EXHIBIT 52 SAFETY-KLEEN IS CONVINCED LLE CANNOT ACHIEVE ITS PROJECTED SYNERGIES- The following slides contain statements of the opinion and beliefs of SK concerning various matters relating to the ability to achieve synergies in a combination of SK and LLE as follows: . Off-site Hazardous Waste Management Business is Declining . Safety-Kleen and LLE - Not Synergistic Businesses . LLE/ Rollins "Synergies" are Not Replicable in an SK/LLE Combination . LLE's Waste Internalization Program is not Feasible . SK Believes: LLE Service Center Proposals Would Reduce Gross Profit . Further People Cuts Would Lose Business OFF-SITE HAZARDOUS WASTE MANAGEMENT BUSINESS IS DECLINING HAZARDOUS WASTE MANAGED OFFSITE: TRENDS [Line graph depicting volumes of hazardous waste managed offsite using the 1989 volume as the basis (100%) 1989 100% 1993 142% 1990 120% 1994 135% 1991 140% 1995 130% 1992 150% 1996 123% Source-Farkas-Berkowitz] . Market Shrink 5% per Year 1993-1996 (Farkas-Berkowitz) . We believe the start up of Marine Shale's facility will result in substantial additional capacity and add significant competitive pressure OFF-SITE HAZARDOUS WASTE MANAGEMENT BUSINESS IS DECLINING [Subtitle C Hazardous Waste Landfill Disposal Volumes Graph Showing Volumes for years 1989-1996 Source EI Digest 1989 3,263,000 cu yds 1993 3,514,000 cu yds 1990 3,373,000 cu yds 1994 3,639,000 cu yds 1991 3,350,000 cu yds 1995 2,703,000 cu yds 1992 3,481,000 cu yds 1996 2,629,000 cu yds] OFF-SITE HAZARDOUS WASTE MANAGEMENT BUSINESS IS DECLINING LLE'S LIABILITIES ----------------- . Government Required Closure/Post Closure Care (financial assurance): $450 Million --includes Pinewood, S.C.: $140 Million (only 1 of 8 LLE hazardous waste landfills) . Projected Expenditures: $280 Million . Current Reserve: $183.1 Million . Financial assurance is provided by Laidlaw, Inc. Will they Continue to do so? OFF-SITE HAZARDOUS WASTE MANAGEMENT BUSINESS IS DECLINING The hazardous waste disposal industry continues to show signs of declining profitability and asset values. . Waste Management last week announced $3.5 billion of special charges -- including $2.9 billion of asset revaluation adjustments -- reducing shareholders' equity by more than 70%. . $0.9 billion of the total charge related to its chemical and hazardous waste business. . The asset revaluations in the hazardous waste business related primarily to recognizing the impaired value of its thermal, land disposal and fuels recycling facilities. . WMX's chairman also announced they expect "declines in hazardous waste revenues" in their 1998 outlook. SAFETY KLEEN AND LLE NOT SYNERGISTIC BUSINESSES S-K INDUSTRIAL CUSTOMER SERVICE NEEDS [Graphical representation of Safety-Kleen industrial customer needs survey performed mid-1997. 5,197 service needs were identified including parts cleaning, PCB's vacuum services, empty drum service, oil services, toxic metals, acids, bases, etc. Totals were categorized as follows: - -- Recycle/Reuse Services 3,368 65% - -- Compliance and Testing Services 745 14% - -- Onsite and Closed Loop Services 928 18% - -- Chemical Neutralization 89 2% - -- Landfill Incineration 67 1%] SAFETY KLEEN AND LLE NOT SYNERGISTIC BUSINESSES [Graphical representation of Safety-Kleen industrial customer waste service revenues from 1989-1997 in millions of dollars and separated by the following waste services categories.] 1989 1991 1993 1995 1997 Waste Fuel $14.30 $20.40 $ 56.20 $ 69.80 $ 75.40 Incineration $ 1.00 $10.50 $ 7.10 $ 5.60 $ 3.40 Water $ 0.60 $ 2.80 $ 8.80 $ 13.30 $ 14.60 Absorbent $ 0.00 $ 0.70 $ 3.00 $ 5.90 $ 10.80 Other Serv $ 0.00 $ 0.00 $ 0.50 $ 1.70 $ 7.80 Tech Serv $ 0.00 $ 0.00 $ 0.00 $ 0.00 $ 12.30 Parts Clean $40.00 $97.10 $118.00 $119.00 $137.00 LLE/ROLLINS "SYNERGIES" ARE NOT REPLICABLE IN AN SK/LLE COMBINATION . Rollins was in the same business as LLE with only 3,600 customers to support. Rollins was a company with $240 million in fiscal 1996 revenues and over $63 million in net losses in the 3-1/4 years prior to December 31, 1996. . Rollins already had transitioned 2 incinerators out of normal service prior to the merger due to under-utilization. L.L.E.'s Clive incinerator was operating at 29% of capacity and incurred $5 million of operating losses in the first half of 1997. It sat within a few miles of Rollins' Aragonite facility. These large fixed assets were easily made redundant. . L.L.E. recorded asset writedowns and reserves