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Sims-Grupe 2 27 March 2024 monitoring activities or submitted electronic data reports in accordance with the MRP Order requirements since the third quarter 2021. II. Legal Requirements The required tasks and associated compliance dates described in MRP Order No. R5-2019-0806 are in effect and enforceable pursuant to Water Code section 13267. As stated in the MRP Order, groundwater monitoring activities shall continue until the Assistant Executive Officer determines that cleanup objectives have been accomplished, a party currently unnamed in the MRP Order is deemed responsible for the PCE release(s), or the MRP Order is rescinded in writing or otherwise amended. III. Evidence/Violations The 7 June 2022 Central Valley Water Board staff letter requested, in addition to further Site assessment, resumption of quarterly monitoring sampling and submission of corresponding electronic data report by 1 August 2022. The 15 July 2022 email correspondence from Environmental Engineering, Consulting & Remediation, Inc. (E2C; the consultant hired by the Responsible Party) stated it would inform Central Valley Water Board staff at least 48 hours in advance of the next groundwater monitoring sampling event. Subsequently, no quarterly groundwater monitoring was conducted, and quarterly data reports have not been submitted. The 9 January 2024 Central Valley Water Board staff letter reiterated the absence of groundwater monitoring in accordance with the MRP Order. A 9 January 2024 email from E2C indicated, "In our files I found a 4th Quarter 2021 Quarterly Monitoring Report and a GeoTracker upload "Success"form for this report. I can send them to you if you'd like. I also found groundwater monitoring forms and laboratory analytical data for the 2nd and 4th Quarters of 2022 as well as the 3rd Quarter 2023. 1 did not find completed reports for these data." On 10 January 2024, Central Valley Water Board staff responded to the E2C 9 January 2024 email and stated that the most recent groundwater monitoring data submitted to GeoTracker is the third quarter 2021 sampling event (received on 21 February 2021). Board staff additionally stated that any monitoring conducted after the third quarter 2021 could be presented in a single report with geo-well data and analytical laboratory data being uploaded to GeoTracker. Central Valley Water Board staff sent an additional email correspondence dated 27 February 2024 to Responsible Party and E2C asking for the status of the required monitoring. This email requested a response on the status of reports by 8 March 2024. Board staff have not received any evidence of the required groundwater monitoring post third quarter 2021 or any groundwater monitoring reports required in the MRP Order.