NYC-WTC_000220189

NYC 9/11 Public Portal Document t

228 East 45th Street 10th Floor WKP New York NY 10017 Tel (212) 922 0689 LABORATORIES INC Fax (212) 922 0630

AIR SAMPLE ANALYSIS REPORT PHASE CONTRAST MICROSCOPY

CLIENT WARREN & PANZER ENGINEERS P C TURNAROUND TIME ASAP WFP FILE # 501 01 SAMPLE DATE

WKP LOG I D * N980582 RECEIVED DATE 5/30/98

ANALYSIS DATE 5/30/98 REPORT DATE 6/1/98 CLIENT JOB NYCDDC

CLIENT JOB # 821 69 01

LOCATION BASEMENT/BOILER ROOM ANALYSIS AIRBORNE FIBER COUNTING PHASE CONTRAST MICROSCOPY NIOSH 7400 NIOSH PAT Lab NO 07186 NY STATE ELAP Lab NO 11092 COLLECTION DEVICE 25 mm MCE Filter Cassette Collection Area = 385 sq mm Field Area = 0 00785 sq mm

S/\MPLE WERE COLLECTED BY JOE ENANG

SUMMARY OF ANALYSIS

CLIENT SAMPLE VOLUME FIBERS/ FIBERS/ SAMPLE# LOCATION (LITERS) sq mm cc 019 BASEMENT INSIDE TENT 1800 3185 <0 003 020 BASEMENT INSIDE TENT 1800 1 911 <0 003 021 BOILER ROOM MIDDLE 1800 2 548 <0 003 022 1ST FLOOR BY COPIER MACHINE 1800 0 637 <0 003 023 1ST FLOOR 10 OF SOUTH WALL 1800 0 637 <0 003 024 1ST FLOOR 13 OF NORTH WALL 1800 0 000 025 FIELD BLANK 0 000

NOTES IOfibers/100 fields was used to calculate the lower limit of quantification (LOQ) Results below the LOQ have no statistical validity Samples were not collected by WKP Laboratones Inc The Federal EPA Clearance Cntena following an asbestos abatement project is 0 010 fibers/cc PCM air samples will be disposed of after 3 months unless othenwise directed by client in wnting

LABORATORY ANALYST LABORATORY DIRECTOR

CITY_21MC100_0 02833180

NYC-WTC_000220189