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4.1 This guide describes a general approach for the use of existing wells in environmental investigations with a primary focus on the subsurface and major factors affecting the surface and subsurface environment.4.2 Existing wells represent a valuable source of information for subsurface environmental investigations. Specific uses of existing wells include:4.2.1 Well driller logs provide information on subsurface lithology and major water-bearing units in an area. Existing wells can also offer access for downhole geophysical logging for stratigraphic and aquifer interpretations. Examples include natural gamma logs in cased wells and an entire suite of methods in uncased bedrock wells (see Guide D5753). This information can assist in developing the preliminary conceptual model of the site.4.2.2 Well tests using existing wells may provide information on the hydrologic characteristics of an aquifer.4.2.3 Monitoring of water levels in existing wells, provided that they are cased in the aquifer of interest, allow development of potentiometric maps and interpretations of groundwater flow directions and gradients.4.2.4 Existing wells are the primary means by which regional drinking water quality is evaluated and monitored.4.2.5 Existing wells may assist in the mapping of contaminant plumes, and in ongoing monitoring of groundwater quality changes at the site-specific level.4.3 Data from existing wells should only be used when characteristics of the well have been sufficiently documented to determine that they satisfy criteria for the purpose for which the data are to be used.1.1 This guide covers the use of existing wells for environmental site characterization and monitoring. It covers the following major topics: criteria for determining the suitability of existing wells for hydrogeologic characterization and groundwater quality monitoring, types of data needed to document the suitability of an existing well, and the relative advantages and disadvantages of existing large- and small-capacity wells.1.2 This guide should be used in conjunction with Guide D5730, that provides a general approach for environmental site investigations.1.3 This guide does not specifically address design and construction of new monitoring or supply wells. Refer to Practices D5092 and D5787.1.4 This guide does not specifically address groundwater sampling procedures. Refer to Guide D5903.1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.1.7 This guide offers an organized collection of information or a series of options and does not recommend a specific course of action. This guide cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this guide may be applicable in all circumstances. This guide is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this guide be applied without consideration of a project's many unique aspects. The word “Standard” in the title of this document means only that the document has been approved through the ASTM consensus process.

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4.1 This guide describes a general approach for the use of existing wells in environmental investigations with a primary focus on the subsurface and major factors affecting the surface and subsurface environment.4.2 Existing wells represent a valuable source of information for subsurface environmental investigations. Specific uses of existing wells include:4.2.1 Well driller logs provide information on subsurface lithology and major water-bearing units in an area. Existing wells can also offer access for downhole geophysical logging for stratigraphic and aquifer interpretations. Examples include natural gamma logs in cased wells and an entire suite of methods in uncased bedrock wells (see Guide D5753). This information can assist in developing the preliminary conceptual model of the site.4.2.2 Well tests using existing wells may provide information on the hydrologic characteristics of an aquifer.4.2.3 Monitoring of water levels in existing wells, provided that they are cased in the aquifer of interest, allow development of potentiometric maps and interpretations of groundwater flow directions and gradients.4.2.4 Existing wells are the primary means by which regional drinking water quality is evaluated and monitored.4.2.5 Existing wells may assist in the mapping of contaminant plumes, and in ongoing monitoring of groundwater quality changes at the site-specific level.4.3 Data from existing wells should only be used when characteristics of the well have been sufficiently documented to determine that they satisfy criteria for the purpose for which the data are to be used.1.1 This guide covers the use of existing wells for environmental site characterization and monitoring. It covers the following major topics: criteria for determining the suitability of existing wells for hydrogeologic characterization and groundwater quality monitoring, types of data needed to document the suitability of an existing well, and the relative advantages and disadvantages of existing large- and small-capacity wells.1.2 This guide should be used in conjunction with Guide D5730, that provides a general approach for environmental site investigations.1.3 This guide does not specifically address design and construction of new monitoring or supply wells. Refer to Practices D5092/D5092M and D5787.1.4 This guide does not specifically address groundwater sampling procedures. Refer to Guide D5903.1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.7 This guide