EXHIBIT 4 STOCK PURCHASE AGREEMENT THIS AGREEMENT is made and entered into as of the 30th day of April, 1997, by and among National Environmental Service Co., an Oklahoma Corporation (the "Company") whose principal offices are located at 12331 East...Stock Purchase Agreement • August 8th, 1997 • National Environmental Service Co • Hazardous waste management • Oklahoma
RECITALSRevolving Credit and Term Loan Agreement • August 8th, 1997 • National Environmental Service Co • Hazardous waste management • Oklahoma
