TETRA TECH, INC. 6 - 2014 - Laserfiche WebLink

Home Browse Search

M-\ Mailing \Propo5u[S \WTM \rY2olh\ WT042_9A-OnCnlisngrg -1G- TETRA TECH pipe. All permits will be procured to C. Leighton will complete laboratory testing perform the potholing. All potholes will and perform geotechnical analysis of the backfilled using native soil and capped collected data. with permanent cold patch. If duct banks D. Leighton will prepare a geotechnical report are potholed, the top and bottom of the presenting the findings and duct bank will be field verified recommendations, including groundwater 6. Survey and Right- of-Way conditions, ease of excavation, temporary A. Provide survey control using County GPS shoring design, and pipe beddnng recommendations. points. B. Provide field survey profile over the 9. Alignment Selection proposed sewer pipeline at 100 -foot A. Tetra Tech will prepare preliminary intervals. This is a similar approach to drawings (30% milestone) as required to what we used for the Westminster Avenue establish agreement on scope, alignment, Sewer Improvement Project. parameters, maintenance concerns, C. Field locate and dip existing sewer constructability, traffic impacts, and manholes, connection points and storm general disruption to the area. We will drain crossings along the proposed submit the preliminary design to the City alignment for all pipelines. of Santa Ana staff for review and approval. The basis of design technical memorandum D. Tetra Tech will prepare the base maps will address the following subjects: using the above survey information, street 1) Evaluation of replacement in same improvement plans (the latest, most recent alignment verses parallel alignment improvement plans), and supplemented 2) Water and sewer main alignment, with Google aerial map. Tetra Tech will including evaluation of the impact t act to plot utilities on the base maps based on adjacent businesses, residences and information obtained from the utility traffic information as well as from USA markings 2) Manhole locations and connection to in the field. Tetra Tech will perform all existing manholes necessary research to obtain the necessary 3) Maintaining existing service right- of-way information. connections 8. Geotechnical Investigation A) Hydraulics based on slopes A. Leighton Consulting, Inc. will perform the 5) Method of construction, especially at geotechnical investigation. The the major street crossings geotechnical exploration will provide the 6) Traffic control concepts design team and Contractor with the 7) Construction schedule and phasing expected subsurface and groundwater and construction cost estimate conditions at the project site that will assist 8) Conflicts with other utilities in design and construction of the proposed 9) Potholing recommendations 10) Abandonment of existing water and improvements. sewers (if select parallel alignment) B. Leighton will perform subsurface 11) Areas where construction work is exploration consisting of drilling, logging limited or controlled and sampling of three (3) hollow -stem 12) Permit requirements auger borings to a depth of 15 feet below 11 CEQA Documentation the existing grade. The borings will be spaced along the length of the project. The A. Tetra Tech will prepare documentation borings will be backfilled with soil cuttings required to fulfill the California and patched with cold -mix asphalt. Traffic Environmental Quality Act (CEQA) control will be provided, as necessary. requirements. We have assumed a Negative Declaration will be required for M-\ Mailing \Propo5u[S \WTM \rY2olh\ WT042_9A-OnCnlisngrg -1G- TETRA TECH