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Participating Laboratories. Accutest Laboratories - Dayton, NJ and Orlando, FL Del Mar Analytical Laboratories - Phoenix, AZ and Irvine, CA Pace Analytical Services - Indianapolis, IN; Lenexa, KS; New Orleans, LA; and Minneapolis, MN

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participating laboratories
Participating Laboratories
  • Accutest Laboratories
  • - Dayton, NJ and Orlando, FL
  • Del Mar Analytical Laboratories
  • - Phoenix, AZ and Irvine, CA
  • Pace Analytical Services
  • - Indianapolis, IN; Lenexa, KS; New Orleans, LA;
  • and Minneapolis, MN
  • North Creek Analytical Laboratories - Portland, OR
  • Sequoia Analytical Laboratories
  • - Morgan Hill, CA and Petaluma, CA
  • Severn Trent Laboratories
  • - Los Angeles, CA and San Francisco, CA

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performance evaluation pe study parameters
Performance Evaluation (PE) Study Parameters
  • Each laboratory facility assigned a letter designation (A through M)
  • One aqueous double-blind PE sample
  • PE samples analyzed for three fractions:
    • Volatile organic compounds (VOC, SW-846 Method 8260B)
    • Semivolatile organic compounds (SVOC, SW-846 Method 8270C)
    • ICP metals (SW-846 Method 6010B)
  • Contractors instructed to request Target Compound List (TCL) VOC with typical oxygenate compounds, TCL SVOC, and Target Analyte List (TAL) ICP metals.

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slide4

Reporting/Deliverable Issues

  • Variability in reporting limits.
  • Variability in reported analyte lists.
  • Three laboratories were contacted to address “not-detected” results for analytes in the PE sample.
  • One laboratory subcontracted the SVOC analyses

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slide5

Reporting/Deliverable Issues (Continued)

  • Two laboratories reported positive results for a non-spiked SVOC.
  • One laboratory did not initially perform the VOC analysis due to a log-in error.
  • One laboratory performed the VOC analysis using a vial with headspace
  • One laboratory analyzed the VOC fraction outside of the holding time

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slide6

PE Sample Scoring

  • PE sample included the following:
    • 15 VOCs
    • 7 SVOCs
    • 6 Metals
  • Laboratory results scored against PE sample true values.

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slide7

PE Sample Scoring(Continued)

  • Each percent from 100% equals 1 point.
    • Thus, 90% and 110% both equal 10 points.
  • PE results ranked on four aspects:
    • Total VOC score
    • Total SVOC score
    • Total Metals score
    • Average score per analyte reported

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slide8

Aqueous PE Score Summary

  • VOC analysis (1500 points maximum):
  • #1 facility scored 112.41 points
  • #13 facility scored 903.33 points
  • SVOC analysis (700 points maximum):
  • #1 facility scored 46.53 points
  • #13 facility scored 201.57 points

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aqueous pe score summary continued
Aqueous PE Score Summary (Continued)
  • Metals analysis (600 points maximum):
  • #1 facility scored 17.93 points
  • #13 facility scored 59.16 points
  • Average Score/Analyte (100 points maximum):
  • #1 facility scored 7.79 points
  • #13 facility scored 39.51 points

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