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Proposal to Prepare a Geotechnical Investigation Report 10th and Flower Park Southeast Corner of 10th Street and Flower Street City of Santa Ana, Orange County, California February 21, 2023 Page 2 Converse Consultants R:\2023\32\23-32-103 23-32-103 DEA, 10th and Flower Park, Santa Ana (RFP 22-124) \Proposal/23-32-103_pro(01)parks  Potential features may include A skateboard court, basketball court and pedestrian bridge  Demolition of Garnsey Avenue The site is currently comprised of six separate parcels (APN’s 005-142-34, 005-142-35,005- 142-47, 005-142-48, 005-142-49, 005-142-58). The six lots are currently identified as Low- Density Residential (LR-7) land use and zoned Professional (P). They are all currently vacant dirt areas. SCOPE OF SERVICES Our scope of work will include the following tasks. Task 1: Project Set-up As part of the project set-up, personnel from our office will conduct the following.  Perform a site reconnaissance to verify existing conditions.  Review existing geology/geotechnical reports for properties in the vicinity.  Stake/mark the boring locations in the field so that drill rig access to all the locations is available. In case, the site has existing underground utilities, a representative from the city MUST clear the boring locations, Converse will not be liable for damage to any unmarked utility.  Notify Underground Service Alert (USA) at least 48 hours prior to field exploration to clear the boring locations of any conflict with existing underground utilities. Task 2: Subsurface Exploration Our subsurface exploration will consist of drilling exploratory borings. The purpose of the borings will be to:  Obtain subsurface information at the site.  Obtain undisturbed and bulk samples of the various soil types for laboratory testing.  Record depth to bedrock or groundwater (if encountered). We will drill 6 borings between 5.0 and 30.0 feet below existing ground surface (bgs) within the project site. If refusal is encountered before the planned depths are reached, the borings will be terminated at that depth. The borings will be drilled with a truck-mounted (CME 75 or equivalent) rig equipped with an 8- inch diameter hollow-stem auger for soil sampling. Relatively undisturbed ring and bulk samples of the subsurface soils will be obtained at frequent intervals in the borings. The undisturbed samples will be obtained with a California Modified Sampler (2.4-inch inside diameter and 3.0- inch outside diameter) lined with thin sample rings. The soil will be retained in brass rings (2.4 inches in diameter and 1.0 inch in height). The central portion of the sample will be retained and carefully sealed in waterproof plastic containers for shipment to our laboratory. Bulk soil samples will be collected in plastic bags and brought to our laboratory. Borings will be backfilled with soil cuttings. The mechanically driven hammer for the sampler is 140 pounds, falling 30 inches for each blow. The number of successive drops of the driving weight (“blows”) required for each six inches of penetration will be shown on the boring log. City Council 17 – 69 5/2/2023