Request for Proposal for Geotechnical Services For Aquatic/Community Center At Heather Farm Park

Geotechnical Services For Aquatic/Community Center At Heather Farm Park Provide Design-Level, Geotechnical Recommendations For The Project As Presently Proposed. The Investigation Will Include A Field Exploration Program, Geotechnical Laboratory Testing, Engineering Analysis, And Report Preparation, Based On The Following Scope Of Services: • Review Geologic Maps And Geotechnical Reports To Aid In Evaluating If Geologic Hazards Are Present At Or Near The Site. 2 • Review Available Design/Location As-Built Plans To Select Exploration Locations. • Perform A Site Reconnaissance To Review Project Limits, Confirm Equipment Access And Mark Out Exploration Locations For Subsequent Utility Clearance. • Notify Subscribing Utility Companies Via Underground Service Alert (Usa) A Minimum Of 72 Hours (As Required By Law) Prior To Performing Soil Borings At The Site. • Retain The Services Of A Private Utility Locator To Aid In Delineating Underground Utilities In The Vicinity Of The Planned Soil Borings. A Private Utility Locator Can Generally Detect Electronically Conductive Utilities Such As Metal Pipes And Utilities Accompanied By A Tracer Wire But Non-Electronically Conductive Or Non-Magnetic Utilities Such As Clay Or Transite Pipe May Benon-Detectable. • Engage A Dedicated Concrete Coring Subcontractor To Core Pond Concrete Deck Or Other Concrete Flatwork At Boring Locations Where Limited Access Drilling Equipment Will Be Used. • Retain The Services Of A California C57-Licensed Drilling Subcontractor To Perform Exploratory Borings With A Conventional Truck-Mounted Rig And Portable, Limitedaccess Drilling Equipment. • Obtain A Soil Boring Permit From Contra Costa County And Pay The Requisite Fees If Necessary. • Perform Ten To Twelve Hollow- And/Or Solid-Stem Auger Borings To Maximum Depths Of Approximately 20 Feet Or Less To Observe And Sample The Prevailing Soils Conditions. Anticipate Performing Five To Seven Borings With A Truck-Mounted Drill Rig And Four To Five Borings With Limited Access Drilling Equipment. • Obtain Representative Soil Samples From The Exploratory Borings And Provide Laboratory Examination And Testing. • Log The Soils Encountered In The Borings In Accordance With The Unified Soil Classification System. Upon Completion, The Borings Will Be Backfilled With In Accordance With Permit Requirements. Excess Soil Cuttings Will Be Removed For Offsite Disposal By The Drilling Contractor. Borings In Pavement Areas Will Be Capped With Cold Patch Asphalt Or Quickset Concrete Dyed Black. Borings In Pond Deck Areas Will Be Capped With Quick- Set Concrete. • Perform Laboratory Tests On Selected Samples To Evaluate Pertinent Geotechnical Parameters. Laboratory Testing Assignments Will Be Based On The Soils Conditions Encountered In Field Exploration; Testing For Shear Strength, Gradation, In-Situ Dry Density And Moisture Content, Plasticity, And Expansion Potential May Be Performed. In Addition, Three Soil Samples Will Be Submitted To Our Laboratory For Screening-Level Corrosion Testing. • Prepare A Report With Conclusions And Recommendations For Project Design And Construction. The Report Will Include (But Not Be Limited To) The Following: • Site Vicinity Map