ARCHIVED REPORTS_XR0011953 - Laserfiche WebLink

Home Browse Search

Additional Groundwater investigation Report CSUS Multi-Campus Regional Center August 19,2003 Page 6 �. CPT4 was advanced to a depth of approximately I00-feet bgs, CPT-5 was advanced to a depth of . i approximately 100 feet bgs, CPT-6 was advanced to a depth of:approximately 100 feet bgs, CPT-7 was advanced to a depth of approximately 130 feet bgs, and CPT-8 was advanced to a depth of approximately 1.35 feet bgs. From the surface to approximately 50 feet bgs, soils encountered by the borings were predominantly interbedded clays and silts with interspersed sand horizons. Silty and sandy horizons form discontinuous, undulatory interbeds and lenticular features of variable thickness. At depths greater than 50 feet bgs, the soils encountered by the borings were predominantly continuous horizons of interbedded silts and sands interspersed with:undulatory clay horizons. A relatively continuous, coarse sand horizon was encountered in boreholes CPT-7 and CPT-8 at approximately,115 to 134 feet bgs. 4.2 RESULTS OF LABORATORY ANALYSES As described in Section 4.3.1 of this report, groundwater samples from the direct push borings were submitted for laboratory analyses. The laboratory analytical results of the groundwater samples are included in Table 2, on the following pages, and in ;Figure 3, Attachment A. Copies of laboratory analytical results and chain-of-custody records for the groundwater samples collected during the April 2003 additional groundwater investigation are included in Appendix C. A discussion of the groundwater sample analytical results is included in section 5.0 of this report. i I Is -•_ CON©O h -