Closure sampling

The JACADS closure activities will involve the dismantling and destruction of that portion of the facility that cannot be decontaminated to meet the 5R cleanliness standard. An area decommissioning matrix delineates the areas that will be decontaminated and dismantled, decontaminated and abandoned in place, or solely abandoned in place (U.S. Army, 2000c). The remaining systems, structures, and components (SSCs) that are left in place must meet the Resource Conservation and Recovery Act (RCRA) criteria for decontamination as well as the Army standard of 5R. Areas that were kept free of any agent or hazardous materials will be sampled to demonstrate their cleanliness in accordance with the final closure sampling and analysis plan. 

C3-050 JACADS closure (sampling protocols, etc.) July 2000 Partially approved... 

MTT was used to treat 3500 yd of lead-contaminated soil at a scrap yard in Wisconsin Rapids, Wisconsin. The project included landfiUing the treated soil and an additional 3500 yd of other material, a treatability demonstration, implementation of the remedial action, closure sampling, and preparation and submittal of a documentation report. According to the vendor, the total project costs were approximately 210,000 or 30/yd of soil treated (D13684P, p. 3). 

Since there are no national standards for decontamination, each site requires a specific exposure assessment to determine the appropriate "safe level" of PCDD contamination. The exposure assessment is normally developed as part of the remediation plan and is submitted with the closure sampling plan to the cognizant regulatory agency before beginning work. 

Most closure sampling efforts therefore focus more on the overall level of contamination remaining. In accordance with thq exposure assessment, average contamination levels need to be determined in order to qualify any long-term exposure risk. 

Proper closure sampling normally includes a good, statistically sound sample selection system that generates high and low contact contamination estimates by work zone. Use of such a statistical approach prevents disputes about cleanliness based on one or two positive samples. 

The end result of closure sampling is a series of contamination statistics for different contact surfaces. These data and the exposure model determine the exposure risk to workers. 

Building decontamination technology continues to advance as each project is executed. New technologies are developed for specific applications, and participants gain a better understanding of the importance of exposure assessments, closure sampling, and... 

A study was conducted to determine the methods of protection of emcamide used in water bottle closures. Samples were exposed in QUV and evaluated by oiganoleptic analysis, which searched to determine whether UV radiation and UV absorber could affect oiganoleptic properties of water. ... 

The second section of the spreadsheet contains the overall flows, the calculated component flows, and the material balance closure of each. The weighted nonclosure can be calculated using the random error calculated above, and a constraint test can be done with each component constraint if desired. Whether the measurement test is done or not, the nonclosure of the material balance for each component gives an indication of the validity of the overall flows and the compositions. If particiilar components are found to have significant constraint error, discussions with laboratory personnel about sampling and analysis and with instrument personnel about flow-measurement errors can take place before any extensive computations begin. 

The contract can specify the amount of time the client needs to remove its materials from the toller s facility and lays out notification procedures for dissolving the contract. Chapter 6, Closure and Audit, Example 6-1 is a sample contract termination checklist. It is an illustration of one company s inventoiy list for closing out a tolling project. It addresses material, financial, legal and environmental considerations. 

The toll manager for the client company may prepare a customized checklist as a guide for the closure. Example 6-1, Sample Closure Review Checklist, which begins on the next page, shows a typical list used for contract termination. This example can be used as a template to help companies prepare their own checklist by adding or deleting items as necessary. 

Like any dynamic strain instrument, the RPA readily measures a complex torque, S (see Figure 30.1) that gives the complex (shear) modulus G when multiplied by a shape factor B = iTrR / ia, where R is the radius of the cavity and a the angle between the two conical dies. The error imparted by the closure of the test cavity (i.e., the sample s periphery is neither free nor spherical) is negligible for Newtonian fluids and of the order of maximum 10% in the case of viscoelastic systems, as demonstrated through numerical simulation of the actual test cavity." ... 

SAMPLE CLOSURE is important since it affects the rate of solid state reaction. Consider the foUowing solid state reaction ... 

A special type of homogeneous measurements is found in a compositiorml table which describes chemical samples by means of the relative concentrations of their components. By definition, relative concentrations in each row of a compositional table add up to unity or to 100%. Such a table is said to be closed with respect to the rows. In general, closure of a table results when their rows or columns add up to a constant value. This operation is only applicable to homogeneous tables. Yet another type of homogeneous table arises when the rows or columns can be ordered according to a physical parameter, such as in a table of spectroscopic absorptions by chemical samples obtained at different wavelengths. 

Receipt, identification, storage, and withholding from use of components, dmg product containers, closures, and labeling, pending the appropriate sampling, testing, or examination by the... 

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