ALS LIMITED — M&A Activity 2009

Dec 14, 2009

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15 December 2009

BY E-LODGEMENT

The Manager Companies Announcements Office ASX Limited

Dear Sir/Madam

Off-market bid by Australian Laboratory Services Pty Ltd ACN 009 936 029 (ALS) to acquire all ordinary shares in PearlStreet Limited ACN 107 329 224 (PearlStreet) (ASX: PST)

ALS, a wholly owned subsidiary of Campbell Brothers Limited ( ASX: CPB ), gives the following information under ASX Listing Rule 3.3 in relation to its takeover bid for all of the shares in PearlStreet:

1. the offer by ALS to acquire all of the ordinary shares in PearlStreet as set out in the Bidder's Statement lodged with ASIC on 10 November 2009 closed yesterday;

2. ALS now has a relevant interest in 98.53% of PearlStreet securities; and

3. on 7 December 2009, ALS commenced the compulsory acquisition process in accordance with Part 6A.1 of the Corporations Act 2001 (Cth) to acquire the remaining PearlStreet securities.

Yours faithfully

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Tim Mullen Company Secretary Australian Laboratory Services Pty. Ltd.