ARCHIVED REPORTS_XR0003137 - Laserfiche WebLink

Home Browse Search

K L F I N F E L D E k The contaminant plume appears be on the shape of an oval in the vicinity of the former US r and measures approximately 220 by 160 feet The plume appears to be contained to the subject site although the northern extent appears in close proximity to the northern property boundary near industrial Drive ' This report details Klemfelder's findings for the 2nd Semi-Annual 2000 Groundwater Sampling event 20 FIELD ACTIVITIES On December 28, 2000, Klemfelder collected groundwater samples from three monitoring wells (MW-1, MW-2, and MW-3) at the project site (Plate 2) ' 2.1 Measurement of Groundwater Levels ' Upon arrival onsite, three onsite monitoring wells were opened and allowed to equilibrate After approximately 30 minutes, the depth to groundwater was measured in the three wells using a conductivity-based water level indicator The water level indicator was cleaned prior to use in each well to reduce the potential for cross-contamination Measurements were made to the surveyed mark on the north rim of each PVC monitoring well casing The water level measurements, groundwater elevation and gradient from October 1998 to December 2000 are ' summarized on the attached Table 2 22 Collection of Groundwater Samples Following obtaining groundwater depth measurements, Kleinfelder purged and sampled the three monitoring wells MW-1, MW-2 and MW-3 During the purging of the wells, field parameters including temperature, pH, and conductivity were monitored Monitoring wells were purged and sampled according to the protocol described in Attachment A, Section A-4 2 A moderate to strong petroleum-like odor was noted from purge water collected from MW-1 No floating ' product or sheen was noted during this sampling event Copies of the Purge Characterization and Sample Log Sheets are presented in Attachment B ' 23 Laboratory Anal sis ' The three water samples were transported under chain-of-custody control to Agricultural & Pnonty Pollutants Laboratones, Inc (APPL) of Fresno, California APPL is certified by the California State Department of Health Services (DHS) for the chemical analyses requested The three water samples were submitted for the following analyses • Benzene, Toluene, Ethylbenzene, Xylenes (BTEX) by Method 8015/8021B • Total Purgeable Petroleum Hydrocarbons as referenced to Gasoline (TPH-G) by EPA Method 8015/8021 B The samples were analyzed on a standard laboratory turnaround schedule requiring approximately 10 working days 20-4439-01 E02/2011 R355 Page 3 of 6 Copyright 2001,Klemfelder, Inc April 2,2001