ARCHIVED REPORTS XR0008697 - Laserfiche WebLink

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July 6, 2001 Page 3 As required by the Occupational Health and Safety Administration (OSHA) Standard "Hazardous Waste Operations and Emergency Response" guidelines (29 CFR 1910 120), and by California Occupational Health and Safety Administration (Cal-OSHA) "Hazardous Waste Operations and Emergency Response"guidelines (CCR Title 8, Section 5192), IT has prepared a Site-Specific Health and Safety Plan (SSP) Prior to the commencement of fieldwork the SSP will be updated with appropriate field personal and subcontractor information The field staff and contractors will review the SSP before beginning field operations at the site A draft SSP has been included in Attachment B The specific scope of work is discussed below • Monitoring Well Installation Three deep groundwater monitoring wells (MW-8 through MW-10) will be installed at the general locations shown on Figure 2 The proposed wells will be installed to a total depth of approximately 80 feet bgs and will be constructed with 10-foot screen intervals Anticipated depth to water is approximately 30 feet bgs Because petroleum hydrocarbon concentrations at the water table are relatively low to non-detectable, conductor 1141e- casing / °1e-casing is not proposed for the deeper wells All work will be done in accordance with stipulations of permits obtained from the SJCPHS/EHD • Soil Selection and Analysis Soil samples will be collected every five vertical . feet in the borings Selected soil samples will be submitted to a Califorma State- certified laboratory and analyzed for the presence of total petroleum hydrocarbons quantified as gasoline (TPH-g), benzene, toluene, ethylbenzene, and total xylenes (BTEX), and methyl tertiary-butyl ether (MtBE) by EPA Methods 8015 Modified and 8020 The highest MtBE detection from each boring will be confirmed by EPA Method 8260 No additional oxygenate analysis of soil samples will be conducted based upon non-detection of DIPE, ETBE, TAME and TBA in over-excavation soil samples at depths of 11 and 13 feet bgs Sampling and analytical methods are presented in Attachment C • Groundwater Analysis. Groundwater samples will be submitted to a California State-certified laboratory for analysis Groundwater samples will be analyzed for the presence of TPH-g, BTEX, and for five oxygenates (MtBE, Di-isopropyl ether [DIPE], Ethyl tertiary-butyl ether [ETBE], Tert-amyl methyl ether [TAME] and Tertiary butyl alcohol [TBA]), 1,2-Dichioroethane (1,2-DCA), and Ethylene dibromide (EDB) using EPA Methods 8015 Modified, 8020 and 8260, respectively • Well Surveying. Upon completion of well construction, the wells will be surveyed by a licensed surveyor for location and elevation relative to mean sea level Groundwater gradient will be interpreted utilizing wellhead elevations and ,depths to water _ff COAV09n017 SAC 1N 1sacDP120011PRAPJ81828800 laa doc-00\1t 1 Rev 0,07/06/01 (01000000)