Manufacture inadvertent

In addition, special post-repair cleaning and calibration requirements should be developed to prevent inadvertent manufacture of a nonconforming product. Planning during the qualification phase can prevent confusion during emergency repairs that could lead to the use of the wrong replacement part. 

Inadvertent manufacture of unintentional impurities is not prohibited, if regulations are followed... 

A small rupture disc failed to operate it was then found that the manufacturer had inadvertently supplied two discs that nested one on top of the other and appeared to be one. Most discs are individually boxed, but some are supplied stacked and should be carefully checked. Some small discs are supplied with gaskets already glued to them, and these are particularly likely to stick together. 

There are many process contaminants that may be inadvertently carried back with the condensate following either the purposeful injection of live steam into, say, an industrial manufacturing process or that can infiltrate the system due to a leaking heating coil, an open surge tank, or similar access point. 

As you heard this morning from several speakers, the premanufacture notification provision of TSCA has been in effect since July 1, 1979 and since then EPA has received over 1,000 notices of intent to manufacture and introduce new chemicals into U.S. commerce. This is the only complete and accurate record of the development and commercialization of new chemicals ever compiled and, as such, is a repository of a wealth of information. A major portion of it is classified by EPA as confidential business information - CBI in our lingo - and is closely protected against inadvertent disclosure. 

Note that positive measures can be taken to eliminate the potential for inadvertent mixing such as by storage segregation, elimination of excess inventory, just-in-time delivery, or in-situ manufacturing. If so, then you may be able to significantly reduce the number of potential scenarios that need evaluation. 

Hexachlorobutadiene was first prepared in 1877 by the chlorination of hexyl oxide (lARC 1979). Commercial quantities of hexachlorobutadiene have never been produced in the United States. The primary source of hexachlorobutadiene found in the United States is inadvertent production as a waste by-product of the manufacture of certain chlorinated hydrocarbons, such as tetrachloroethylene, trichloroethylene, and carbon tetrachloride (ERA 1980 Yang 1988). In 1982, ERA reported an annual volume of about 28 million pounds of hexachlorobutadiene inadvertently produced as a waste by- product from this source (ERA 1982b HSDB 1993). Table 4-1 summarizes information on U.S. companies that reported the production, import, or use of hexachlorobutadiene in 1990 based on the Toxics Release Inventory TRI90 (1992). The TRI data should be used with caution since only certain types of facilities are required to report. This is not an exhaustive list. 

The manufacturing direction is provided with literature indicating the operating status of structures, systems, and components to prevent inadvertent operation and mrx-up. 

By-product disposal from vinyl chloride manufacturing plants is complicated by the need to process a variety of gaseous, organic liquid, aqueous, and solid streams, while ensuring that no chlorinated organic compounds are inadvertently released. Each class of by-product streams requires its own treatment and disposal system. 

Like CNG dispensing nozzles, CNG dispensing hoses have finite lifetimes— often measured in the number of refuelings completed. When the lifetime of the hose has been exceeded, it should be replaced to prevent inadvertent failure during use. Hose manufacturers will have guidelines for determining when their hose should be replaced. 

The first part of the following analysis considers the toxic metals in this waste and evaluates the waste for near-surface disposal. In a second part of this example, the waste is presumed to be contaminated by 137Cs from sources inadvertently included in scrap metals that are recycled into the manufacturing process. 

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