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<br /> tNVIRONMENTAL SAMPLE CL�.� TI
<br /> Between y
<br /> Jana and May 1996# Augat implemented ars environmental sampling
<br /> i ro ram that included soil gas measurements beneath the facility, indoor air samples (to
<br /> x approximately assess worker exposures), subsurface soil sarra les collected 100 feet
<br /> south, east and west of the facility,and groundwater samples (AEI 1996a,AD 1996b,
<br /> AEI 1996c, AEI 1996d, AEI 1996e, Augat 1996). The groundwater samples were
<br /> collected from monitoring wells on the Augat property, on the power'line easement,
<br /> aloeSampson'saMill'and Simons Roads, and in residential wells on properties south of
<br /> Sampson's Mill Road. These samples were analyzed for volatile organic compounds
<br /> p ni
<br /> OCs} and, in the three wells closest to the facility, for polynuclear aromatic
<br /> hydrocarbons and totalp etroleum hydrocarbons T (AEI 1996a, AEI 1996b, Augat
<br /> 1996).
<br /> F SUMMARY of ENVIRONMENTAL SAMPLING
<br /> The soilgasmea measurements showed that the total organi
<br /> c vapor content in soil gas under
<br /> e central and south-centrad portions of the building was elevated no eherntic l specific
<br /> analyses Frerep rrmed (AEI 1996b). However, indoor air concentrations of TCE,
<br /> tetrachloroethene ( CE and vinyl chloride (the only compounds that were analyzed) in
<br /> the breathing spaces above this area were all detected but were below their respective
<br /> Permissible Exposure Levels for an eight hour work day set by OSHA. These are the
<br /> appropriate comparison values for an industrial
<br /> ndustri;al setting such as this facility.ty.
<br /> VOCs or TPH were not detected in any of the three subspace soil samples. These
<br /> samples were collected within 100 feet of the south, east and west sides of the facility.
<br /> Subsurface soil samples were not collected from beneath the facility. (AEI 19961)
<br /> Analysis of a total of groundwater samples taken from 6 rno itori wells (i.e.,, wells
<br /> y g
<br /> not used for drinking rater both on and off the Augat property revealed detections of
<br /> TCE, PCE, 171,I-trichloroethane 1,1,1-TCA), 1,1-dichioroethene 1,1-INCE), 1,1-
<br /> dichloroethane 1,1-DCA), toluene, xylenes, 1,1,2-trichloro-1,2,2-triluoroethane freon ,
<br /> o- lens benzene, chloromethane, and chloroform. TCE was detected in 20 of the
<br /> 87
<br /> samples the detected concentrations ranged from o.5 to 1000 ppb). The highest
<br /> concentration of WE was detected in a monitoring well at the intersection of Sampson s
<br /> Mill Road and Simons Road, adjacent to the residence on AP 62 Lot 241. PCE was
<br /> detected in 33 of the 87 samples (the detected concentration ranged from 0.5 to 150 ppb).
<br /> The sarnple with the highest PCE concentration, 150 ppb, was located approXimately 750
<br /> g
<br /> feet south of AP 62 Lot 2 4 1. I,1,1-TC , I,1- C E, l,1-DCA, toluene,xylenes, freon, o-
<br /> xylene,leve benzene chloromethane, and chloroform were detected at levels of less than 96,
<br /> 1 1-80.6 ori l. , and . ppb, respectively AE1 196a, AEI 19961, AEI
<br /> 1996c AEI 19964 AEI 1996e, Aug at 1996). Table 1a and 1b surruarie the sampling
<br /> data for the monitoring wells located on and o `f the Augat property, respectively.
<br /> G. SUMMARY OF SAMPLING FROM RESIDENTIAL WELLS
<br /> The discovery of TCE and PCE in monitoring wells located downgra client o f`the Augat
<br /> property raised concerns about the water quality in the private wells serving the 37 honne
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