A.S. TRUST & HOLDINGS

P.O. BOX 5379						PPP 469 BOX 10000

KANEOHE, HI  96744					SAIPAN MP 96950

TELEPHONE:  (808) 235-1890  FAX:  (808) 235-0116  CELL/VM:  (808)
561-4688

EMAIL:   HYPERLINK "mailto:richard@astrust.com"  richard@astrust.com  or
richard@maruya.net

AMENDMENT FOR THE ASSESSMENT OF END-USE

OCCUPATIONAL AND RESIDENTIAL OCCUPANT EXPOSURES TO

HCR-188C, A SAFE ALTERNATIVE HYDROCARBON

REFRIGERANT FOR WHITE GOODS SYSTEMS

1.0 INTRODUCTION

Alaska Industrial Hygiene Services (AIHS) has prepared this amendment to

Assessment of End-Use Occupational and Residential Occupant Exposures to
HCR-

188C, A Safe Alternative Hydrocarbon Refrigerant for White Goods Systems
(AIHS,

May 2007). This amendment was requested by A.S. Trust & Holdings to
clarify

additional information requested by the United States Environmental
Protection Agency

(EPA) under its Significant New Alternatives Program (SNAP).

This amendment specifically addresses potential exposures related to
window air

conditioning units and upright freezers as part of the previous white
goods assessment

that included household refrigerator units. Calculations contained in
this amendment

are based on charge rates of 124.74 and 121.9 grams of HCR-188C for
typical window

air conditioning units and 40 grams of HCR-188C for an upright freezer.
Charge rates

were provided to AIHS by A.S. Trust & Holding

October 31, 2007  Addendum 

Charge and performance rates on the freezer was the same as the
refrigerator so the calculation was done at 25% of HCR-188C in the
upright freezer with same cubic feet dimension as the refrigerator. 

