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CHANGE ORDER # 4 <br />CITY OF SAN MARCOS, TEXAS <br />PROJECT: Oakridge Booster Pump Station <br />CONTRACTOR: Keystone Construction Inc. <br />ORIGINAL CONTRACT DATE: March 11, 2010 <br />CHANGE ORDER DATE: March 9, 2010 <br />WORK TO BE ADDED TO OR DELETED FROM SCOPE OF SERVICES <br />• Deduct 30 feet of overhead electric service. <br />• Add 60 feet of underground electric service with concrete encasement. <br />• Modify the hydro pneumatic tank controls to include a manifold, site glass, and sensors. <br />• Add a concrete LAS ramp into the existing. <br />• Clear and grub the new PEC easement to facilitate construction of the overhead electric <br />lines. <br />• Demolish and haul the existing concrete air compressor building foundation. <br />• Demolish and haul the existing hydro pneumatic tank and concrete tank foundation. <br />• Revise the grading and include a retaining wall, if necessary, near the foundation of GST <br />#1 and the drainage channel. <br />Change in contract time 87 days <br />Previous contract amount: $ 821,038.22 <br />Net increase /decrease in contract amount: $ 37,354.10 <br />Revised contract amount: $ 858,392.32 <br />Previous contract time of completion (substantial /final) 340 / 370 days <br />Net increase /decrease in contract time of completion 87 days <br />Revised contract time of completion (substantial /final) 427 / 457 days <br />Percent of Change 4.5% <br />Recomme <br />Engi r: <br />by: Date: 3 <br />T. ason Roberts, P.E. <br />Project Manager, Associate <br />Change Form 6/712004 <br />