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TABLE 1 <br /> SUMMARY OF GROUNDWATER MONITORING AND ANALYTICAL RESULTS <br /> Gardner Property,Thornton,CA <br /> Page 7 of 7 <br /> (measured in feet MSL) (Reported in ug/1) <br /> Well 10 Date Wellhead I Depth tol G W Benzene Toluene Ethyl Xylenes TPHg MTBE Fuel Dissoved <br /> Elev Water Elev I I Benzene I(EPA 8020) Oxygenates Oxygen <br /> Muni 10/29/91 NS NM NM <0 30 <0 30 <0 30 <0 30 <30 --Well 12/03/92 NS NM NM <0 5 <0 5 <0 5 <0 5 <50 -- - -- <br /> 03/29/96 NS NM NM <0 5 <0 5 <0 5 <0 5 <50 -- -- -- <br /> 06/28/96 NS NM NM <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 10/04/96 NS NM NM <0 50 <0 50 <0 50 <0 50 <50 - -- -- <br /> 12/17/96 NS NM NM <0 5 <05 <0 5 <0 5 <50 -- <br /> 03/25/97 NS NM NM <0 50 <0 50 <0 50 <0 50 <50 -- -- <br /> 06/25/97 NS NM NM <0 5 <05 <0 5 <0 5 <50 -- <br /> 09/18/97 NS NM NM <0 5 <05 <0 5 <0 5 <50 -- <MDLs -- <br /> 12/16/97 NS 16 90* NS <0 5 <05 <0 5 <2 <50 -- -- -- <br /> 03/20/98 NS 11 51* NS <0 5 <0 5 <0 5 <2 <50 <5 <MDLs -- <br /> 06/30/98 NS 21 92* NS <0 50 <0 50 <0 50 <0 50 <50 -- <MDLs -- <br /> 09/29/98 NS NM NS <0 50 <0 50 <0 50 <0 50 <50 -- <br /> 12/23198 NS NM NS <0 50 <0 50 <0 50 <0 50 <50 <2 5 -- -- <br /> 04/05/99 NS NM NS <0 50 <0 50 <0 50 <0 50 <50 <5 -- <br /> 07/09/99 NS NM NS <0 50 <0 50 <0 50 <0 50 <50 <2 5 -- -- <br /> 10/07/99 NS NM NS <0 500 <0 500 <0 500 <0 500 <50 0 -- -- -- <br /> 12/28/99 NS NM NS <0 500 <0 500 <0 500 <0 500 <50 0 -- -- -- <br /> 03/21/00 NS NM NS <0 500 <0 500 <0 500 <0 500 <50 0 <2 5 -- -- <br /> 07/13/00 NS NM N5 I <0 500 1 <0 500 1 <0 500 1 <0 500 1 <50 0 1 -- <br /> Notes <br /> ft MSL = feet, Mean Sea Level, assuming ground surface datum is 10 feet above MSL(USGS 7 5 minute Thornton Quadrangle) <br /> ug/l = micrograms per liter or parts per billion <br /> < = not detected at or above Stated Method Detection Limit(MDL) <br /> -- = not sampled/not analyzed <br /> TPHg = Total Petroleum Hydrocarbons as gasoline analyzed by EPA Method 5030/8015 <br /> Benzene by EPA Method 8020 <br /> Toluene by EPA Method 8020 <br /> Ethylbenzene by EPA Method 8020 <br /> Total Xylenes by EPA Method 8020 <br /> Methy-t-butyl ether(MTBE)by EPA Method 8020 <br /> NM = Not Monitored <br /> NS = Not Surveyed <br /> * = measurement collected from top of sounding tube <br /> Fuel Oxygenates by EPA Method 8260 includes ethanol,t-butanol MTBE DIPE, ETBE and TAME See Laboratory Data Sheets for MDLs <br /> Dissoved Oxygen by EPA Method 3601 <br /> 18 <br /> W W5621TABLEskTablegw iog nmooci <br />