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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 u /1 <br /> Well ID Date Wellhead Depth to G W Benzene Toluene Ethyl Xylenes TPHg MTBE Fuef Dissoved <br /> Efev Water Elev Benzene EPA 8020 Oxvwenates Oxygen <br /> Mum 10129191 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 <05 <50 - <br /> 03/29/96 NS NM NM <0 5 <0 5 <0 5 <05 <50 <br /> 06/28/96 NS NM NM <0 5 <0 5 <0 5 <05 <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 <0 5 <0 5 <05 <50 - <br /> 03/25/97 NS NM NM <0 50 <0 50 <0 50 <0 50 <50 <br /> 06/25/97 NS NM NM <05 <0 5 <0 5 <0 5 <50 <br /> 09118/97 NS NM NM <0 5 <0 5 <0 5 <0 5 <50 <MDLs <br /> 12/16/97 NS 16 90' NS <0 5 <0 5 <0 5 <2 <50 -- <br /> 03120198 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 <050 <50 -- <MDLs <br /> 09/29/98 NS NM NS <0 50 <0 50 <0 50 <0 50 <50 -- <br /> 12/23/98 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 /> 10107/99 NS NM NS <0 500 <0 500 <0 500 <0 500 <50 0 -- - <br /> 12128/99 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 <25 <br /> • 07113/00 NS NM NS <0 500 <0 500 <0 500 <0 500 <50 0 <br /> 09/27/00 NS NM NS <br /> <0 5 <0 5 <05 <05 <50 <MDLs <br /> 12/20/00 NS NM NS <0 5 <0 5 <0 5 <05 <50 <50 - <br /> 03/29/01 NS NM NS <05 <0 5 <0 5 <0 5 <50 <50 <br /> 06/18101 NS NM NS <0 5 <0 5 <0 5 <0 5 <50 <5 0 - - <br /> <0 5 <0 5 <0 5 <0 5 <50 <5 0 <br /> 09!24!01 NS NM NS -- -- <br /> 01115/02 NS NM NS I <0 5 1 <05 1 <05 1 <10 1 <50 1 <5 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 unless noted <br /> NM = Not Monitored <br /> NS = Not Surveyed <br /> = measurement collected from top of sounding tube <br /> Fuel Oxygenates by EPA Method 8260 includes ethonol t butanol, MTBE DIPE, ETSE, and TAME See Laboratory Data Sheets for <br /> MDLs <br /> Dissoved Oxygen by EPA Method 360 1 <br /> MTBE by EPA Method 8260 <br /> 11 IUIK\TAKESITW.le (1124/02] <br />