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90 <br /> 2h ', w-. �-._ro�'�3 � �� "�*-•" "rc5-mss.`�"1 �,: --�-�'��, ��Gc tw ��r�+.'`d`"'.�F.r'" �i ^�j'� <br /> s,;.:. �• w a'r. .. <br /> r <br /> ra ,�xEfvtE��^•elnrr PI AN <br /> Shell fla CeMy'Zny Stockton,Caliiornsa <br /> 520 V1'e s Charter NVay, <br /> —IN Delta Project No.40.85-W <br /> Page 15 <br /> ground water samples collected from rnonit°ring wells MW-1 through MW-9 - <br /> t Benzene concentrations in gr dlent to 20 p!�m in monitoring well <br /> ranged from nondetectable in monitoring well ltiW 6 (located uP trolcum product has been identitled <br /> MW-9(located in the area of the former pump islands)'.PF f'Q <br /> touted In,tlie area beneath the former,urderground <br /> an the water.:able sumface in man.tariag well MW 2, aad -q; o` ted 30 feet upgra dl r't=60 12 JI <br /> sto:nge taal�, and i°.ntanitoring v ''► re 38 illustrates the inferred <br /> dren and 85 feet down�dicat, reslnotively: gu <br /> t down ra ' t, ound water. <br /> Bp�Fi79ClYn&LLIy <br /> distnbution of free-phase petroleum product and the concentratiomss of dissolved benzene in Appendix D <br /> quarte sampling event are included in App <br /> V11 original laboratory data sheets from the October 1990 Q is Previous reports li-tAd its <br /> of this report pro Ous ground water quality data sheets were included <br /> t a Section 1.3. <br /> i ,• <br /> -3.5 Soll Va r FETA <br /> ctlon And Ground Water Pum !n Tet • Cst1at the <br /> {rduaCd'ti�or��rapnr extrasilon ati�grotand vvsi�P'�tt ` <br /> t 'ttrtd 21r19°hlT, me edial sys►em,and <br /> or <br /> desi <br /> .... <br /> The inform permitting <br /> obtained from thin.test was used f ethat willh1,re implemented at the site. <br /> .spy` proposed Tem <br /> will also!ie used in the pexmitttng of the remedial technologies <br /> i <br /> 3.5.1 Ground Water Pum in `Test i <br /> ' welt MW-7 was Pump for appr�mately 35 hours with a submersible pump in order to <br /> Monitoring r r foot of drawdown(gpml[t.).Thr <br /> - <br /> Monitoring <br /> rates. <br /> f 3 determine the s�.cific flow rate of water that the wztl would produ.e per # <br /> t� then pumped under the influence of a vacuum in order to compare <br /> the stabilized pumping .{ <br /> well was ndix.B of this report. <br /> l� <br /> A data summary of this initial pumping test is <br /> included in Appe <br /> a from 0.1 gall ri cser;raiiige(gpm)during <br /> ltt rata for the well W=q,,lo 1 reuuging tests an <br /> In general;ttalgllit pump B ..rm� .,�,- .iri:rtTite results a[ ttic pumping <br /> ltut in tits 0A gptq d:.rig rtu ►� ,1@ ly >_ ' roximatel 0:06 gpmift <br /> natural"p P 8 specific capacity <br /> of this well was app y <br /> rnottitoring well MW-7 show that time average spec' Appendix F of this <br /> i , Calculations for analysis of the pumping test results are presented in Appe <br /> I of dra <br /> report. <br /> i <br /> F.� <br /> Y <br /> { <br /> rx <br /> l <br />