Letter re: air sampling and cleaning at 70 Battery Place,

NYC 9/11 Public Portal Document

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Indoor environmental quality survayr, 31 WP.Fr 19,,, STRN.E-r ,1a, Pt.00R water treatment consulting 14t1W YORX, NI;'W YORK toorA Asbestos & lead Held services TL: (L13f 463-7811 Regulatory compliance programs PAx: (111) 463-9397 Air, water 4 salt analytical laboratories WEB: WWWAManiNTGROUP.COM

October 3,

Mr. Brian cCann Cushman & Wakefield a/a/f J.P. Morgan (Chase Manhattan Bank One Chase Manhattan Plaza New York, New York 10081

Re: 15 Broad Street Ambient Project #211352

Dear Mr. MgCann:

The following is a summary of the indoor environmental quality survey that Ambient Group, Inc. performed on September 16th, 2001 at the above referenced location. The survey included sampling for potable water, airborne and settled dust characterization, as well as asbestos absence/presence in settled dust.

Three (3) setitled dust characterization samples were collected from various locations on floors 24, 12 and 2. The samples were composed primarily of cellulose, carbon particles, fiber glass and gravel road dust. No asbestos was detected in any of the samples collected. Many of these elements identified in the samples are commonly found in an indoor environment and should not pose any adverse health concerns to the building occupants.

Five (5) air samples were collected from various locations on the 24s', 12d`, 2nd, 1"' and ground floors and analyzed for dust characterization. The samples were composed primarily of carbon particles, skin flakes, gravel road dust, and fungal spores. Many of these elements identified are commonly found in the indoor air and should not pose any adverse health concerns. A trace amount of asbestos was detected in the sample collected in the property management offices, the level found i! well below any regulatory limits or guidelines.

It should be doted that skin fragments, which were also identified in the samples, consist primarily of dead epithelial cells which are constantly shed by humans and are present as a result of the building occupants. Likewise, decayed organic matter typically includes decaying plant material and food particles, and it is not uncommon to find these materials in samples collected from within commercial office buildings.

In addition to the settled dust samples, testing for carbon dioxide, carbon monoxide, volatile organic compounds and airborne particulates was also performed. Airborne levels for each of these param ters were within published guidelines/regulations.

Analysis of he two (2) water samples, collected from the locations noted below, indicated that all measured parameters were within acceptable levels as defined by the Safe Drinking Water Act.

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