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MAY. -.121S(MON)95(MON) 10:02 ALISTO ENGINEERING TEL-510 295 1823 P. 004 <br /> SCOPE OF WORK FOR TANK CLOSURE AND Co11O ANCE SAWUNG <br /> Tascu Narthwast Company Facility Na. 02474 <br /> 7647 Facifie Avenue <br /> Stockton, Cahfornia <br /> May 19, Ms <br /> IN WDUC ON <br /> `ibis proposed scope of work for tank closure and mrnphance sampling at Tosco Northwmt <br /> C=Vny Padlfty No. Q2479, 7647 Pacific Avenue,Stoc]doi't,Cahfiia will be t*n - m <br /> accordmwe with the San joaqurn County TWth Divmon and tl^te Caldon a <br /> Reg anal Water Quality Control Board. CcdrAl Valley Regia <br /> SCOPE OF WORK <br /> The proposed scope of work will consist of the Mowing task= <br /> Task 1; Observe oval Qf Und <br /> All field activities related to removal of eave unde=grohand fuel storage tanlz <br /> will be dammestted. Actvidw in be dom =bnd will indu&tank rixL fri <br /> wicdvadon of the back&l material, and loading/sech.tnaatent of lite mks for <br /> trarmpwt. <br /> The size,candiftary and Morita of the tanks;aautua of residue pumped f=nm <br /> the tooth~acrd dispamtxort, if applicable,amo=t of day ick placed=to each t=k, <br /> and lower explo nve Imine and percept oxW readmV as memured by tltie Fare <br /> Ueparbnent oe Cohmty inspector wM be recorded. <br /> Task 2 Qgect Com hance Sad S=gIM fu Tank Clazure <br /> One sod sample will be collected from baieatth each end of each tank m the <br /> Ch an cavity*from a depth of qTrM&MDdY 1 to 2 fft into the narive <br /> material. If gmundw,ater is encotmtered in dw cavity,soli samples wM be <br /> c*UeLted fraan the sidewalls of the escavatimi, and a grab water sample will be <br /> coUected. In addittiort,a soil sample will be collected along every 20 feet of <br /> product litre dimermm and below each dkper, a island <br /> The samples will be coUected directly knm the baddwe bucket by seraphig off <br /> the surface sail and hammering a dean stainless steel tttbe&recdy mto the sod <br /> ienieved. The saatphrhg tube will be fined with soil and the ends unmediately <br /> cavewd with TeRon sheetmg or aLummum foil and poipvmyl chloride caps arhd <br /> sealed with tape to zwm am air tghmm& After sealing,the samples will be <br /> Libelled and iranndiately plamd into an iced conies and stared at a maximum of <br /> B%WM%?aoasS+su�r0 1 <br /> 90 'a LOD EZa 00Z 'ON XVj (UI INVM SSI�X] ANOd M60 NOW 96-ZZ-AVN <br />