NYC 9/11 Public Portal Document
Part II - Environmental Community Monitoring Plan
133-135 Greenwich & 21-23 Thames Streets
Airtek Project 05-0701— Rev 2 September 16, 2005
Precision #5 Fg/m for cone. 80 µg/m3 40 CFR, Pt 50, Both PM10 values must be
Single analyzer 1/6 days App M, S 4.1 > 20 µg/m .
7% for cone. >80 µg/m
Reporting 1/ 3 months 95% CI <± 15% 40 CFR, Pt 58,
organization App A, S 5.3
EPA-600/4-83-023
Accuracy Transfer standards different
Single analyzer Quarterly None 40 CFR, Pt 58, then those used in
Annual accuracy (all sites yearly) 95% CI #± 20% App A calibration. Recalibrate
EPA-600/4-83-023 quarterly (all sites before
Vol II, App 15, S 6 any additional sampling.
Invalidate data to last
acceptable flow yearly)
check if difference> 10%.
QC Checks
Field calibration flow 1/month Percentage difference # ±7 40 CFR, Pt 50,
check from sampler's indicated App M, S 8.2 Trouble shoot and
flow rate or # ± 10 % from Vol II. MS 2.10.3 recalibrate sampler.
"Standard" filter at beginning of design condition flow rate
weighing weighing day
f 20g of original weight Vol II, S 2.10.4 Trouble shoot and reweigh.
Reweighing filters 5 exposed and 5
unexposed/day f 20 g of original weight Trouble shoot and reweigh.
I/month
± 2 g at 10 mg Vol II, S 2.10.4 Trouble shoot and reweigh.
Balance zero and every fifth filter f 4 g at zero
Calibration check ± 2 gat 10 mg Vol II, S 2.10.4
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NYC-WTC 000134267
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