LAYNE CHRISTENSEN COLOG DIVISION COLOG's leadership role in borehole geophysics for the groundwater, environmental, and engineering industries has been well established after nearly two decades of offering a superior level of services by our dedicated team of professional logging engineers. Instrumentation, software, applications and training are constantly reexamined and improved to provide our clients the highest quality product in the most cost effective manner possible. COLOG's commitment to the environment and their colleagues is evident by our active participation and contributions to numerous professional associations and organizations. Layne Christensen Co. – Colog Division 810 Quail Street, Suite E Lakewood, Colorado 80215 Tel: 303.279.0171    Cell: 303.517.8709 Fax: 303.278.0135 E-mail: colog@colog.com