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TABLE 1 <br /> R, 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 A) <br /> Well 10 1 Date Wellhead Depth to G W Benzene Toluene Ethyl Xylenes TPHO MTBE Fuel Dissoved <br /> Elev Water Elev Benzene (EPA 8020) Oxygenates O en <br /> Muni 10129/91 NS NM NM <0 30 <0 30 <0 30 <0 30 <30 — —Well 12/03/92 NS NM NM <0 5 <O 5 <0 5 <0 5 <50 — — <br /> 03/29/96 NS NM NM <0 5 <O 5 <0 5 <0 5 <50 — — <br /> 06128/96 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 /> 12117/96 NS NM NM <0 5 <0 5 <0 5 <0 5 <50 -- — <br /> 03/25197 NS NM NM <0 50 <0 50 <0 50 <0 50 <50 — — <br /> 08/25/97 NS NM NM <0 5 <0 5 40 5 <0 5 <50 — — <br /> 09/18/97 NS NM NM <0 5 <0 5 <0 5 <0 5 <50 -- <MDL9 <br /> 12/16197 NS 18 90' NS <0 5 <0 5 <0 5 <2 <50 — — <br /> 03120/98 NS 1151* NS <0 5 405 <05 <2 <50 <5 <MDLs <br /> 06130/98 NS 2192* NS <0 50 <0 50 <0 50 <0 50 <50 — <MDLs <br /> 08/29/98 NS NM NS -CO 50 <0 50 <0 50 <0 50 <50 — — <br /> 12/23/98 NS NM NS -CO 50 <0 50 <0 50 <0 50 <50 <25 — <br /> 04A]5/99 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 40 500 <0 500 <0 500 <50 0 — — <br /> 12r2W99 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 y ±Y <br /> 07/13100 NS NM NS <0 500 <0 500 <0 500 <0 500 <50 0 <br /> 09017100 NS NM NS <0 5 <0 5 <0 5 <0 5 <50 — <MDLs — <br /> 12/20/00 NS NM NS <0 5 <0 5 <0 5 <0 5 <50 <5 0 -- — <br /> 03/2MI NS NM NS <0 5 <0 5 <0 5 <0 5 <50 <5 0 — — <br /> 06/18/01 1 NS NM I NS <05 I <05 I <0 5 <05 <50 <5 0 — — <br /> Notes <br /> ft MSL = feet Mean Sea Level,assuming ground surface datum is 10 feet above MSL(USGS 7 5 rrunute Thornton Quadrangle) <br /> ugA = rnicrograms per liter or parts per billion <br /> < = not detected at or above Stated Method Detection Limit{MDL} <br /> -- = not sarnpled/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 8280 Includes ethonol t-butanol MTBE DIPE ETBE and TAME See Laboratory Data Sheets for <br /> MDLs <br /> Dissoved Oxygen by EPA Method 360 1 j <br /> "MTBE by EPA Method 8260 <br /> W-16]60tIT.elEg7�i.yv 19µ/4o011 <br />