Attachment 8 NAVSEA Letter 9514 (Dry Ice Vent Cleaning Ducts).pdf

DEPARTMENT OF THE NAVY

NAVAL SURFACE WARFARE CENTER

CARDEROCK DIVISION

NAVAL SHIP SYSTEMS

ENGINEERING STATION

5001 S. BROAD STREET

PHILADELPHIA, PA 19112-1403

IN REPLY REFER TO

Ser 9210/021

20 MAY 2009

From: Commander, Carderock Division, Naval Surface Warfare Center, Philadelphia, PA 19112-1403

To: Distribution

Subj: DRY ICE CLEANING OF VENTILATION DUCTS

1. Currently there are a number of companies providing the U.S. Navy with dry ice cleaning of ventilation systems. The technical warrant holder NAVSEA Code 05Z and the Life Cycle Manager, Carderock Division, Naval Surface Warfare Center (NSWCCD-SSES) Code 921 have developed guidelines that must be met prior to a company cleaning any systems onboard a U.S.

Navy vessel.

2. The following guidelines must be met during cleaning of ventilation systems on U.S. Navy ships and submarines:

a. All surface ships and submarines shall have baseline CO2 and O2 readings taken prior to starting any dry ice cleaning procedure.

(1) Surface ships shall have readings taken in all spaces that the ventilation system, which is being cleaned, serves or passes through.

(2) Readings shall also be taken in all compartments open to, or can be open to, adjacent to or below the spaces stated in 2.a.1.

(3) Submarines shall have monitoring completed on every accessible compartment on the vessel.

3. All CO2 and O2 readings shall be taken before and after vent cleaning each day.

4. CO2 and O2 readings shall be monitored and recorded hourly during cleaning operation on surface ships and continuously on submarines. Monitoring should take place in all compartments that are listed in paragraph 2.a. Cleaning shall cease anytime CO2 readings exceed 3000 ppm or O2 level drops below 19.6%. When the cleaning process has been stopped, identify the deficiency and correct. Once corrected and CO2 readings are below 2000 ppm and O2 readings are above 19.6% then cleaning may be resumed.

5. In addition to monitoring CO2 and O2 all standard shipboard safety procedures shall be followed.

6. All companies providing dry ice cleaning shall have an approved vent cleaning procedure prior to start of any cleaning. NAVSEA Code 05Z42 and NSWCCD-SSES Code 921 must approve all procedures.

Subj: DRY ICE CLEANING OF VENTILATION DUCTS

7. NSWCCD-SSES point of contact for the above is John Miller, Code 921, Commercial (215) 897-1211, DSN 443-1211 or e-mail: john.p.miller2@navy.mil.

EDWARD J. MCCUNNEY

By direction

Distribution:

COMNAVSURFLANT Norfolk, VA (N434) COMNAVSURFPAC San Diego, CA (N342) COMNAVAIRPAC San Diego, CA (N431) COMNAVAIRLANT Norfolk, VA (N431) COMSUBFORCE Norfolk, VA (N432A)

Copy to:

COMNAVSEASYSCOM (Codes O5Z, 04XE) mailto:john.p.miller2@navy.mil