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Nov 15 99 08: 39a Bob Ratz (612) 472-2362 p. 2 <br /> Insituform - <br /> Worldwide Pipeline 12450 Wayzata Blvd. <br /> Rehabilitation Suite 224 y Tel: (612)472-1692 <br /> Minnetonka,MN 55305 Fax:(612)472-2362 <br /> (800)325-1159 <br /> www.insilutorm.com <br /> SEH RCM November 15 <br /> 1999 <br /> 10901 Red Circle Drive suite 200 <br /> Minnetonka MN 55343 <br /> ATTN-. Dick Potts <br /> RE: Insituform Process Project: <br /> 33`d Avenue St. Anthony,Minnesota <br /> Dear Mr.: <br /> The Insituform process was developed to provide a means of reconstructing existing pipe, conduit <br /> t or passageways without extensive excavation. Some typical applications include: <br /> ' 1• Halting settlement by stopping infiltration of soil and bedding material which <br /> often accompanies groundwater infiltration causing soil voids and shifting ground in <br /> gravity pipelines. <br /> 2. Eliminating infiltration of groundwater through joints,breaks and missing <br /> ' sections of gravity pipelines- <br /> 3. Increasing the capacity of existing pipelines by smoothing the interior surface and <br /> providing smooth transitions over joints and protrusions. <br /> 4. Reducing maintenance and increasing capacity by reducing depositions and <br /> eliminating root intrusions into gravity pipelines. <br /> i � <br /> 5. Protection of pipe from attack by corrosive chemical effluent and vapors. <br /> 6. Eliminating the exfiltration of pollutants and chemicals into surrounding <br /> groundwater aquifers through joints and cracks in pipelines. <br /> 7. Elimination of pressure leaks in waterlines by sealing pinholes,joints and cracks. <br />