offers an organized collection of information or a series of options and does not recommend a specific course of action. This guide cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this guide may be applicable in all circumstances. This guide is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this guide be applied without consideration of a project's many unique aspects. The word “Standard” in the title of this document means only that the document has been approved through the ASTM consensus process.1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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3.1 Reference materials are vitally important in product and specification testing, in research and development work, in technical service work, and in quality control operations in the rubber industry. They are especially valuable for referee purposes.3.2 Categories, Classes, and Types of Reference Materials (RM): 3.2.1 Reference materials are divided into two categories:3.2.1.1 Industry Reference Materials (IRM)—Materials that have been prepared according to a specified production process to generate a uniform lot; the parameters that define the quality of the lot are evaluated by a specified measurement program.3.2.1.2 Common-Source Reference Materials (CRM)—Materials that have been prepared to be as uniform as possible but do not have established property (parameter) values; the knowledge of a common or single source is sufficient for certain less critical applications.3.2.2 Industry reference materials (IRMs) are divided into additional classes and types according to the method of evaluating the lot parameters and according to the production process for generating the lot material. These are explained more fully (refer to Annex A3 and Annex A4 for more details on the discussion in Section 3).3.2.3 The following lot parameters are important for reference material use:3.2.3.1 Accepted Reference Value (AR Value)—An average IRM property or parameter value established by way of a specified test program.3.2.3.2 Test Lot Limits (TL Limits)—These are limits defined as ±3 times the standard deviation of individual IRM test results across the entire lot for the property or parameter(s) that defines lot quality; the measurements are conducted in the laboratory of the organization producing the IRM.3.2.3.3 Although the limits as defined in 3.2.3.2 are given in terms of ±3 times the standard deviation, the rejection of individual portions of the lot as being outlier or non-typical portions in assessing the homogeneity of the lot is done on the basis of ±2 times the appropriate standard deviation, that is, on the basis of a 95 % confidence interval. See Annex A3 and Annex A4 for more information and the evaluation procedures.3.2.4 All IRMs have an AR value and TL limits; however the AR value may be obtained in one of two ways to produce one of two classes of AR values:3.2.4.1 Global AR Value—This AR value is obtained from an interlaboratory test program where the word “global” indicates an average value across many laboratories.3.2.4.2 Local AR Value—This is an AR value obtained in one laboratory or at one location, usually the laboratory responsible for preparation of the homogeneous lot.3.2.5 An additional parameter is of importance for IRMs that have a global AR value:3.2.5.1 Between-Laboratory Limits (BL)—The group of laboratories that conduct interlaboratory testing to establish an AR-value are not equivalent to a system or population typical of industrial production operations that use the usual ±3 standard deviation limits. Such production operations are systems that have been purged of all assignable causes of variation and are in a state of ‘statistical control’ with only random variations that cannot be removed. Thus, the recommended limits on all IRMs are the ±2 standard deviation limits that pertain to a 95 % confidence level. If for serious reasons that can be totally justified, ±3 standard deviation limits are required, these may be used provided that full and complete documentation is supplied to justify the limits.3.2.6 The homogeneity or uniformity of the lot, which determines the magnitude of the TL limits, may be designated as one of two different levels of uniformity. The key factor that determines the level of uniformity is the capability of blending the IRM portions or parts that constitute the lot, to ensure a high degree of uniformity from the blending process. IRMs that cannot be blended will have an extra residual amount of variation (portion to portion) that lowers the level of uniformity.3.2.6.1 Uniformity Level 1 (UL-1)—This is the most uniform or highest level of homogeneity that can be attained by the use of a specified test for measuring the parameter that defines lot quality; it is obtained by the use of a blended material and is referred to as a Type B (B = blended) IRM.3.2.6.2 Uniformity Level 2 (UL-2)—This is the lesser degree of uniformity that is attained by the use of a specified test for measuring the parameter that defines lot quality; it is normally obtained for non-blended materials and is referred to as a Type NB (not blended) IRM.3.3 IRMs have a number of use applications in the technical areas, as cited in 3.1.3.3.1 Single Laboratory Self Evaluation—The IRM may be used in a given laboratory (or with a given test system) to compare the test results within the laboratory to the accepted reference value for the IRM. An IRM can also be used for internal statistical quality control (SQC) operations.3.3.2 Multi-Laboratory