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This agreement dated for reference the 7th day of December 1996


                                      AGREEMENT


Between:           SERVICE SYSTEMS INTERNATIONAL INC.
                   Suite 203, 12840 - 16th Avenue
                   White Rock, B.C., V4A 1N6

                                                 (hereinafter "Buyer")

and:               John R. Gaetz
                   404 - 1240 Quayside Drive
                   New Westminster, B.C., V3M 6H1

                                                 (hereinafter "Seller")


Whereas the Seller is the beneficial owner of 2,643,039 common shares, 
representing 20.62% of the outstanding common shares of UV Systems Technology 
Inc., a private British Columbia registered Corporation having it's 
registered offices at 1100 - 1055 West Hastings Street, Vancouver B.C. V6E 
2E9,

and;

Whereas the Buyer wisher to purchase and Seller wishes to sell the 
aforementioned shares of UV Systems Technology Inc.;

now therefore, Seller and Buyer covenant and agree;

a)     Seller will issue to Buyer, full and clear title in 2,645,039 shares 
       of common stock in UV Systems Technology Inc., in exchange for 600,000 
       shares of Buyer common voting stock.

b)     All common shares in the capital of Buyer issued in paragraph (a), 
       will include a warrant certificate which will entitle the holder to 
       purchase one common shares in the capital of Buyer for each common 
       share in the capital of Buyer issued in paragraph (a) at a purchase 
       price of two Canadian Dollars (C$2.00) per common share, at any time 
       within four years from the date of issuance of the common shares.

c)     Buyer will qualify on issuance 100,000 common shares in the capital of 
       Buyer issued in paragraph (a) as free trading in the United States and 
       use its best efforts to qualify as free trading in the United States 
       the remaining common shares in the capital of BuyerI issued in 
       paragraph (a) so that all common shares issued as contemplated by this 
       Agreement are fully free trading within 24 months of issuance or as 
       otherwise agreed between Buyer and Seller.

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d)     Seller covenants and agrees to assign to Buyer all rights and 
       ownership as and if they exist in the Incentive Stock Option Agreement 
       between Seller and UV Systems Technology Inc., dated August 17, 1995 
       and attached as Schedule "A", for the sum of One Canadian Dollars 
       (C$1.00), receipt of which is hereby acknowledged.

e)     Seller covenants and agrees to assign to Buyer all rights and 
       ownership as and if they exist in 2,520,000 shares of common voting 
       stock in UV Waterguard Systems Inc., for the sum of One Canadian 
       Dollars (C$1.00), receipt of which is hereby acknowledged.

f)     Delivery of shares to and from Buyer and Seller and Option Agreement 
       to Seller shall occur within thirty (30) days of date of signing of this
       Agreement.

       Witness, Name and Address           Service Systems International Ltd.

       /s/ O. Swinton                      /s/ Ken Fielding
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                                           Ken Fielding
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       /s/ Ken Fielding                    /s/ Charles P Nield
       ----------------------              --------------------------------
                                           Charles P Nield

       Witness, Name and Address

       /s/ O. Swinton                      /s/ John R Gaetz
       ----------------------              --------------------------------
                                           John R Gaetz
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