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mmll "�„ •ma <br /> 6-11 <br /> F <br /> KLEINFELDER <br /> w <br /> 4 RESULTS <br /> 4.1 GROUNDWATER ELEVATIONS <br /> 73 feet below mean <br /> ground round water elevations beneath the site ranged from 25.39 to 25. <br /> low mean sea level on April <br /> sea level on February 21. 1991,and from 24.89 to 26.02 <br /> 6 Ozbelow feet emean ss a level ranged fron, <br /> 9, 1991. On April 19, 1991, ground water elevations round water <br /> 24.74 to 25.64 and on 3une 26, 1991, they ranged from 25. 59 to 2b.17. The g <br /> elevation for the February 21, April 9, 1991, and April 19, 1991, dates were contoured 6) o <br /> es 4 <br /> provide an estimated ground water grad ient and floow'd�re aonplotthe east-northeast on <br /> elevation contours indicate a local ground water fl <br /> -approximately 0.36 percent. ��.�.� <br /> February 21, 1991 with a hydraulic gradient <br /> r�o�f-app r p y� slihiler tao �tc�rist k' l <br /> ��e11:2Y�YS'�. ... 2«TCr�.d{s 'L.�u <br /> tidit�iCiring <br /> �} .d�Cviig"rddlsnt of:the tank.excavation:;MW,2 w lateral <br /> gracenTell, <br /> enerall� to ti <br /> 1� ou beast'=,� <br /> On April 9 and 19,,1991, the ground water llow dtrecttbn was g <br /> i T rr. r•.. ss.w <br /> . 1991. The gradient was 1.38 percent on April 9,and 1.1 <br /> s,.;- � .s� '��'"'�aii���Febrrt-ary•21;�' <br /> percent on April 19, 1991• <br /> r <br /> f <br /> 4.2 ANALY'T'ICAL RESULTS <br /> i <br /> M W r m le <br /> -21 <br /> On February 21, 1991,three water samples collected from monitoriag b11e by4GCC1FiDand <br /> and M`N-3 were analyzed for TPH pW <br /> .. urgeable as gasoline+TPH extractable <br /> benzene,toluene,ethyl benzene and xylene (ETEX)by <br /> EPA Method 602• Concentrations <br /> rom <br /> }� line and several of the BTEX compounds were detected iri sample collected Benzeof and <br /> of gas- <br /> the three ntortitoring wells. 13 000 u Gasoline rang1 and 360t o 2,400 ug,�1m 1,500 to 10,000 <br /> 0�spectively. The highest <br /> xylenes ranged from 820 to g/ while <br /> concentrations were consistently detected in the water sample collected ere ted in MW-2. <br /> ee' the lowest concentration was detected from MW-3• Toluene was only <br /> + . <br /> marized on Table 4. The Chain-Of- <br /> Analytical results for the water samples are sum <br /> i <br /> ratory data sheets are included ii►Appendix E <br /> Custody form and 13bo . <br /> g <br /> 18-91 b2 <br /> Copyright 1991 Kleinfelder, Inc. <br />