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<br /> <br />Consulting Services Agreement between City of San Leandro and August 24, 2023 <br />BSK for Annual Paving 2021-23 Exhibit A – Page 1 of 2 <br />EXHIBIT A <br /> <br />SCOPE OF SERVICES <br /> <br /> <br />The Annual Street Sealing Project 2021 -23 will install approximately 35,000 SY of microsurfacing, 380,000 of slurry <br />seal, and 293,000 SY of rubberized chip seal . <br /> <br />This contract is to provide Material Testing Services relation to Quality Assurance and Quality Control (QA/QC) for the <br />construction of the these improvements. Inspections are to be performed as required by the project specifications, and <br />/ or as directed by the project manager, and shall involve the following tasks: <br /> <br />Item Task Description Method Frequency <br />Slurry Seal / Microsurfacing Testing <br />1.1 Field observation and sampling of materials By Field Technician Days (7) <br />1.2 Determine the spread rate of slurry / microsurfacing to verify the <br />quantity placed per square yard <br />By Field Technician 7 EA <br />1.3 Determine the percent of residual asphalt in the slurry / microsurfacing <br />mix by extraction <br />ASTM D 2172 4 EA <br />1.4 Determine aggregate gradation Calf. Test. 202 4 EA <br />1.5 Determine sand equivalence Calf. Test. 217 2 EA <br />1.6 Determine durability index Calf. Test. 229 2 EA <br />1.7 Abrasion by LA rattler Calf. Test. 211 1 EA <br />1.8 Percent of crushed particles ASHTO T5 335 1 EA <br />1.9 Determine the properties of the asphaltic emulsion: <br />Viscosity <br />Sieve <br />Particle charge <br />Residue by evaporation <br />ASHTO T59 <br />4 EA <br />4 EA <br />4 EA <br />4 EA <br />Rubberized Chip Seal Testing <br />2.1 Field observation and sampling of materials By Field Technician Days (12) <br />2.2 Determine the spread rate of rubberized binder and spread rate of <br />aggregate (chips) to verify the quantity placed per square yard <br />By Field Technician 12 EA <br />2.3 Aggregate gradation Calf. Test. 202 3 EA <br />2.4 Determine gradation and wire and fabric content of CRM Calf. Test. 385 3 EA <br />2.5 Test scrap tire CRM and high natural CRM separately Calf. Test. 385 3 EA <br />2.6 Determine the properties of the asphaltic rubber binder: <br />Cone Penetration <br />Resilience <br />Softening Point <br />Viscosity <br /> <br />ASTM D 217 <br />ASTM D 5329 <br />ASTM D 36 <br />ASTM D 7741 <br /> <br />3 EA <br />3 EA <br />3 EA <br />3 EA <br /> <br /> <br />DocuSign Envelope ID: 7B75AD26-9318-40AB-955F-C0CC3601BA95