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{ ..25 March 2002 ; <br /> AGE-NC Project No-'95-0106 „ <br /> Page 2 of 4 <br /> Temperature, pH and conductivity were .measured at, 0.5-gallon to 1.5-gallon intervals, as , <br /> r appropriate, using an Oakton water analyzer to' monitor stabilization of these ground water <br /> parameters;Field data logs are included in Appendix A.Purged water was-temporarily stored on-site <br /> in 55-gallon DOT-approved H-17 storage drums pending proper disposal: <br /> 3.2. COLLECTIONAND ANALYSIS OF GROUND WATER SAMPLES <br /> Water samples were collected from monitonng-wells MW-2 through MW-7 using new disposable <br /> bailers. The samples were transferred into 40-m1 EPA-approved vials containing 0:5 ml 18% <br /> hydrochloric acid as a preservative. The sample vials were then labeled with the monitoring well <br /> designation', date, timc,of sampling and the sampler's initials. The samples were transported in a <br /> chilled container under chain of custody'to McCampbell Analytical; Inc. (MAI), a California <br />!� De p.artment ofHealth Services DHS)-certified analytical laboratory for.analysis.The.samples were <br /> analyzed for: , <br />' Total petroleum hydrocarbons quantified. as gasoline, ' TPH- in accordance with <br /> EPA Method 8015 Modified,,and ; <br /> • Benzene, toluene, ethylbenzene, and total xylenes (BTEX) and methyl tertiary butyl ether <br /> (MTBE) in accordance with EPA Method 8020. <br /> 4.0. FINDINGS . <br /> Ground water elevation and flow direction'-were inferred from field data; hydrocarbon-impact to <br /> ground water was was'quantified by laboratory,analysis of the ground water..samples. <br /> 4.1."- . GROUND WATER ELEVATION AND FLOW,DIRECTION <br /> The relative-ground water elevation ranged from 33.08 feet to 33.72 feet, increasing an average.of, <br /> 0.64 feet since the November.2001 monitoring event. The water table appears as a north flowing <br /> ridge;the east limb'of the rid 'eflows toward the northeast at adient of approximately 0..007 ft/ft, > . <br /> g , g _ l� <br /> and the west limb flows toward the north-northwest.ata gradient of J proximately 0.006 ft/ft. <br />' Groundwater elevation data,is presented in�Table 1; the contoured ground water-elevation data is <br /> shown on Figure 3. <br /> Advanced Geo Environmental,Inc. <br />