WORK PLANS - Laserfiche WebLink

Home Browse Search

' River Islands at Lathrop 5044.5.001.01 Monitoring Wells MW-13 through MW-22 January 13, 2006 ' MONITORING WELL LOCATION STUDY Page 2 PREVIOUS REPORTS ' Kleinfelder, 1999, Summary of Monitoring Well Installation and Sampling, Califia — Task 1, Phase I-B, Lathrop, California, File No. 20-1129-23.G02,dated May 21, 1999. ' Monitoring Wells MW-13 through MW-22 were not installed by Kleinfelder, but were identified by Kleinfelder in their 1999 study as "ten previously constructed, unsecured wells located on or near the property". However, according to the study, MW-17 was never located. The study also indicated that the well locations were never surveyed nor were they used to collect groundwater information at that time (Appendix A). tKleinfelder, 2000, Summary Report of Monitoring Well Sampling and Testing, Califia ' Development, Lathrop, California. File No. 20-4343-01,dated June 8, 2000. According to the 2000 Kleinfelder report, groundwater elevation measurements were collected ' between March 2, 1999, and January 5, 2000, from monitoring well locations MW-13 through MW-16 as well as MW-18 through MW-22 when possible. Monitoring Well MW-17 was never located and presumed to have been inadvertently destroyed prior to March 1999. ' The following information was obtained from the Record of Water Level Measurements collected in the field at the time of sampling and included in Appendix A of the Kleinfelder 2000 report: ' • March 2, 1999 — MW-14 could not be located. ' — MW-17 was not observed—inadvertently destroyed. — MW-18 was damaged—broken at ground level. • April 20, 1999 ' — MW-17 was not observed. • June 7, 1999 — MW-14, MW-19 and MW-21 were damaged. ' — MW-17 was not observed. • September 7, 1999 — MW-13, MW-14,MW-18,MW-19 and MW-21 were damaged. — MW-17 was not observed. • August 2, 1999 ' — MW-14, MW-18,MW-19 and MW-21 were damaged. MW-17 was not observed. • October 11, 1999 ' — MW-13, MW-14,MW-18,MW-19 and MW-21 were damaged. — MW-17 was not observed.