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r i <br /> t � <br /> DEL MONTE 171SW�SiU� ' J <br /> -110 FILBERT ST <br /> STOCKTON CA \ 2-3 <br /> GENERAL CONCEPTS 4 <br /> PLUME LENGTH 500' PLUS'N TO S <br /> j <br /> PLUME WIDTH 300'PLUS W TO E <br /> ,WELL SURVEY INDICATES'I1MANY WELLS WITHIN i MILE OF SITE (775 FEET NE OF F <br /> STREET) <br /> i <br /> SOIL PLUME 20 TO 50 THICK FOR THE MOST PART UNDEFINED <br /> TABLE IN ug/1 <br /> MW TPHG BENZ TOL E-BENZ XYLENE LEAD <br /> .1 HIGH 1.4 MIL 64000 110000 21000 130000 307 7-93 <br /> I CURRENT 3140 934 24 18 62 ?? 8-96 j <br /> 2 HIGH 98000 9200 14000 1800 18600 17.7 10-95 <br /> 2 CURRENT 3700 40 14 50 210 ?? 8-96 <br /> 3 HIGH 2800 100 410 72 620 6.9 7-91 <br /> 3 CURRENT ND ND ND ND ND ? 8-96 <br /> NP 1-70' 125130 1`0680 23925 2165 16430 ? 8-96 <br /> NP 1-90' 199000 25800 38600 5200 26400 ? 7-95 <br /> NP 2-65' 50350 3350 4550 <150 12305 ? 8-96 <br /> POTENTI�L DIRECTIVES'; <br /> • MW's OVER SCREEN: DILUTION EFFECT OBSERVED SINCE 10-18-95(GW•45')RP's <br /> SHALL INSTALL NEW WELLS <br /> • DEFINE GW PLUME:DOWN AND CROSS GRADIENT NOT DEFINED NOR IS VERTICAL <br /> ASPECT <br /> • PROVIDE CROSS SECTIONS:PRIOR TO ANY ADDITIONAL WORK INCLUDES NEW MW's <br /> • WHEN INSTALLING NEXT MW's CONTINUOUS CORES(CC's)REQUIRED <br /> ;o CC SAMPLES TO BE ANALYZED FOR GEOTECH:PERM.,POROS.,DBD.,MOIST.FOR <br /> EACH SIGNIFICANTLY(DIFFERENT LITHOLOGICAL UNIT <br /> ,• ITB TO BE SUSPENDED'GIVEN THE FOLLOWING: <br /> I GW LEVELS RISING IE <br /> 2 NEW WELL SCREENS'MUST BE INSTALLED <br /> 3 SVE SHORT CIRCUIT&OVER SCREEN <br /> 4 SELECTION OF RA IS',PREMATURE RECOGNIZING THE PLUME IS NOT DEFINED <br /> 5 HR AND GW DEGRADATION UNCERTAIN <br /> 6 ITB IN CORE NEAR NP-1,2 UNLIKELY TO BE EFFECTIVE GIVEN CURRENT FHC,CONC. <br /> I <br /> 3 <br />