NYC-WTC_000232127

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

4/yr (manual) External Leak Check 4/yr < 80 mL/min not described Internal Leak Check 4/yr < 80 mL/min not described Temperature Audit 4/yr -I- 2C not described not described Pressure Audit 4/yr (?) ±10 mm not described Balance Audit 1/yr Manufacturers specs not described

Precision Collocated samples every 6 days for 25% of sites CV < 10%' Part 58, App.A, Sec Single analyzer 1/3 mo. CV < 10% 3.5/5.5 Single Analyzer 1/yr CV < 10% not described Reporting Qrg. 1/ 3 mo. CV < 10% not described not described

Calibration & Check Standards Flow Rate Transfer Std. 1/yr +2% of NIST-traceable Std. Part 50, App.L Sec 9.1 and 9.2 Field Thermometer 1/yr + 0.1 C resolution not described + 0.5 C accuracy not described Field Barometer 1/yr + 1 mm Hg resolution not described + 5 mm Hg accuracy not described Working Mass Stds. 3-6 mo. 0.025 mg not described Primary Mass Stds. 1/yr 0.025 mg not described

36

CITY_DEP_WORBY_CANNATA_SUBP_000087281

NYC-WTC_000232162