09/30/93 PETROLEUM NEWS & QUOTES Crude-oil and products prices strengthened further Thursday in a follow-through to the previous day's OPEC accord, with traders showing confidence the cartel might have succeeded in bringing some semblance of production discipline among its members. Recalcitrant cartel members accepted quotas below what they had demanded when the oil ministers first convened last weekend in Geneva. A federal judge has ordered Shell Oil, Atlantic Richfield, Texaco, Union Oil of California as well as the property owner McAuley LCX Corp to pay for cleaning up toxic waste at a suburban Los Angeles dump, the Environmental Protection Agency said Thursday. The companies were ordered to reimburse the government for more than $25 million authorities have already spent on the site, which falls under the federal Superfund toxic-waste law. Officials estimate future cleanup costs at $80 million. The four oil companies had nearly 100,000 cubic yards of highly acidic sludge dumped at the site during the 1940s. INT'L SPOT MARKET THURSDAY WEDNESDAY UAE'S DUBAI LIGHT CRUDE $15.06-15.10 $15.00-15.04 NORTH SEA BRENT CRUDE $17.24-17.28 $17.18-17.21 WEST TEXAS INTERMEDIATE CRUDE $18.75-18.80 $18.65-18.70 LIGHT LOUISIANA SWEET $18.95-19.00 $18.85-18.90 NORTH SEA BRENT, (IPE) NOV $17.43 $17.35 SPOT MARKET (PER 100 GALLONS) UNLEADED GASOLINE (GULF) $49.62-49.67 $49.47-49.62 NO. 2 HEATING OIL (NY) $56.10-56.25 $54.92-55.17 DTN STOCK MKT 02 09/30/93 DTN/WALL STREET/THE STOCK MARKET 4:50 P.M. CDT