Exhibit 10.13 PURCHASE AND SALE AGREEMENT --------------------------- THIS PURCHASE AND SALE AGREEMENT (this "Agreement"), made this January 30, 1998, is entered into between McCUTCHAN AND PATTERSON, an Oklahoma general partnership, whose Partners are...Purchase and Sale Agreement • March 24th, 1998 • National Environmental Service Co • Hazardous waste management • Oklahoma
ARTICLE I. TERMS OF THE MERGER. -------------------Agreement and Plan of Merger • March 24th, 1998 • National Environmental Service Co • Hazardous waste management • Oklahoma
Exhibit 10.11 PRIVATE PLACEMENT AGENCY AGREEMENT This AGREEMENT, made effective as of the 30th day of December 1997, by and between NATIONAL ENVIRONMENTAL SERVICE CO., an Oklahoma corporation (the "Company"), and PEACOCK, HISLOP, STALEY & GIVEN, INC.,...Private Placement Agency Agreement • March 24th, 1998 • National Environmental Service Co • Hazardous waste management • Arizona
