ARCHIVED REPORTS XR0009537 - Laserfiche WebLink

Home Browse Search

' Former Manna Pro Site Page 4 Quarterly Groundwater Monitoring Report ' Project No 207 2 March 2, 2000 ' Extreme care was exercised while collecting samples to prevent agitation of the water contained in the bailer Water samples were transferred from the bailer ' into 1 liter amber glass bottles and 40 ml VOA vials preserved with hydrochloric (provided by the analytical laboratory) All samples were checked for head space bubbles, labeled, inserted into foam holders and placed in an ice chest cooled to ' 4°C for transport to the laboratory Gasoline contaminated purge & rinseate water generated during the activities described above was stored in poly drums located on the site American Valley Environmental will remove this material prior to the next scheduled depth to water measuring event ' 2.2 Groundwater Sample Analyses ' Groundwater samples were analyzed as follows • Total Petroleum Hydrocarbons as Gasoline (TPH-G) by EPA method 8015(m) I • Total Petroleum Hydrocarbons as Diesel (TPH as Gasoline) by EPA method 3030/8015(m) '• • Benzene, Toluene, Ethylbenzene, and Xylene (BTEX) by EPA method 602 The detection limits are included in the summary analytical data table (Table 1) ' • Three of the samples were also tested for the presence of 1,2 Dichoroethane (DCA) by EPA method 8260 The detection limit for this chemical is 5 ppb ' Laboratory data sheets show that all but one of the bailer blanks as well as the trip blank contained a trace of xylene, generally at a concentration of 0 6 ppb The consistency of the blank sample results in conjunction with clean sample from MW-9 suggest that these blank sample results do not reflect on the cleanliness of the sampling bailer, but rather are an artifact of the water used to make up the blanks The sampling technician reported that all the blank samples were from a dug of distilled water purchased at a retail outlet ' Detectable levels of gasoline range petroleum hydrocarbons and/or BTEX compounds were found in water samples from eight of the nine wells which were ' sampled None of the three samples (MW-1, MW-2, or MW-6) tested for the chlorinated hydrocarbon 1,2 DCA contained detectable levels of that chemical The groundwater sample from monitoring well MW-8 was reported as containing 4480 ppb of gasoline range Total Petroleum Hydrocarbons (TPH) The laboratory data sheet is annotated to show that chromatogram is "not typical" of 2937 Veneman Ave,#B240 Geo-Phase Environmental Inc Phone (209) 569-0293 Modesto, CA 95356 Fax (209) 569-0293