Hold, test and release

Recently, two alterations to the baseline incineration process have been considered, charcoal filter beds or a hold, test, and release system. In February 1994, NRC recommended the study of activated charcoal filter beds as an addition to the baseline incineration process. The Army and EPA also endorse the addition of charcoal filter beds to baseline incineration because it would further eliminate the risk of toxic air... 

The addition of a hold, test, and release system could instill a greater level of public confidence, as it would virtually eliminate the risk of toxic air emissions. 

The hold, sample, and release option was not included in the Demo II tests. All gas analyses were performed on samples taken from the flowing off-gases over 2-hour periods. Techniques for sampling and ensuring that no agents are present prior to release will have to be developed and confirmed in subsequent programs. 

Software often contains so-called assertions preconditions defined by developers in the code. If the precondition does not hold, the software will be halted. Often these assertions are only used during development and are disabled during final testing and release. In this project we decided to leave the assertions enabled. It is better to have a system that has safely halted, than to have a system running, but in an undefined state. Of course this approach is not always the best to choose. In environments where availability of the system is more important than the quality of the system, it can be decided to disable the assertions and keep the system running in case of such an assertion. 

In continuous production, product is inspected by taking samples from the line which are then examined while the line continues producing product. In such cases you will need a means of holding product produced between sampling points until the results of the tests and inspections are available. You will also need a means of releasing product when the results indicate that the product is acceptable. So a Product Release Procedure or Held Product Procedure may be necessary. The standard implies, however, that if you have released product under positive recall procedures you do not need to hold product while in-process inspection and tests are performed. The reference to clause 4.10.3(a) is also ambiguous because the inspections and tests carried out in accordance with the quality plan or documented procedures may not cover those necessary to verify product on receipt into the plant. It would be wise to hold any product until you have... 

Quench elbow and secondary scrubber. This system is used to remove acid gases formed from the catalytic oxidation of halogenated organic compounds. The operation of the secondary scrubber is identical to that of the primary scrubber with the exception of a recirculation cooler that maintains scrubber exit gas temperature at 120°F. The secondary scrubber has a constant liquid blowdown that is collected in holding tanks and tested for agent prior to release. 

The environmental impact of the proposed GATS process appears to be minimal. All handling and processing of agent will be conducted indoors in sealed rooms that are vented through HEPA and carbon filters. Liquid and solid waste streams will be relatively small and manageable and will be subjected to hold-test-release procedures. 

Hold the product until the required inspection and tests have been completed or necessary reports have been received and verified, except when the product is released under positive recall procedures (see 4.10.1). Release under positive recall procedures does not preclude the inspection, testing, and identification of the product as required by the quality plan or documented procedures. Product conformance is established to specified requirements by use of process monitoring and control methods. 

Before you can run your test you need a strip of unexposed but developed and fixed film. Four blank frames of 6 X 6, or 3 blank frames of 6 X 7, or 5 to 6 blank frames of 35 mm, etc. So that you don t forget do it at the beginning of the roll. Hold the lens against your chest, set the f/stop to 16 and the shutter speed at its fastest setting, and release and cock the shutter the appropriate number of times. The remaining film is yours to do as you like. 

A Qualitative Tests. Hold an unmarked TD strip at each end. Quickly pull the strip apart and observe the behavior Take another strip, and this time start to pull the strip slowly, then release. What do you observe Repeat the pulling and releasing, but each time pull a little harder. Finally, slowly pull the strip, keeping force on it without releasing it. Watch various parts of the strip as you stretch it. It might be instructive to hold each strip up to the light and look through it as you stretch them. Repeat these operations with strips cut in the machine direction. Record your observations and note whether the MD and TD strips exhibited the same behavior. 

Metals Test is more of a release test and would not be used for stability. The stability criteria are the limits for each test, defining that a product is stable. Typically these are the same values as the specification limits for a product, but tighter limits may be used. The same holds true for the test methods because these are typically the same as the methods found in the specifications. 

Destruction verification capability. Whether the agent destruction can be confirmed before the liquid or gas is released to secondary treatment (hydrolysate disposal or offgas treatment) may be a consideration that is important to public stakeholders and regulators. This is often referred to as a hold-test-release capability. 

The EDS-2 produces a relatively large volume of secondary waste in liquid form, 8-10 gallons per detonation. This is a disadvantage vis-a-vis the other technologies. The EDS has a hold-test-release capability for the liquid waste to ensure that agent destruction has been completed before the waste is released from the unit and passed to storage. 

With the addition of two valves, one on the air inlet to the chamber and one on the exhaust pipe from the chamber, the Dynasafe SDC2000 could conceptually be operated in a hold-test-release mode, although operating it in this way would reduce throughput and would require a redesign of the offgas treatment system. This two-valve concept has been proposed but not built or operated. ... 

The primary concern with the TDC from a RCRA permitting perspective is the operation of the CATOX thermal treatment unit and the lack of a hold-test-release capability for the offgas. There may be some... 

The main concern with the Dynasafe technology from the perspective of RCRA permitting would be the operation of the secondary combustion thermal treatment unit and the absence of a hold-test-release capability for the offgas. Technically, because the secondary combustion unit will employ an open flame, it would be defined as incineration. This could be a concern for public interest groups, which have long opposed incineration technologies, particularly for chemical agents. To avoid this, Dynasafe has proposed the use of a flameless thermal oxidizer in place of secondary combustion. 

The TC-60 TDC has been permitted and operated in the United States, and no public or regulatory opposition was encountered in the process. However, it does not have the hold-test-release feature of the DAVINCH. The TDC is rated a 9. 

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