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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 Rs orted In u /I <br /> Well ID Date Wellhead Depth to G W Benzene Toluene Ethyl Xylenes TPHg MTBE Fuel Dlssoved <br /> Elev Water Elev Benzenet(EPA8020) Oxygenates --Oxygen] <br /> Muni 10/29/91 NS NM NM <0 30 <0 30 <0 30 <0 30 <30 <br /> Well 12/03/92 NS NM NM <0 5 <0 5 <05 <05 <50 — - <br /> 03/29196 NS NM NM <05 <0 5 <05 <05 <50 — - <br /> 06128196 NS NM NM <0 5 <05 <0 5 <0 5 <50 - -- <br /> 10/04196 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 /> 03125l97 NS NM NM <0 50 <0 50 <0 50 <0 50 <50 — — <br /> 06/25/97 NS NM NM <0 5 <0 5 <0 5 <0 5 <50 — -- <br /> 09/18/97 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 /> 03/20/98 NS 1151* NS <05 <05 <05 <2 <50 <5 <MDLs <br /> 06/30198 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 /> 12/23/98 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 3u <0 00 <0 50 i <50 <[5 - <br /> 10/07/99 NS NM NS <0 500 <0 500 <0 500 1-:0 50o <50 0 — <br /> 12/28/99 NS NM NS <0$00 <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 0 -- <br /> 09/27/00 NS NM NS <0 5 <0 5 <0 5 <0 5 <50 <MDLs <br /> 12120100 NS NM NS <0 5 <0 5 <0 5 <0 5 <50 <5 0 - — <br /> 03129/01 NS NM NS <0 5 <05 <0 5 <0 5 <50 <5 0 -- — <br /> 06/18/01 NS NM NS <0 5 <0 5 <0 5 <0 5 <50 <5 0 -- <br /> 09/24/01 NS NM NS <0 5 <05 <0 5 <05 <50 <5 0 <br /> 01/15/02 NS NM NS <0 5 <0 5 <0 5 <1 0 <50 <5 0 -- <br /> 04/03/02 1 NS I NM N5 I <0 5 1 <05 1 <05 1 <1 0 <50 1 <5 0 <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/I = micrograms per liter or parts per billion <br /> < = not detected at or above Stated Method Detection Limit(MOL) <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 /> Ethytbenzene 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,DIPS, ETRE,and TAME See Laboratory Data Sheets for <br /> MDLs <br /> Dlssoved Oxygen by EPA Method 360 1 <br /> '*MTBE by EPA Method 8260 <br /> M <br /> 11 1.25821TABLES\TABLEGW vb 10/21/20021 <br />