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BISSELL & - <br /> , KARN. INC. <br /> <br /> S EP I 1987 ..37 c..bo, .:.. s.,,. <br /> Pleasanton. CA ~ <br /> (415) 46) <br /> <br />August 31, 1987 Job ~8704139 <br /> <br /> Mr. Joe E11 i ott <br /> Director of Public Works and <br /> Utilities <br />City of Pleasanton <br /> 200 Bernal Avenue <br /> Pleasanton, California 94566 <br /> <br />Subject: Engineering Services Proposal for Assistance in Evaluation and <br /> Correction of Pressure Problems in the Bonde Zone <br />Dear ~~'~: <br />As you requested at our meeting August 24, 1987, Bissell & Karn, Inc., is <br />pleased to submit this proposal for the subject services. We have prepared <br />the following proposal and scope of work based on our discussions at that <br />time and the memo from Dave Van houten to Bill Wilkins describing the <br />problems. <br /> <br />SCOPE OF WORK <br /> <br />Our general approach to the problem would be to systematically review the <br />operational data that has been collected, along wit'h other available data <br />describing system operation, capabilities and performance. Additional data <br />reviewed would include system topography, records of service line breaks, <br />pump curves, and control settings. Based on the available data, we would <br />make a preliminary determination of the likely cause or causes of the <br />service line failures. We would then work with City staff to make a final <br />determination of the cause through fielc insDec~ion and testing. Once the <br />cause of the problem is identi.:ied we wsuid ,serelop recommendations for <br />appropriate corrective =-easures. Our specifi: ap;~roach would be somewhat <br />dependent on what the problem appears to be and the extent and completeness <br />of available data. The following is a list of tasks that we anticipate may <br />be required. Additional services would be provided as required. <br /> <br /> o Meet with City staff to review their observations and obtain copies <br /> of relevant operating and system data. <br /> <br /> o Conduct a site visit to the pump stations and reservoir to confirm <br /> actual field conditions and gain familiarity with the system. <br /> <br /> o On topographic maps provided by City staff delineate relevant break <br /> locations, hydraulic gradient elevations, pressures and flows and <br /> comparable master plan model data. <br /> <br />LCP.iO.4 <br /> <br /> <br />