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Technical Support – Standards & Programs R. Lee Lippincott Ph.D. Research Scientist 1 A-280 Research Project Manager PowerPoint Presentation
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Technical Support – Standards & Programs R. Lee Lippincott Ph.D. Research Scientist 1 A-280 Research Project Manager Bureau of Environmental Assessment Chair, NJAWWA Research and Technology Transfer Committee. Analytical Program Support Water Quality Standards.

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Technical Support – Standards & Programs

R. Lee Lippincott Ph.D.

Research Scientist 1

A-280 Research Project Manager

Bureau of Environmental Assessment

Chair, NJAWWA Research and Technology Transfer Committee

analytical program support water quality standards
Analytical Program SupportWater Quality Standards
  • Surface Water Quality Standards
    • N.J.A.C. 7:9B
  • Ground Water Quality Standards
    • N.J.A.C. 7:9-6
  • New Jersey Safe Drinking Water Act (A-280)
    • P.L. 1983, c.443
    • NJMCLs
        • N.J.A.C. 7:10-16
technical support standards development
Technical Support:Standards Development
  • NJDEP: Bureau of Ground Water Pollution Abatement
  • NJDEP: Bureau of Safe Drinking Water
  • NJDEP: Division of Water Quality Planning and Standards
pql objectives
PQL Objectives
  • To Quantify Chemical Contaminants at the Human or Aquatic Criterion Levels
  • To Determine Laboratory Capability
      • Theoretical
      • Current New Jersey Certified
method performance sources theoretical laboratory data
Method Performance SourcesTheoretical Laboratory Data
  • EPA
    • ORD Methods (500 series)
    • EAD Methods (1600 series)
  • SW846 Methods
  • APHA Standard Methods
  • USGS Scheduled Methods
  • Literature Research Methods
internet resources theoretical precision and accuracy data
Internet ResourcesTheoretical Precision and Accuracy Data
  • EPA
    • (100-900 series)
    • (1600 series)
  • USGS Scheduled Methods
  • ASTM Methods
  • http://infotrek.er.usgs.gov/servlet/page?_pageid=202,204,1160&_dad=portal30&_schema=PORTAL30
internet resources theoretical precision and accuracy data8
Internet ResourcesTheoretical Precision and Accuracy Data
  • SW846 Methods
  • http://www.epa.gov/epaoswer/hazwaste/test/3_series.htm
method performance sources theoretical laboratory data9
Method Performance SourcesTheoretical Laboratory Data
  • APHA Standard Methods
    • CDROM Methods
  • Literature Research Methods
    • Dialogue Search by NJDEP Information Resource Center (IRC)
method performance sources theoretical laboratory data10
Method Performance SourcesTheoretical Laboratory Data
  • Determine a consistent Method Detection Limit (MDL) using published methods
  • Apply a multiplier to determine theoretical PQL
    • Multiplier range (3 to 5 times MDL)
pql overall design current new jersey certified laboratory data
PQL Overall DesignCurrent New Jersey Certified Laboratory Data
  • New Jersey is a NELAP Recognized Accrediting Authority
  • NJ Certified Laboratories will submit method performance data as part of an annual demonstration
  • Office of Quality Assurance will maintain a database of this information
method performance sources current new jersey certified laboratory data
Method Performance SourcesCurrent New Jersey Certified Laboratory Data
  • NJDHSS Laboratory
    • State Primacy Lab
  • Site Remediation “Equis” Database
  • BSDW Compliance Database
  • Private Well Testing Act Database
detection limit issues
Detection Limit Issues
  • Many regulatory standards near detection limit
  • Lab credibility often associated with detection limits
  • Maze of tests and matrices make it difficult to find a universally applicable technique
  • Calculating detection limits can be expensive
two main approaches to calculating detection limit
Two Main Approaches to Calculating Detection Limit
  • Single Point
    • based on variability of analyte response at a single concentration
  • Multiple Point
    • Calibration Design
single point approach to calculating detection limit
Single Point Approach to Calculating Detection Limit
  • Method
    • 40CFR Part 136 Appendix B
  • Seven (7) replicates at ~ [5 times] the background noise
  • Multiply by (z) distribution factor
    • 3.14 time the S.D. = MDL
multiple point approach to calculating detection limit
Multiple Point Approach to Calculating Detection Limit
  • Calculate the detection limit from variability in analyte response from a series of standards spiked over a range of concentrations
multiple point approach linear least squares regression
Multiple Point ApproachLinear Least Squares Regression

YD

Instrument Response

YC

0

LC

LD

Concentration

summary
Summary
  • Outlined program structure
  • Defined Inputs and Outputs for Technical Support
  • Presented the methodology for determining parameter specific Standards
how results can be used
How Results Can Be Used ?
  • By DEP
    • To understand evolving improvements in Analytical Methods
    • To monitor sensitivity improvements to eventually quantify chemicals at the criteria level
    • To have a central source of information that defines the Data Quality Objectives for programs