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i <br /> • 2 JULY 2000 GROUNDWATER MONITORING <br /> ' P procedures this <br /> Philip's groundwater monitoring p sand findings are contained in s <br /> section <br /> 2.1 Groundwater Monitoring Procedures <br /> ' A Philip geologist performed groundwater monitoring on July 2, 2000 <br /> Groundwater samples were collected from monitoring wells MWA, MW-4, <br /> MW-9, MW-10, MW-12, and MW-13 as directed by Ms Carol Oz with the <br /> PHS/EHD Groundwater samples were also collected from sparge wells SPA <br /> and SP-2, and from piezometers PZ-1 and PZ-2 <br /> Prior to sample collection, Philip's geologist measured groundwater levels in <br /> these wells, and the potential presence of free phase gasoline product with an <br /> 1 electronic oil/water interface probe Free phase gasoline product has never <br /> been observed in any well <br /> Philip's geologist purged a minimum of three well volumes of groundwater <br /> from each well into 55-gallon drums using a downhole pump and clean, <br /> dedicated tubing Field parameters pH, temperature, and electrical <br /> conductivity were monitored for stability The 55-gallon drums were <br /> temporarily stored on-site, then removed and transported to Philip's licensed, <br /> California waste disposal facility <br /> Groundwater samples were collected with clean, disposable bailers, and <br /> transferred into clean laboratory-provided containers Sample containers were <br />' sealed, labeled, and stored on ice for subsequent delivery to the analytical <br /> laboratory <br />' Samples were delivered, with chain-of-custody control, to Acculabs Inc in <br /> Davis California Samples were analyzed for benzene, toluene, ethylbenzene, <br /> xylenes (BTEX), and total petroleum hydrocarbons as gasoline (TPH-G)using <br />' EPA Method 602/8015(modified) These samples were also analyzed for <br /> oxygenate compounds TBA, MTBE, DIPE, ETBE, and TAME using EPA <br /> Method 8260 <br /> 7 <br /> July 2000 <br /> Groundwater Monitoring Report <br /> The Earthgralns Company <br /> 2651 South Airport Way <br /> Stockton,Callforma <br /> Prepared for THE EARTHGRAINS COMPANY Prepared by Philip Services Corp <br /> H\ENW2400132\121382EGlSoockt=\Sk ckwn10700mon dot August 14,2000 <br />