.1 through 3704.2.2.7.5 and Section 505 of the California Mechanical Code. EXCEPTIONS:: 1. Highly toxic, toxic and moderately toxic gases storage. A treatment system is not required for cylinders, containers and tanks in storage when all of the following are provided: 1.1 Valve outlets are equipped with gas-tight outlet plug or caps. 1.2 Hand wheel-operated valves have handles secured to prevent movement. 1.3 Approved containment vessels or containment systems are provided in accordance with Section 3704.2.2.3. Amend 3704.2.2.10.1 to read: 3704.2.2.10.1. Alarms. The gas detection system shall initiate a local alarm and transmit a signal to a constantly attended control station when ashort-term hazard condition is detected. The alarm shall be both visual and audible and shall provide warning both inside and outside the area where the gas is detected. The audible alarm shall be distinct from all other alarms. Amend Section 3704.3 to read: ioo