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.s A S S O C I A T E S I N C "a L� Monitoring well MW I was purged a minimum of three well volumes and until the electrical conductivity, pH, and temperature of the water stabilized Subsequent to purging, groundwater was sampled and transferred to appropriate sample containers, using a clean, disposable bailer with a bottom-emptying device to reduce volatilization Sample containers were then labeled with sample Identification, placed on ice, and shipped under chain-of-custody to Sequoia Analytical Field development/purge logs are presented in Attachment 1 Laboratory Analysis The groundwater sample from well MW 1 was analyzed by Argon Laboratories for total petroleum hydrocarbons as gasoline (TPHg), benzene, toluene, ethylbenzene, and xylenes (BTEX), by EPA Method 801518020, and oxygenate fuel additives by EPA method 8260 Laboratory Results No petroleum hydrocarbon constituents were detected Analytical results are summarized in Table 2 Laboratory data sheets and chain-of custody documentation are provided in Attachment 2 iOTHER ACTIVITIES The Marley Cooling Tower Company (MCTC), located directly east and adjacent to Franklin High School, is currently conducting corrective action measures to address soil and groundwater impacted with chromium Two groundwater monitoring wells associated with the MCTC corrective action measures, MW-208 and MW-320, are located approximately 70 feet southeast of the subject site's former USTs According to the MCTC subsurface investigation, three hydrostratigraphic units underlie the MCTC site and the direction of groundwater flow is to the south Well MW-208 is screened in the shallow zone (40-80' bgs) and well MW-320 is screened in the intermediate zone (120-180' bgs) At the request of ATC, wells MW-208 and MW-320 were purged and sampled on October 16, 2000 The groundwater samples were relinquished to ATC Associates and were analyzed by Argon Laboratories for TPHg and BTEX by EPA Method 8015/8020 and for MTBE, 1,2- dibromoethane (EDB), 1,2,-dichloroethane (1,2-DCA), tertiary amyl ether (TAME), di-isopropyl ether(RIPE), ethyl tertiary butyl ether (ETBE), and tertiary butyl alcohol (TBA) by EPA Method 8260 No petroleum hydrocarbon constituents were detected in the groundwater samples collected from �7 MCTC wells MW-208 and MW-320 Laboratory data sheets and chain-of-custody documentation are provided in Attachment 3 • WORKPLAN FOR ADDITIONAL SUBSURFACE INVESTIGATION w Iwordpmo 17292117292 011ReporUW qmr 2000 doe 2