Laserfiche WebLink
0 <br />Prepared draft boring logs with well construction details showing screen in0rvals appropriately located to <br />p g g <br />intercept representative groundwater, and <br />Provided the Professional Geologist's electronic signature on the boring logs. <br />The submission of these documents meets the criteria set forth in the 6 March 2018 letter. Staff has determined from <br />review of these documents that the new wells installed coupled with the other site wells where groundwater can be <br />measured and sampled constitute a viable Detection Monitoring Program compliant with Title 27 and the WDRs. At this <br />time, waste disposal may be placed in module 513. If groundwater wells that make up the Detection Monitoring Program <br />become unusable in the future, the Discharger will be required to replace the wells as needed. Staff will place this email <br />in the electronic record. A formal response will be prepared and mailed to San Joaquin County at a later date. If you <br />have any questions do not hesitate to call or email. <br />From: Isham, Julian [mailto:Julian.lsham@aptim.com] <br />Sent: Friday, March 30, 2018 11:11 AM <br />To: DelFrate, Todd@Waterboards <Todd.Del Frate@waterboards.ca.gov>; Taj Bahadori <tbahadori@sigov.org>; <br />Chandra, Joyesh <Jchandra@sigov.org>; Juan Acevedo Carroll, Michael <br /><m ca rro l I @ s i go v. o rg> <br />Cc: Easter, Daniel <daniel.easter@aptim.com>; Tremblay, Cassandra <cassandra.tremblay@aptim.com> <br />Subject: FW: San Joaquin County's North County Landfill <br />Todd <br />In accordance with your March 6, 2018 letter, San Joaquin County has completed the following tasks <br />to demonstrate that the North County Sanitary Landfill (NCSL) has a compliant detection monitoring <br />program (DMP): <br />1. Surveyed and measured the depth to groundwater from all viable wells at the NCSL on March <br />29, 2018 as shown on the attached Water Level Survey sheet and groundwater contour map <br />(NCSL WLs 3-29-18 and NCSL 1St Quarter 2018 GW Contour Map) <br />2. Developed the wells as shown on the attached well development logs (NCSL Well <br />development logs G-10, G-11, & G-513) <br />3. Collected the initial groundwater samples on March 29, 2018 including the 5 -year Constituents <br />of Concern as shown on the attached Chain of Custody (COC) (NCSL COC G-10, G-11, & G - <br />5B); <br />4. Provided the Geologic Log and Construction Details of wells G-10, G-11, and G-513, which <br />shows that the screen was installed across the zone of first encountered saturated sediments <br />(Boring Logs Well Construction Jan -Mar 2018 signed my J.C. Isham). <br />This information shows that well G-10 acts as the background well for the site replacing well G-1 A, <br />which is currently dry. Wells G -5B, G-7, G-8, G-9, and G-11 are downgradient of the landfill and <br />provides a compliant DMP for the site. A well installation report for wells G-10, G-11, and G -5B will <br />be submitted with the First Semiannual 2018 Monitoring Report for the NCSL. Please call or email us <br />with your comments. <br />APTIM <br />(Formerly CB&I, Environmental and Infrastructure, Inc.) <br />Julian C. Isham PG, CEG, CHG <br />Geology Manager <br />Solid Waste Services <br />Cell: 925-457-1130 <br />julian.isham(cD_aptim.com <br />