U S Laboratories Inc Watch

from SC 13D/A 1 page Schedule II Information With Respect to Transactions Effected During the Past Sixty Days or Since the Most Recent Filing on Schedule 13d (1) Shares Purchased Average Date Sold(-) Price(2) Common Stock-US Laboratories Gabelli Securities, Inc. 9/19/02 23,300- 14.5000 Gabelli Associates Ltd 9/19/02 192,779- 14.5000 9/04/02 100 14.4400 8/30/02 2,000 14.4500 Gabelli Fund, Ldc 9/19/02 1,600- 14.5000 Gaf II 9/19/02 1,600- 14.5000 Gabelli Associates Fund 9/20/02 100 14.4600 9/19/02 174,943- 14.5000 9/17/02 100 14.4500 9/13/02 1,005 14.4500 9/04/02 2,755 14.4400 8/30/02 2,300 14.4500 Gamco Investors, Inc. 9/19/02 47,400- 14.5000 9/19/02 160,000- 14.5000 9/18/02 20,000 14.4500 9/13/02 1,005 14.4500 9/03/02 3,300 14.4400 8/30/02 1,500 14.4500 Gabelli Advisers, Inc. 9/19/02 20,000- 14.5000 Gabelli Funds, LLC. Gabelli Abc Fund 9/19/02 50,000- 14.5000 (1) the Dispositions on 9/19/02 Were Made in Connection With the Cash Tender Offer Described in Item 5(a) of This Amendment to Schedule 13d. All Other Transactions Were Effected on the NASDAQ National Market. (2) Price Excludes Commission

from 4 1 page Attachment to Form 4 Issuer & Ticker Symbol: U. S. Laboratories/Uslb Statement For: September 19, 2002 Designated Filer: Gabelli Asset Management Inc. List of Joint Filers: Gabelli Group Capital Partners, Inc. One Corporate Center Rye, New York 10580 Mario J. Gabelli One Corporate Center Rye, New York 10580 Page 3 of 3

from 3 1 page Attachment to Form 3 Issuer & Ticker Symbol: U. S. Laboratories Inc./Uslb Designated Filer: Gabelli Asset Management Inc. List of Joint Filers: Gabelli Group Capital Partners, Inc. One Corporate Center Rye, New York 10580 Mario J. Gabelli One Corporate Center Rye, New York 10580 Date of Event Requiring Statement: September 17, 2002 Page 3 of 3

from SC 13D/A 1 page Schedule II Information With Respect to Transactions Effected During the Past Sixty Days or Since the Most Recent Filing on Schedule 13d (1) Shares Purchased Average Date Sold(-) Price(2) Common Stock-US Laboratories Gabelli Securities, Inc. 8/29/02 2,000 14.4463 Gabelli Associates Ltd 8/29/02 3,000 14.4463 8/29/02 1,500 14.4400 8/28/02 6,000 14.4498 8/28/02 3,000 14.4400 Gabelli Associates Fund 8/29/02 3,050 14.4463 8/28/02 7,300 14.4498 8/28/02 2,900 14.4400 Gamco Investors, Inc. 8/29/02 20,000 14.4600 8/28/02 2,000 14.4498 (1) Unless Otherwise Indicated, All Transactions Were Effected on the NASDAQ National Market. (2) Price Excludes Commission

from SC 13D/A 1 page Schedule II Information With Respect to Transactions Effected During the Past Sixty Days or Since the Most Recent Filing on Schedule 13d (1) Shares Purchased Average Date Sold(-) Price(2) Common Stock-US Laboratories Gabelli Securities 8/27/02 2,000 14.4443 8/26/02 1,500 14.4352 Gabelli Associates Ltd 8/27/02 4,400 14.4400 8/27/02 8,000 14.4443 8/26/02 5,600 14.4352 Gabelli Associates Fund 8/27/02 10,450 14.4443 8/26/02 6,375 14.4352 Gamco Investors, Inc. 8/27/02 5,600 14.4443 8/27/02 7,900 14.4500 8/26/02 400 14.4300 8/26/02 3,000 14.4352 8/21/02 7,600 14.4100 8/21/02 8,000- 14.4100 (1) Unless Otherwise Indicated, All Transactions Were Effected on the NASDAQ National Market. (2) Price Excludes Commission

from SB-2/A ~10 pages Underwriting agreement

from SB-2/A ~5 pages Underwriting agreement

from SB-2/A ~50 pages Underwriting agreement