The order the City kept.

NYC-WTC_000058159

Unreadable text fragment containing a file identifier from the March 2002 GCMS batch records.

NYC-WTC_000058160 – NYC-WTC_000058162

Fragmented text containing a unique file identifier from the March 2002 GCMS batch records.

NYC-WTC_000058163 – NYC-WTC_000058170

Laboratory blank analysis report showing all target compounds detected below the method detection limit on March 29, 2002.

NYC-WTC_000058171 – NYC-WTC_000058174

Calibration log listing response factors for nitrosamines and chlorinated solvents on March 29, 2002.

NYC-WTC_000058175 – NYC-WTC_000058182

Analysis of reference standards for nitrosamines and VOCs with measured concentrations near target levels on March 29, 2002.

NYC-WTC_000058183 – NYC-WTC_000058190

GCMS analysis of sample AE04416 for organic compounds with surrogate standard showing 5.0 micrograms detection limit.

NYC-WTC_000058191 – NYC-WTC_000058198

GCMS analysis of sample AE04516 for organic compounds with surrogate standard 2,4-DDD showing 75% recovery.

NYC-WTC_000058199 – NYC-WTC_000058206

GCMS analysis of sample AE04517 for organic compounds with surrogate standard showing 84% recovery on April 4, 2002.

NYC-WTC_000058207 – NYC-WTC_000058214

GCMS analysis of sample AE04518 for organic compounds with surrogate standard showing 70% recovery on April 4, 2002.

NYC-WTC_000058215 – NYC-WTC_000058222

Gas chromatography-mass spectrometry analysis of environmental sample AE04519 conducted April 4, 2002, detecting unknown compounds and surrogates.

NYC-WTC_000058223 – NYC-WTC_000058230

Gas chromatography-mass spectrometry analysis of environmental sample AE04588 conducted April 4, 2002, detecting unknown compounds and surrogates.

NYC-WTC_000058231 – NYC-WTC_000058238

Gas chromatography-mass spectrometry analysis of environmental sample AE04589 conducted April 4, 2002, detecting unknown compounds and surrogates.