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b) Determine Earthwork requirements: Pipe bedding, zone, and backfill requirements; <br />minimum depths; disposal of excess trench materials; finished grading, drainage, and re- <br />vegetation requirements. <br />c) Determine location, spacing, and sizing criteria for pipeline appurtenances. <br />d) Determine road crossing requirements and develop details. <br />e) Determine requirements for casings, concrete encasements, and utility crossing support. <br />f) Prepare pipeline Standard Details and Master Specifications. <br />3. Pump Station to include: <br />a) Hydraulic Analysis. Refine and update the system hydraulic analysis conducted during the <br />evaluation. Review existing pump information and curves. Develop new system curves. <br />Define pump operating points and ranges (flows and heads) and determine horsepower <br />requirements. Coordinate this effort with the pipeline hydraulic analysis. <br />b) Review existing wet well configuration and Hydraulic Institute criteria for pump stations. <br />Identify required modifications or upgrades needed at the wet well for proper operation of <br />the pumps and optimization of available water storage. It is assumed no computational <br />fluid dynamics (CFD) modeling or physical modeling is required for this task. <br />c) Identify modifications of the pumps and pumps' electrical equipment needed based upon <br />hydraulic analysis and wet well configuration modifications. <br />d) Operation and Control. Review operation and control functions, features, parameters, and <br />equipment for station including PLCs, SCADA, communications, pump start/stop <br />sequencing, etc. Prepare preliminary piping and instrumentation drawings (P &IDs), <br />control narratives, and lists of required features, functions, and equipment. <br />e) Prepare technical specifications for major equipment items. Anticipated items pump and <br />motor improvements, hydropneumatic tank, major valves and operators, and control <br />equipment. <br />f) Develop structural and mechanical plans and sections of pipeline and pump station. <br />g) Develop electrical and instrumentation plans and details, modifications to existing one - <br />line and typical MCC sections and wiring diagrams. <br />h) Identify erosion control measures that will be required in the contractor's erosion control <br />plan for the project. <br />E. Task 5 — Secondary Clarifier Crack Repairs <br />Identify the types of cracks the basins have and what repair systems will work best for the <br />type of cracks to include the following subtasks. Based upon current observations this only <br />includes clarifier no. 1 and clarifier no. 2. <br />a) Drain each clarifier and make a site visit to inspect cracks. <br />b) Measure and make an estimate of how many linear feet of repair is needed. <br />c) Based upon crack types, i.e. horizontal or vertical, identify repair products. <br />d) Develop specifications for products, acceptable methods of application, testing <br />requirements, and performance requirements and warranties. <br />CITY HALL a 630 EAST HOPKINS ® SAN MARCOS, TEXAS 78666 ® 512.393.8150 ® FACSIMILE 855.759 -2846 <br />SANMARCOSTX.GOV <br />