Agmt22 Regenesis Bioremediation Products

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REV: 10-05-2022 VR Consultant shall follow all applicable City Engineering Standard guidelines pertaining to project activities. Consultant shall be responsible for selecting and using equipment, drill rigs, and injection platforms to successfully complete the injection program for all remediation areas per industry standard protocol, subject to approval by the Public Works Director or designee. Consultant shall be responsible for providing equipment and the injection platform to obtain sufficient pressure and flow rates to achieve successful placement of compounds. Consultant affirms that the use of 1.5-inch direct-push rods are consistent with industry standards, will be of sufficient diameter to meet the recommended flow rate into each injection point, meets good engineering practice, and aligns with the intent of this agreement. Consultant shall be responsible for all costs resulting from slower injection rates, downtime, schedule delays, or any other issues associated with the use of 1.5-inch direct-push rods, which may or may not include using 2.25-inch direct-push rods instead. Consultant shall switch to 2.25-inch direct-push rods, as necessary, if they cannot obtain the desired results using the smaller 1.5-inch diameter rods. Public Works Director or designee shall not authorize any change orders associated with the use of 1.5-inch rods. Consultant shall ensure the delivery process of substrate, slurry mix into the subsurface meets or exceeds best practices per industry standard protocols and that the approach meets or exceeds the intent of this scope of work. Consultant shall be responsible for any costs resulting from the injection rate per point. Costs may include downtime, schedule delays, or other issues associated with their injection rate, which may or may not include injecting at a higher rate. Consultant shall inject at a higher rate with no additional cost if field verification indicates that the flow rates implemented by the Consultant do not appear to achieve the desired distribution of the injected reagents. Public Works Director or designee shall not authorize any change orders associated with the use of their injection rates. c. Former Areas of Excavation Consultant shall take into account the identified excavation areas on Figure 4 of Exhibit C when completing injections in the ERB Placement Area, “D” Wells Area and “E” Wells Area, as noted below. Note, monitoring well D-25 intercepted what appeared to be the edge of one excavation area. Consultant shall avoid injecting into the bulk of any identified or discovered backfill in former excavation areas. Consultant shall complete the injections at each probe location using a ‘top down’ approach. Consultant shall stop progressing downward following injection into a suspected soil/fill transition interval. The total mass of ZVI, ZVI/EVO or EVO designated for that specific 2-ft interval shall be injected into a soil/fill material transition interval. At that point, the Consultant shall temporarily cease operations and coordinate with the Public Works Director or designee to address injection at that interval. d. Wet Weather Consultant shall have PPE, equipment, and any other items readily available that are necessary to manage wet weather events during the course of this project in order to maintain operational efficiency and minimize delays. In the event of wet weather, Consultant shall provide, but are not limited to, an enclosed trailer to protect against the elements, plastic sheeting to cover any exposed product containers, construction ATTY/AGR.2022.348/Regenesis Bioremediation Products (Page 21 of 34)