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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 /I <br /> Well l0 Date Wellhead Depth to G W Benzene Toluene Ethyl Xylenes TPHg MTBE Fuel Dissoved <br /> Elev Water Elev Benzene EPA 8020 Ox enates Oxygen <br /> Muni 10/29191 NS NM NM <0 30 <0 30 <0 30 <0 30 <30 <br /> Well 12/03/92 NS NM NM <05 <05 <0 5 <05 <50 — - <br /> 03/29196 NS NM NM <05 <0 5 <05 <05 <50 — - <br /> 06/28/96 NS NM NM <05 <05 <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 <05 <05 <0 5 <50 -- — <br /> 03/25/97 NS NM NM <0 50 <0 50 <0 50 <0 50 <50 — <br /> 06/25197 NS NM NAA <05 <05 <0 5 <05 <50 - <br /> 09/18/97 NS NM NM <0 5 <0 5 <0 5 <05 <50 — <MDLs <br /> 12116/97 NS 16 90' NS <0 5 <0 5 <0 5 <2 <50 — <br /> 03120198 NS 1151' NS <br /> <0 5 <0 5 <0 5 <2 <50 <5 <MDLs <br /> 06/30/98 NS 21 92' NS <050 <0 50 <0 50 <0 50 <50 — _ <MDLs <br /> 09/29/98 NS NM NS <0 50 <050 <0 50 <0 50 <50 — - <br /> 12/23198 NS NM NS <050 <050 <0 50 <050 <50 <25 <br /> 04/05/99 NS NM NS <0 50 <050 <0 50 <0 50 <50 <5 <br /> 07/09/99 NS NM NS <0 50 <0 50 <0 50 <0 50 <50 <25 <br /> 10/07/99 NS NM NS <0 500 <0 500 <0 500 <0 500 <50 0 -- <br /> 12/26/99 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 NS <0 500 <0 500 <0 500 <0 500 <50 D <br /> 09127100 NS NM NS <0 5 <05 <0 5 <05 <50 — <MDLs - <br /> 12/20100 NS NM NS <0 5 <05 <0 5 <0 5 <50 <50 - <br /> 03/29/01 NS NM NS <0 5 <05 <0 5 <05 <50 <50 — <br /> 06/18/01 NS NM NS <0 5 <05 <0 5 <0 5 <50 <5 0 <br /> 09124/01 NS NM NS <0 5 <0 5 <0 5 <05 <50 <5 0 - <br /> 01/15/02 NS NM NS <05 05 <0 5 <10 <50 <5 0 - <br /> 04/03/02 NS NM N5 1 <05 1 <05 1 <05 I <10 I <50 1 <50 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/1 = 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 ETBE and TAME See Laboratory Data Sheets for <br /> MDLs <br /> Dissoved Oxygen by EPA Method 360 1 <br /> MTBE by EPA Method 8260 <br /> W�62582%TA8LES%TABLEGW a%[8121120021 <br />