ARCHIVED REPORTS XR0012687 - Laserfiche WebLink

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- y - r<� f i 4 ANALYTICAL RESULTS c: I A total of four soil samples and one water sample were submitted to California Water Laboratory for analysis. Table 1 provides the specific analyses conducted by the laboratory on each sample and the respective EPA methodologies. Table 2 presents a summary of Complete analytical reports including chain-of- Complete most significant analytical results. custody records are presented in Appendix 2. ' Total petroleum hydrocarbons, BTXE and chlorinated hydrocarbon analyses conducted on soil samples from the north, east and west walls of the excavation, detected no constituent concentrations. The samples collected from the north and east wall contain measurable levels of oil and grease but at concentrations of. 20 to 100 times below those found in the sample collected from the visibly stained area in the south wall. In addition to high + concentrati�sns of oil and grease. the sample from the south wall also included detectable c� levels of xylene and&thylbenzene but at concentrations below the State Action Levels. Na i chlorinated hydrocarbon compounds were found in the soil samples. Two chlorinated compounds, dichloroethane and trichloroethane were found above W detection limits in the groundwater along with minor concentrations of toluene and xylene. '. .' All constituents found in the water sample were below their respective State Action Levels or EPA mandated Maximum Contaminant Levels (MCL). The concentration of 1,1,1 �. trichloroethane for example at 7.6 ug/L is more than 20 times below the Primary Drinking Water Standard or MCL for this constituents {200 u,/L} as listed in Title 22, Division 4, Chapter 15 of the California Code of Regulations "Domestic Water Quality and - ,` Monitoring." The MCL is the limiting value suggested for protecting beneficial uses of L water.