totaling approximately $0.5 billion in the merger, including $0.3 billion to writedown their own facilities. . This "accounting event" has enabled L.L.E. to reduce (non-cash) depreciation and amortization expense by approximately $38 million annually -- which represents approximately 40% of their reported $90 million in annual Rollins "synergies". . We believe L.L.E. has exhausted its opportunities for writedowns of its assets to benefit earnings. LLE'S WASTE INTERNALIZATION PROGRAM IS NOT FEASIBLE Technical Limitations of Commercial Incinerators . Incinerators Limited to a Maximum Thermal Input -- Design and Permit Limits on Total Heat Input (Btu/hr) -- High Energy Value Waste Streams Displace Available Capacity to Burn Low Energy Bearing Waste Streams . Our review concludes that internalization of Safety-Kleen Waste Volumes into Laidlaw is Clearly Not Practical -- S-K Waste Volumes Could Represent all of Laidlaw's Practical U.S. Capacity unless LLE reopens facilities they stated are/will be closed. . We Believe Cement Kilns Provide a Significant Savings in Disposal Costs Compared to Incinerators: -- We believe S-K Disposal Costs for Bulk Liquids and Solids Are Less Than Incinerator Variable Costs . Laidlaw Continues the Practice of Sending Blended Wastes as Fuel to Cement Kilns (including Holnam/S-K) LLE'S WASTE INTERNALIZATION PROGRAM IS NOT FEASIBLE 74% of Safety-Kleen's Waste is Recycled and Less than 2% is Incinerated [Graphical representation of Safety-Kleen's Waste Volumes by disposal methods. The four methods of disposal and the percentages are listed below. Recycled Products 74% Energy Recovery-Cement Kilns 23% Incineration 1.9% Other 1.1%] S-K BELIEVES: LLE SERIVCE CENTER PROPOSALS WOULD REDUCE GROSS PROFIT AVERAGE BRANCH EXPENSE BY TYPE [Graph showing breakdown of average annual costs for Safety-Kleen branches. The data includes ($000s) Materials/Disposal $593 Labor/Benefits $1,031 Transportation $301 Equipment at Customers $159 Facilities $210 Other $123] Branch sales/sevice people and trucks generate revenue of over $280,000 per capita and waste disposal is a function of sales volume. Therefore, we believe proposed cuts will impair revenue and profit. FURTHER PEOPLE CUTS WOULD LOSE BUSINESS LLE proposes to eliminate at least 600 personnel -- equivalent to all personnel in the Elgin Headquarters This is the centralized support for: . 5,000,000 Customer Transactions . 3,600 Fleet Vehicles . 1,400 Railcars . 1,000 Environmental Inspections . 330,000 Vendor Invoices Processed . 92 Railsites . 21,000 Fleet Maintenance Inspections . 146,000 Customer Calls . 90,000 Telemarketing Calls CONCLUSION SYNERGY SAVINGS & REVENUE REDUCTION ESTIMATED 1998 EPS ACCRETION/(DILUTION) [Table showing impact on SK/LLE combination of reduced service levels resulting from various synergy levels. - ------------------------------------------------------------------------------- Synergy Savings = $100MM Synergy Savings = $75MM 0% 28% 0% 2% % SK 5% 2% % SK 5% -24% Sales Lost 10% -24% Sales Lost 10% -50% 15% -51% 15% -76% 20% -77% 20% - ------------------------------------------------------------------------------- Synergy Savings = $50MM Synergy Savings = $25MM 0% -25% 0% -51% % SK 5% -51% % SK 5% -77% Sales Lost 10% -77% Sales Lost 10% 15% 15% 20% 20% - ------------------------------------------------------------------------------- ("% Sales Lost" for this analysis is SK service revenue lost, with SK service revenue assumed to be $797.8 million, or the estimated level of service revenue for the LTM period ended 8/31/98. Note that service revenue excludes revenue from Oil Services and Europe. The related reduction in SK COGS is calculated assuming that the variable cost represents approximately 39% of US Industrial and Automotive service revenue (based on fiscal 1997 actuals).)] CONCLUSION Bottom Line: Will an LLE/SK Combination Be Synergistic? . We believe a Laidlaw acquisition brings: - A declining hazardous waste disposal business to burden Safety-Kleen's service and recycling business. - The weight and demands of $2.3 billion in debt - Substantial environmental remediation and closure liabilities - An increase in the shares and public float of stock by 270% - Business concern that these burdens and proposed deep cuts in people will decrease productivity and financial results - Synergies which will be dilutive if not achieved and could impair financial performance if achieved