ARCHIVED REPORTS_XR0008936 - Laserfiche WebLink

Home Browse Search

KLEI NFELDER (Tom O. Morrow, Inc.) Adjustments were then made to each independent survey, assuming internal consistency, to reduce the elevations to a common datum. The seven well elevations at Unocal were resurveyed. The resulting casing elevations used in this survey are presented in Table 1. Depth-to-water measurements and water elevations for June 2, 1989, are summarized in Table 2 Floating product was observed in piezometers P11 through P16 along Stork Road. Samples of the floating product were collected from P12 and P16 and were submitted to the analytical laboratory, Enseco, for analysis of total petroleum hydrocarbons (TPH) by GG- FID 3 2 GROUND WATER SAMPLING Ground water samples were collected from MW-1 through MW-7 at the Unocal facility on May 31, 1989 A duplicate sample was collected at MW-6 and an equipment blank was collected after sampling MW-5 Sampling protocol for each well was as follows 1 Down-well equipment (the water level probe and bailer) was decontaminated by steam cleaning followed by a distilled water rinse prior to used in each well Bailer cord was replaced prior to use in each well 2 The depth-to-water was measured using a conductivity-based water level probe 3. The volume of water standing in the well was calculated 4 Five well volumes of water were purged from each well using a 2-inch Teflon bailer, with the exception of MW-3 and MW-5 MW-3 and MW-5 recharged slowly Therefore, the water in these wells was removed with the bailer and the wells were sampled after they recharged to approximately 80 percent of their initial volumes 5 Physical parameters (pH, temperature, and electrical conductivity) were monitored for stability during purging. 6 A sample was collected with a 2-inch Teflon bailer The water samples were observed to be slightly effervescent (see purge characterization/sample logs in Appendix A). 194-89-1112 6