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2.0 .ESTIMATE OF QUANTITY AND COMPOSITION OF THE LIQUID LEAKED, INCLUDING BASIS OF ESTIMATE. THE RESPONSIBLE PARTY, MR. AND MRS.. HARRY10RZ DURING EXTENSIVE INTERVIEWS HAVE INDICATED-THAT THEY ARE COW INCED"'THAT LIQUIDS APPEAR IN THE SOIL AS A.-RESULT OF -OVERFILLING -OF THESE TWO TANKS .BY THE VENDORS OVER THE"Y_EARS - ESPECIALL-Y DURING THE SUMMER MONTHS WITH THE EXPANSION OF OVERFILLING. THE LAST :THREE YEARS THAT THE TAN}CS' WERE USED, THE OWNERS PARTICIPATED IN THE REQUIRED'MONITORING AND HAVE RETAINED THE MONITORING _ LOGS. NO NOTICEABLE LEAKAGE IS APPARENT FROM THE LOGS KEPT. THE 500 GALLON TANK WAS INSTALLED IN 1971. I`F- 1% WAS. LOST FOR 19 f YEARS; 19 YEARS X 5 GALLONS = 95 GALLONS. THE_350 GALLON TANK.WAS INSTALLED IN;1977. IF 1% PER YEAR WAS-LOST FOR 13 YEARS: 13 x 3.5 GALLONS = x+5.5 GALLONS. ` 45.-5 GALLONS. + 95 GALLONS =. 140.5 GALLONS + --:107. = 125 TO 154 .GALLONS AS THE TOTAL ESTIMATE LOST DURING .THE 19 AND 13 YEARS RESPECTIVELY. AN ESTIMATE IS THEREBY MADE THAT 150 GALLONS. MAY HAVE ESCAPED TO THE SOILS. ` 3.0 WORKPLAN TO DEFINE THE EXTENT OF SOIL CONTAMINATION INCLUDING ! SAMPLING METHODOLOGY.- FALCON ETHODOLOGYFALCON ENERGY PROPOSES TO RE-EXCAVATE .THE SITE OF APPROXIMATELY TWENTY-SEVEN (ZT) CUBIC YARDS OF DIRT ORIGINALLY EXCAVATED. FURTHER, FALCON ENERGY PROPOSES THAT -AN ADDITIONAL FOURFEET FROM THE BOTTOM AND AN ADDITIONAL ONE FOOT' OF THE- PERIMETER BE EXCAVATED_ THIS IS AN -ADDITIONAL APPROXIMATE FIFTEEN (15) CUBIC YARDS OF DIRT. THIS SOIL SHALL BE PLACED ON SEVEN (7) MIL PLASTIC; ON SITE, -PROXIMATE TO:THE EXCAVATION AND .COVERED WITH"THE SAME' PLASTIC ' UPON RECEIPT OF TEST RESULTS OFTHE SOILS FROM BC TESTING LABS, THE SOIL SHALL.BE AERATED ACCORDING TO THE -TERMS OF THE AERATION PERMIT RECEIVED FROM. SAN JOAQUIN COUNTY APCB. THE AERATION SHALL NOT BEGIN-UNTIL SOILS TESTS HAVE BEEN RECEIVED AND THE ENVIRONMENTAL HEALTH REHS OFFICER NOTIFIED. IMMEDIATELY AFTER THE .NEW EXCAVATION; IMPORTED CLEAN.-SOILS SHALL BE' USED TO-BACKFILL THE EXCAVATION. AS INDICATED IN THE- SITE HISTORY, NEW ' OWNERS HAVE TAKEN POSSESSION OF THE PROPERTY AND IT IS THE INTENT OF THE RESPONSIBLE PARTY TO INCONVENIENCE THEM AS LITTLE AS POSSIBLE. THE HISTORY OF -MONITORING LOGS AND LOW LEVELS OF CONTAMINATION DO NOT-JUSTIFY THE