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III <br /> Ge o sMtee ° 3043 Gold Canal Drive,Suite 100 <br /> Rancho Cordova,California 95670 <br /> PH 916.637.8048 <br /> consultants %"Niv.geosynteecom <br /> 27 July 2023 <br /> San Joaquin County <br /> Environmental Health Department <br /> 1868 East Hazelton Avenue <br /> Stockton, CA 95205 <br /> Subject: Piezometer Installation Permit Application <br /> Central Valley Compost, Lathrop, California 95330 <br /> To Whom It May Concern: <br /> On behalf of USA Waste of California, Geosyntec is planning to install three approximately 25- <br /> foot deep 2-inch diameter Schedule 40 PVC piezometers at the Central Valley Compost (CVC) <br /> facility at 916 Frewert Road in Lathrop, California (APN 19126022). The piezometers will be <br /> installed using hollow stem drilling methodology. The selected driller, Penecore Drilling, is a C- <br /> 57 certified environmental driller. In email correspondence dated 4 May 2023 the Central Valley <br /> Regional Water Quality Control Board (CVRWQCB) requested the installation of three <br /> piezometers in first encountered groundwater at the Site. Groundwater is anticipated to be <br /> encountered at a depth of approximately 5-feet below ground surface. Therefore, an <br /> approximately 5-foot surface seat is anticipated to be required for each piezometer to screen <br /> within first groundwater. <br /> Please find the enclosed well permit application package. Included in this application package <br /> are the following: <br /> • Attachment 1 — Well and Boring Permit Application, including maps and Penecore <br /> Drilling C-57 licensed contractor declaration; <br /> • Attachment 2—Piezometer Installation Work plan <br /> • Attachment 3—CVRWQCB Approval of the work plan to install the piezometers; <br /> • Site Mitigation Master File Record Information Form; and <br /> • Payment check in the amount of$936 for the permit application <br /> This work is scheduled for late August 2023 pending San Joaquin County approval of this <br /> permit. Please don't hesitate to contact me if you have any questions regarding this permit <br /> application. Thank you for your time. <br /> Sincerely, <br /> Jamie Purcell <br /> Phone: 530-771-7497 <br /> Email: iwpurcellnngeosyntec.com <br /> engineers I scientists I innovators <br />