ARCHIVED REPORTS XR0001192 - Laserfiche WebLink

Home Browse Search

Mr John Benedict Protect No 880-039 1A Page 3 May 8, 2002 hydrocarbons in the groundwater Shaw E & 1, Inc 's sampling and analysts procedures are Y ' presented in Appendix B The groundwater samples were analyzed at Sparger Technology in Sacramento, California, ' for TPH-g using U S Environmental Protection Agency (USEPA) Modified Methods 8015, and for BTEX and MTBE using USEPA Method 8020 Copies of the chain-of-custody records and laboratory analysts reports are presented in Appendix C The results of laboratory analyses indicated that dissolved hydrocarbons were present to two Of the four wells sampled TPH-g was detected to VW-2 and VW-3 at concentrations of 29,000, and 7,600 micrograms per liter (pg/L.), respectively Benzene was reported to VW-2 and VW-3 at 2,800, and 750 pg/t-, respectively MTBE was below laboratory reporting limits in groundwater samples collected during the first quarter 2002 sampling event Results of laboratory analyses are summarized to the Table 1 Onsite vapor wells were surveyed by a licensed surveyor during the first quarter 2002 The data collected was used to evaluate the groundwater gradient at the site The gradient was approximately 0 002 foot per foot (ft/ft) to the northwest (Figure 3) Groundwater flow and analytical data for the subject site are also summarized on Figures 3 and 4, respectively REMEDIATION SYSTEM STATUS: FIRST QUARTER 2002 tem consists of four shallow zone and three dee The remediation system P zone SVE wells, ' from which soil vapors are extracted using a Stealth Bobcat Catalytic Oxidizer rated at 100 cubic feet per minute (cfm) Startup of the remediation system occurred on February 3, 2000, under the supervision of regulatory personnel Subsequently, Shaw E & I, Inc staff perform weekly system O&M, collects influent and effluent air samples monthly to accordance with air board permit requirements, and reports quarterly to the air board N isacDP120021PRJ1PJ8188018800391A 2ad doc