SU0005871 - Laserfiche WebLink

Home Browse Search

2024 ANNUAL GROUNDWATER MONITORING REPORT TEICHERT AGGREGATES AND GRANITE CONSTRUCTION VERNALIS AREA approximate depth of 250 feet beneath the Vernalis Central Phase 1 and 8 that appeared to divide the underlying aquifer into shallow and deep zones.This clay is most likely the Corcoran Clay Member of the Tulare Formation,which has been reported to extend beneath much of the San Joaquin Valley, including the present monitoring network area (Hotchkiss, 1972). Further, the investigation indicated that the direction of groundwater flow in the shallow zone was predominantly to the southeast. Since 1994, groundwater levels have been obtained from a total of seventeen wells (Figure 2). Thoming irrigation well.The Thoming irrigation well was destroyed in early 2013. 4S/6E-6A1. Since 2006,water level measurements in the irrigation well 4S/6E-6A1 have been precluded by an obstruction at a depth of approximately 100 feet (bgs). Koster irrigation well. From fall 2018 through 2020,water level measurements in the Koster irrigation well were precluded by instrumentation of the California Department of Water Resources that lodged in the well casing. Water level measurements resumed from February 2021 through May 2023,when an electrical water level sounder got snagged in the Koster Well at approximately 161 feet bgs during quarterly monitoring. It was determined in August of 2023 that the Koster Well would be removed from the monitoring network due to landowner concerns about future entanglements in the well from monitoring equipment. Rustan domestic well. From 2016 through 2020,water level measurements in the Rustan well were infrequent due to site access limitations. Petz irrigation well. In August of 2022,the Petz irrigation well was removed from the monitoring network when, after installation of a pump, it was determined that the well was out of plumb, therefore, precluding the installation of a sounding tube. South Tracy#3 production well. Until spring 2021, South Tracy#3 had an obstruction at approximately 271 ft bgs and was only accessible for water levels that were above the obstructed depth. Since spring 2021,the obstruction is no longer present, and water levels have been obtained. Granite#3 production well. Prior to 2019, port access at the Granite#3 well had been difficult and only a few measurements had been obtained since this well was incorporated into the network in 2006. During spring 2019,the pump was removed from Granite#3 and water levels were obtained through fall 2021 when the sounding port was sealed. In November 2022, Granite#3 was accessible for water level measurements again when the welds were removed from the well head cover plate and water levels could be obtained from inside the well casing. Granite#4 production well. In fall 2017, Granite#4 and Brown's New well were rehabilitated. After the rehabilitation,the sounding port at Granite#4 was obstructed at approximately 370 ft bgs (approximately 285 ft bgs starting in 2020) and was only accessible for water levels that were above the LUHDORFF&SCALMANINI CONSULTING ENGINEERS 2