TechClean scope of work for HVAC cleaning, Nov 2001

NYC 9/11 Public Portal Document

, IX/NOV.,22 4 1:54R1 83121231912^ ’. TECS CUBAN N0.499 P.6Z7 21012 1

Inbook Aik Quiurr & Mechknicii Hysiene . $ Mt. Peter Hoyle Novembe 27.2001 Page 5 of 5 SCOPE OE WORK A1 grilles and diffusers, either iuteraal to spartments or in common areas, will be treated as fo lows:

a. The grille wll be remoMtd and bagged. b. Each grille will be wat4 and detergent washed. c. Each grille will be sanitized with an anti-microbial agent. d, The grille vnll be re-instaljed. e. Access to each apartment will be required three (3) times on the day of the cleaning. 1. Tbe grille! will be rotnoved and ihe ductwork will be sealed. 2. The horizontal ductwork will be cleaned. 3. Th« grilks will be re-installed and housekeeping will be done.

2. Ti e kitchen and exhaust ductwork uiII be addressed as follows;

a. The horizontal ductwork will be cleared using a pneumatic-powered whip. b. The horizontal di ctwork will be HEPA vacuumed. c. The verrica riser-» will b® cleaned with a pneumatic whip or rotating brush depending on the internal size. ■ d. Any debris will be frapped in a HSPA-filtered collecdon device. 8, The exhaust' &n$ will be disassembled, JiSPA-vacuumed and re-assembled. f. All internal surfaces, frop: terminal ends of horizontal to the rooftop fan, will ^treated withaoi^^c^iaHg^^anaidessl™d^picgmethod. 3. air-handling sy stems lid associated duc&vork will be Massed as follows:

a. The HVAC syate® will be sequeutisLy «ldres5ed in the direction of die surftow. b. The return ductwork grill^ will be el<«ned as discussed in Section 1. c. The horizontal diotwork will be cleaned using a pneumatic whip. <L Any debris will ba collected in a HEP A.* filter^ coilectloQ unit e. If internal cross section of the ductwork is larger than 24 inches by 24 inches, a technician will ei ter it will contact-clean with a HEPA vacuum. f. The outside air intake louvers w.l| be pressure-washed or HEPA-vacuumed. as applicable. 1 8< AU faitemai surfaces of die alr-hardling unit will be HEPA vacuumed to 99.$7H efficiency at J microns. . h. The coils will be high-preisure water-washed or HEPA vacuumed, as applicable. i. The supply ductw ork will ba cleaned losing the same protocols described above. j. All internal surftices of the air delivery' system will be treated whh an anti-microbial agent via an. aiders sprayer or hand-wiping method.

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