WORK PLANS - Laserfiche WebLink

Home Browse Search

ry KLEINFELUER of the southern UST area near former sample location SB-2 area (near former monitoring well MW-5). During the advancement of the borings, soil samples will be collected at five-foot intervals for lithologic classification and qualitative field screening, with an organic vapor analyzer (OVA). The OVA measures ionizable compounds in air in p 'rts per million by volume (ppmv). Lithologic classification will be based on the Unified Soil Classification System (USCS). At this time we propose to submit two soil samples fro Ti the 30 foot borings and three soil samples from the 50 foot soil boring for quantitative chemical analyses. Kleinfelder proposes collection of these soil samples from the 30-foot borings at depths of approximately 15 and 30 feet bgs, and at depths of approximately 30, 40 and 50 feet bgs from the 50 foot boring. However, submittal of samples for chemical analyses will Iso be based on field observations and on OVA readings. Seven soil samples from these the borings will be analyzed for the following: • Total Extractable Petroleum Hydrocarbons as referenced to Diesel and Motor oil [TPH-D/MO] by EPA Method 8015M/3015; • Total Purgeable Petroleum Hydrocarbons as referenced to gasoline [TPH-G] and Benzene, Toluene, Ethylbenzene, Total Xylenes [BTEX] by EPA Method 8015M/8260; • Five Oxygenates (ETBE, DIPE, MTBE, TAME and TBA), by EPA 8260. 2.3 MONITORING WELL INSTALLATION Kleinfelder proposes advancing a total of four well borings at the subject site, one near the former UST area and three along perimeter locations to assess potential offsite sources of concern and to assess the groundwater flow direction and gradient beneath the subject site. The three perimeter borings will be located near the nortem, eastern and southern property boundaries. Actual well locations of the borings may be dependent upon utilities and overhead obstructions. The borings will be advanced to an approximate depth of 0 feet below ground surface (bgs). A monitoring well will be constructed in the boring. An approximate fifteen to twenty foot screened interval will be used during construction of the wells, with approximately 5 to 10 feet of screen installed above and approximately 10 feet below first encountered groundwater. During the advancement of the borings, soil samples will be collected at five-foot intervals for lithologic classification and qualitative field screening, wi h an OVA. Lithologic classification will be based on the US CS. At this time we propose to submit one soil sample for qu titative chemical analyses from each well boring. The soil samples submitted for analysis from the boring will be based on OVA readings and field observations from soil samples collected at approximate 5-foot intervals. 02001PROP.ENV/ST03P327 Page 5 of I i ©2003 Kleinfelder,Inc. September 3,2003