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41 <br /> Table 1. Groundwater Monitoring Well Data, con't. <br /> Well No Date Well Depth to Casing Water Floating <br /> Depth (ft) Water (ft) Elev (ft) Elev (ft) Product <br /> MW-4 8/20/97 i 8 47 973 4760 3787 None <br /> MW-4 12/10/97 18 47 926 ----- 38 34 None <br /> MW-4 3/31 /98 18 18 8 61 ----- 38 99 None <br /> MW-4 6/30/48 18 18 898 ----- 38 62 None <br /> MW-4 9/29/98 1783 974 ----- 37 86 None <br /> MW-4 12/29/98 17 83 933 ----- 38 27 None <br /> MW-4 3/29199 17 93 915 ----- 38 45 None <br /> MW-4 6130199 17 65 992 ----- 37 68 None <br /> Groundwater Gradient <br /> Groundwater elevations were plotted to a known datum to prepare a groundwater contour map <br /> The groundwater flow direction was toward the north-northeast at sampling time, and a flow <br /> gradient of 0 032 was calculated Water levels have declined slightly, and this is attributed to <br /> normal aquifer discharge Historically observed groundwater flow trends consistently vary <br /> from north-northeasterly to north-northwesterly <br /> Chemical Analysis and Results <br /> • The samples were transported to Chromalab, Inc in Pleasanton, CA The groundwater samples <br /> were analyzed using EPA Methods 50301 8015 and 602 for Total Petroleum Hydrocarbons as <br /> Gasoline (TPHG), Benzene, Toluene, Ethylbenzene and Xylene (BTEX) and fuel oxygenates <br /> including Methyl-tert-butyl-ether (MTBE) and Volatile Organic Compounds (VOC) by EPA <br /> Method 8260 The analytical reports are attached, and the results are listed below in Table 2 <br /> (see Table 3 for historic data) <br /> Table 2 Groundwater Chemical Data <br /> Well No Date TPHG" Benzene Toluene Ethylbenz Xylene Fuel Ox VOC <br /> --------------------------------- ug/l -------------------------------- <br /> MW-1 -------- No Data - Monitoring Well Destroyed, June, 1999 <br /> MW-2 6130199 ND ND ND ND ND ND Yes <br /> MW-3 6130/99 ND ND ND ND ND ND ND <br /> MW-4 6130199 ND ND ND ND ND ND ND <br /> Blank 6/30/99 ND ND ND ND ND ND ND <br /> ND - None detected NA - Not Analyzed ug/I - micrograms per liter <br /> Fuel Ox - Fuel oxygenates including MTBE by Method 8260 <br /> 1,2-Dichloroethane ND for all wells for 3129/99 sampling Yes - See text below <br /> Page 3 <br />