NYC-WTC_000231403

NYC 9/11 Public Portal Document SI 9-cramn-narii 'IS ■

f [ings and Conclusions (12) initial background air samples were collected and analyzed at building 400. Twelve (12) ^es were analyzed via phase contrast microscopy (PCM) and two (2) were analyzed via Transmission ■Son Microscopy (TEM). All were below the permksible limits.

K^Based on EPA Guidelines, we collected one hundred fifty-eight (158) bulk samples and analyzed them via R Polarized Light Microscopy (PLM) Methodology. One (I) sample collected from one apartment was found B to be slightly above the regulatory limits of 1%. Zero (0) were found to be above the regulatory limits S' upon further analysis at a second laboratory for quality control purposes. However, certified asbestos f abatement contractors hired independently by the owner, were used to clean the specific apartment and the I areas were cleared by ALC via TEM air sampling, AU air samples were found to be well below the permissible limits and the tenants where this cleaning took place have beep notified of the clearance.

One hundred seventy (170) air samples were collected and analyzed via TEM Methodology, The results indicated that the living areas achieved the acceptance criteria below <70 structures per nun2 set by the above regulations.

6. Limitations and Exclusions All the professional opinions presented in this report are based solely on the scope of work conducted and sources referred to in our report. The data presented by ALC in this report was collected and analyzed using generally accepted industry methods and practices at the time the report was generated. This report represents the conditions, locations, and materials that were observed at the time the fieldwork was conducted. No inferences regarding other conditions, locations, or materials, at a later or earlier time may be made based on the contents of the report No other warranty, express or limited is made. ALC’s liability and that of its contractors and subcontractors, arising from any services rendered hereunder, shall not exceed the total fee paid by the client to ALC for this project. This report was prepared for the sole use of our client. The use of this report by anyone other than our client or ALC is strictly prohibited without the expressed written consent of ALC. Portions of this report may not be used independent of the entire report.

ji

03558 J I CITY_21MC100_008879974

NYC-WTC_000231408