ARCHIVED REPORTS_XR0003150 - Laserfiche WebLink

Home Browse Search

Ms Vicky McCartney May 23, 2005 . Page 2 of 6 large tree and roof eave overhang The location of boring SBD had to be moved further south than originally proposed to avoid a propane tank and concrete slab A copy of the drilling permit issued by San Joaquin County Environmental Health Department is included in Attachment A Copies of boring logs are contained in Attachment B Soil samples were collected at 5-foot intervals from borings SBA, SBB, SBE, SBF, and SBG for soil characterization, subjective evaluation of hydrocarbon contamination using a photoionization detector (PID), and possible laboratory analyses Shallow soil encountered during the drilling of SBC and SBD was completely saturated due to heavy rainfall and the boreholes quickly filled with water To ensure that water samples from these borings were representative of actual groundwater, the borings were advanced directly to 50 feet bgs without collecting soil samples Soil samples selected for analysis, based upon field observations and PID readings, were sealed, labeled, and immediately placed in an iced cooler for transportation under chain of custody protocol to State- certified Argon Laboratories (FLAP No 2359) for analysis The samples were analyzed for total petroleum hydrocarbons as gasoline (TPHg) using EPA method 8015B, and benzene, toluene, ethylbenzene, and total xylenes (BTEX) using EPA Method 8021 B All drilling and sampling equipment was decontaminated prior to use and between sample collection events to minimize the possibility of cross contamination After sampling, the borings were grouted from the bottom to the ground surface using neat cement grout • Discrete Groundwater Sampling P la Discrete groundwater samples were collected from borings SBA, SBB, SBC, SBD, SBF, and SBG Attempts were made to collect the water samples using a Hydropunch sampler These were unsuccessful due to insufficient groundwater influx into the Hydropunch device Consequently, 3/4- inch diameter, PVC casing and screen was temporarily installed in each of the bonngs Discrete groundwater samples were collected by inserting a length of small-diameter PVC and polyethylene tubing with a stainless steel check valve into the temporary well casing The samples were collected into 40-m1 VOA vials containing hydrochloric acid preservative, sealed, labeled, and immediately placed in an ice chest refrigerated to a temperature of approximately 4° Centigrade The samples were submitted to Argon Laboratories under chain of custody protocol for analysis of TPHg by EPA Method 8015, BTEX by EPA Method 802113, gasoline oxygenates [methyl tert butyl ether (MTBE), di-isopropyl ether (DIPE) ethyl tert butyl ether (ETBE), tert amyl methyl ether (TAME), tert butyl alcohol (TBA)] and additives including 1,2-dichloroethane (1,2-DCA) by EPA Method 8260B The 8260B analysis of samples from borings SBC, SBD, SBF and SBG also included 1,2-dibromoethane (EDB) 0 1GROUNDZEIW-ENSAR1200511 SAR05bonogreport doc