COMPLIANCE INFO_1998-2006 - Laserfiche WebLink

Home Browse Search

Mar -19-99 02:46pm From-TAIT & ASSOCIATES/TAIT ENVIR MGMT (TEMI 7145609235 T-150 P 03/05 F-293 San Joaquin County of Public Works Workplan for Site Assessment O The objective of the scope of work is to: tilarch 18, 1999 ® Assess the vertical and lateral extent of petroleum fuel hydrocarbon in the subsurface. ® Investigate the possibility of any impact to groundwater if encountered during assessment The scope of work that TEM has developed to meet the objectives includes the following tasks: Task 1: Health and Safety Plan Modification A health and safety plan (HSP) will be prepared for the proposed scope of work. The HSP is designed primarily to minimize exposure of TEM personnel and its subcontractors to potentially hazardous materials. The plan will be prepared under the direction of the Corporate Health and Safety Officer and will be implemented in the field by the Site Safety Officer. Task 2: Drilling and Soil Sampling One (1) boring will be drilled out using 10 -inch outside diameter (OD) hollow stem augers w a maximum depth of approximately 20 feet bgs. One (1) slant boring will be advanced to approximately 30 feet bgs. Samples collected from the borings will be used to assess the vertical and lateral impact in the soil. Soil samples will be collected at five-foot intervals and/or where changes in lithology are observed. Samples will be collected in 2 -inch diameter by 6 -inch long brass cylinders that have been decontaminated, and the ends will be covered with Teflon and capped with polyethylene caps. A TEM geologist, trained and supervised by a registered geologist, will describe soil samples using the Unified Soil Classification System. The geologist will use a Photoionization Detector (PID) to screen the soil samples in the field for the presence of volatile organic compounds (VOCs) and to select soil samples for laboratory analyses. Task 3: Laboratory Analyses Up to four (4) soil samples will be collected from each of the borings and submitted to a laboratory for analyses. The soil samples will be analyzed for the gasoline fraction of total petroleum hydrocarbons (TPH-G) or (TPH-D) using California OHS method for TPH (8015 modified). Benzene, toluene, ethylbenzene. and total xylenes (BTEX) and MTBE will be analyzed via EPA Method No. 8020. IN addition, the soil samples will be analyzed for TRPH using EPA Method No. 418. 1. 3 �_ .