Evaluation—The IRM may be used between two or more laboratories to determine if the test systems in the laboratories are operating within selected control limits.3.3.3 One or more IRMs may be used in the preparation of compounds to be used for evaluating non-reference materials in compound testing and performance.3.3.4 Reference liquid IRMs may be used for immersion testing of various candidate or other reference compounds. Such immersion testing is important due to the deleterious influences of immersion liquids on rubber compounds.3.3.5 IRMs may also be used to eliminate interlaboratory testing variation known as “test bias:” a difference between two (or more) laboratories that is essentially constant between the laboratories for a given test property level, irrespective of the time of the test comparisons. In such applications a differential test measurement value, (IRM − experimental material), becomes a corrected test result; this corrected value is used as the measure of performance rather than the “as-measured” test value on the experimental material of interest.3.4 Average values play an important role in various operations and decisions in this practice. For this practice, “average” is defined as the arithmetic mean.3.5 The various characteristics of IRMs and CRMs (categories, classes, types) are listed in summary form in Table 1.(A) AR value  =  accepted reference value.TL limits  =  test lot limits.Global  =  AR value obtained from an interlaboratory test program.Local  =  AR value obtained from one laboratory.Type-B  =  IRM that has been blended to ensure high uniformity.Type-NB  =  IRM that cannot be blended.UL-1 and UL-2  =  levels of uniformity in the IRM lot; UL-1 is higher uniformity than UL-2.See Annex A3 and Annex A4 for more information.3.6 This practice and the IRM program it describes was developed to replace a standardization program conducted by the National Institute of Standards and Technology (NIST) that began in 1948 and has been phased out.3.7 It is not feasible to write into this practice all the necessary specifications, modes of preparation, sampling, and testing protocols, for the wide variety of materials that will eventually become IRM. Therefore this practice is published to give general guidelines for IRMs.3.8 A permanent IRM Steering Committee within Subcommittee D11.20 shall be constituted by Subcommittee D11.90 to assist in the utilization of this practice and to make technical and, where required, policy decisions regarding the preparation and administration of IRM.1.1 This practice covers materials used on an industry-wide basis as reference materials, which are vitally important to conduct product, specification, and development testing in the rubber industry. This practice describes the steps necessary to ensure that any candidate material, that has a perceived need, can become a Reference Material. The practice sets forth the recommendations on the preparation steps for these materials, on the testing that shall be conducted to permit acceptance of any candidate material, and on how the documentation needed for the acceptance shall be recorded for future use and review.1.2 This practice shall be administered by ASTM Committee D11.1.2.1 Important sections of this practice are as follows:  Section 3Preparation of Industry Reference Materials 4Overview of Industry Reference Material Testing 5Chemical and Physical Specifications for IRM 6Reference Material Documentation 7Typical Reference Material Use 8Recommended Package Size for IRM Annex A1Recommended Sampling Plans for Homogeneity Testingof an IRM Annex A2Test Plan and Analysis for Homogeneity of an IRM Annex A3Test Plan and Analysis to Evaluate an AcceptedReference Value Annex A4Statistical Model(s) for IRM Testing Annex A5Example of Annex Calculations for a Typical IRM Appendix X1Two-Way Analysis of Variance for Calculating Sr Appendix X21.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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4.1 By following the procedures specified in this guide, any item of physical evidence will have a traceable audit trail by which the origin, past history, treatment, and analysis of the item can be determined.4.2 By following these procedures, the chain of custody of any item of physical evidence will be maintained and documented.1.1 This guide describes methods to be used for labeling physical evidence collected during field investigations; received in a forensic laboratory; or isolated, generated, or prepared from items submitted for laboratory examination.1.2 Many types of physical evidence may be hazardous. It is assumed that personnel assigned to the collection, packaging, storing, or analysis of physical evidence will take precautions as appropriate to the evidence.1.3 This guide offers a set of instructions for performing one or more specific operations. This standard cannot replace knowledge, skill, or ability acquired through appropriate education, training, and experience and should be used in conjunction with sound professional judgment.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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1.1 This guide covers the manufacture of Weight Shift aircraft and their qualification for certification.1.2 This guide applies to Weight Shift Control aircraft seeking civil aviation authority approval, in the form of flight certificates, flight permits, or other like documentation.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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