NYC-WTC_000209310

NYC 9/11 Public Portal Document

04/25/02 Liberty Mutual WTC IH Operations

and full face respirators with die Tri Combination filters. PPE requirements may need to be modified after the viable ftingi and bacteria sample results are available.

The sample collected on the stairway landing at rite loading dock level contained 80,053 spores/cu.m., consisting largely of Basidiospores with lesser concentrations of Aspetgillus/PeneciUium-like spores and Arthrinium. The elevated concentration at this location is reflective of upwelling air currents into the landing from the B4 level and is not reflective of growth within die staircase. All openings into B4 should be sealed in such a way that air is not communicated into the travel ways. There is evidence of some surface mold growth in the staircase. This may be remedied by a through cleaning with a biocide or a 10% chlorine solution. Workers performing this activity should done full body skin protection and ftiU face respirator. This level of protection is recommended to protect from chemical overspray or splatter and NOT because of the presence of surface mold. 1'urtlier, workers simply passing throug)i the stair way upward from B2 or downv/ard to B2 should don 'A mask respirators with PlOO filters until the openings from below are “airtight”.

Vic Hillman closed the double doors from the rest of die floor into die "pit room" and taped a CSE sign to die door. Ihe sign was down and doors were open during the 4/23/02 entry. In addition, temporary lifting had been strung in a portion of B4 between Mr. Hillman’s entry and mine. Lasdy, there was a vending machine in the kitchenette area that was observed to have been compromised during my entry. I was informed that the machine was intact during the previous entry.

AU stairweUs leading into WTC 5 B4 or the pit room need to be sealed and labeled as PRCS’s. Also note that as you enter the loading dock from the J ramp the fust room on the right (West) side has a small section of drywall. It is heavily mold contaminated and should not be disturbed until it can be remediated. The sprayed on fireproofing in the dock area may soon become affected as weU.

The B4 level of Wl’C 5, pit room and the room mentioned above will require remediation under HI oversight. Careful selection of a remediation contractor is advised. The contractor’s microbial (including fecal coliform) remediation work history experience, hazard communication program, medical surveillance program, respiratory protection program, PPE programs, etc. Liberty Mutual industrial hygiene staff is available review these elements. It is higlily recommended that this service be utilized.

The following definitions were extracted from Aerotech Laboratories (www.acrotcchlabs.coni)

Amerospores Small round spores that are indistinguishable at 600X by liglit microscopy and include TricMerma and unchained AspergiJ/us and Penia//ium. AspergiUus/Penicilliuni These genera are indistinguishable by light microscopy at 600X. Both are ubiquitous, common Type I & III allergens and opportunistic pathogens. These fungi occupy a wide variety of environments and conditions. Aspergillosis is the second most common fungal infection requiring hospitalization in the U.S. H. ni^er is the most common species within the genus and i.s associated with “fungus ball”, a condition wherein fungus actively grows in the human lung, forming a ball, without invading the lung tissue. Asper^i/iu^umigaius, A.flavus, A. niper, A. ustus, andA. I’emeolor are some of the known toxin producers, there are many others in the Penid/Pufft genus. Some Penici7df<m species produce mold VOC’s that the human nose can detect. P. mame^ei is capable of infecting the lymph system, lungs, liver, spleen, and bones. Basidiospores A general category of spores that have are released from the basidium of a fungi. Ubiquitous, Type I & III allergen, saprophyte, plant pathogen. Spores disseminate at high humidity. A rare opportunistic pathogen, toxin producing (mushrooms). Agent of dry/wood rot. CJadosporium Ubiquitous (the most frequent spore found in outdoor air in temperate climates), Hype I & Ill allergen, an opportunistic pathogen, C. carrionii causes a chronic subcutaneous infection (distinguishable by its ability to grow at 35-37® C). Rarely toxigenic, sporulates easily with airborne levels elevated during seasons of high humidity

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