Forwarding WTC air monitoring scope for final review, Aug 2002

NYC 9/11 Public Portal Document

Pt. 763, Subpt. E, App. A 40 CFR Ch. I <7-1-00 Edition)

TABLE III—SUMMARY OP LABORATORY DATA QUALITY OBJECTIVES

Conformance Unit Operation Esneciation

Sample receiving Review of receiving repeat Each sample 95% complete Sample custody Review of chain-of-custody record Each sample 95% complete Sample preparauon Supplies and reagents On receipt Meet qjecs. or reject Grid opening size 20 opcntngs/20 grids/lot 100% of 1000 or 1 opening/Sample Special clean area moratoring After cleaning or service Meet specs or reclean Labotaiory blank 1 per prep series or 10% Meet specs, or reanalyze series Plasma etch blank I per 20 samples 75% Multiple preps (3 per sample) Each sample One with cover of IS complete grid sqs. Sample analysis System Check Eaihday Each day Alignment check Each day Each day Magnification calibration with low and high Each month or after service 95% standards ED calibration by gold standard WeeUy 95% EDS calibration by copper line DaUy 95% Performance check L^xraioty blank (measure of cleanliness) Prep 1 per series or 10% Meet specs or leadlperlSsamides reanalyze series Replicate counting (measure of precision) 1 per 100 samples 1.5 X Poisson Std. Dev. Duplicate analysis (measure of reproducibility) 1 per 100 samples 2 X Poisson Std. Dev. Known samples of typical materials Training and for com­ 100% (walking standards) parison with unknowns Analysis of NBS SRM 1876 and/or RM 8410 1 per analyst per year 1J5 X Poisson Std. Dev. (measure of accuracy and comparability) Data entiy review (data validation and measure Each sample 95% of completeness) Record mid verily ID electron diffiaction pattern I per 5 samples 80% accuracy of structure Calculaiionsand Hand calculation of automated data reduction 1 per 100 samples 85% TTdUCtion procedure or independent recalculation of hand- calculatcd data

1. When the samples arrive at the labora­ 5. Provide laboratory blanks with each tory, check the samples and documentation sample batch. Maintain a cumulative aver­ for completeness and requirements before age of these results. If this average is greater initiating the analysis. than 53 f/mm^ per 10 200-mesh grid openings, 2. Check all laboratory reagents and sup­ check the system for possible sources of con­ plies for acceptable asbestos background lev­ tamination. els. 6. Check for recovery of asbestos from cel­ 3. Conduct all sample preparation in a lulose ester filters submitted to plasma clean room environment monitored by lab­ asher. oratory blanks and special testing after 7. Check for asbestos carryover in the plas­ cleaning or servicing the room. ma asher by including a blank alongside the 4. Prepare multiple grids of each sample. positive control sample.

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NYC-WTC_000139317