ASTM D6312 Standard Guide for Developing Appropriate Statistical Approaches for Groundwater Detection Monitoring Programs at Waste Disposal Facilities
Данный раздел/документ содержится в продуктах:
- Техэксперт: Машиностроительный комплекс
- Картотека зарубежных и международных стандартов
- ASTM D7204 Standard Practice for Sampling Waste Streams on Conveyors
- ASTM D6250 Standard Practice for Derivation of Decision Point and Confidence Limit for Statistical Testing of Mean Concentration in Waste Management Decisions
- ASTM D5680 Standard Practice for Sampling Unconsolidated Solids in Drums or Similar Containers
- ASTM D6051 Standard Guide for Composite Sampling and Field Subsampling for Environmental Waste Management Activities
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- ASTM D5680 Standard Practice for Sampling Unconsolidated Solids in Drums or Similar Containers
- ASTM D6051 Standard Guide for Composite Sampling and Field Subsampling for Environmental Waste Management Activities
- ASTM D6051 Standard Guide for Composite Sampling and Field Subsampling for Environmental Waste Management Activities
- ASTM D6232 Standard Guide for Selection of Sampling Equipment for Waste and Contaminated Media Data Collection Activities
- ASTM D7204 Standard Practice for Sampling Waste Streams on Conveyors
- ASTM D6250 Standard Practice for Derivation of Decision Point and Confidence Limit for Statistical Testing of Mean Concentration in Waste Management Decisions
- ASTM D7048 Standard Guide for Applying Statistical Methods for Assessment and Corrective Action Environmental Monitoring Programs
- ASTM D7204 Standard Practice for Sampling Waste Streams on Conveyors
- Картотека зарубежных и международных стандартов
ASTM International
Standard Guide for Developing Appropriate Statistical Approaches for Groundwater Detection Monitoring Programs at Waste Disposal Facilities
N D6312
Annotation
This guide covers the context of groundwater monitoring at waste disposal facilities. Regulations have required statistical methods as the basis for investigating potential environmental impact due to waste disposal facility operation. Owner/operators must typically perform a statistical analysis on a quarterly or semiannual basis. A statistical test is performed on each of many constituents (for example, 10 to 50 or more) for each of many wells (5 to 100 or more). The result is potentially hundreds, and in some cases, a thousand or more statistical comparisons performed on each monitoring event. Even if the false positive rate for a single test is small (for example, 1 %), the possibility of failing at least one test on any monitoring event is virtually guaranteed. This assumes you have performed the statistics correctly in the first place.
This guide is intended to assist regulators and industry in developing statistically powerful groundwater monitoring programs for waste disposal facilities. The purpose of this guide is to detect a potential groundwater impact from the facility at the earliest possible time while simultaneously minimizing the probability of falsely concluding that the facility has impacted groundwater when it has not.
When applied inappropriately, existing regulation and guidance on statistical approaches to groundwater monitoring often suffer from a lack of statistical clarity and often implement methods that will either fail to detect contamination when it is present (a false negative result) or conclude that the facility has impacted groundwater when it has not (a false positive). Historical approaches to this problem have often sacrificed one type of error to maintain control over the other. For example, some regulatory approaches err on the side of conservatism, keeping false negative rates near zero while false positive rates approach 100 %.
