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63/13/2002 14 eO 2094683433 FIFTH FLOOR PAGE 02 <br /> 1 <br /> ' <br /> ViN ENVIRONMENTAL HEA LTH DEPARTMENT"AQ <br /> c - SAN JOAQUTN COUNTY <br /> A donna K-Hetan,RX[IS �, ,, Uw Super Lwn <br /> �` i <br /> F Director 304 East Weber Avenge, .i d f,oOr Carl Borgman,R E H$ <br /> ' Al Olsen,RE 11 S Stockton, Califorma 95202-2708 Mik°Huggm,R.E H S RD I <br /> Program Manager Telephone (209) 468-3420 Douglw W Wilson R E H S <br /> ' Laurne A Cotulla,RE H S Margaret Lagono,R F H'S <br /> Program Manager Fax (209) 464-0138 Robert McClellon,R E H S <br /> Mirk Barcellos,R E H S <br /> PAUL SUPPLE <br /> ATLANTIC RICHFIELD COMPANY <br /> P O BOX 6549 <br /> MORAGA CA 95470 <br /> ' RE ARCO Station##4932 Site Code #1136 <br /> 16 E Hardin Way <br /> Stockton CA 95204 <br /> WORK P1 AN Addendum to W011-Plan for Additiond Site Assesstuent and Feasibility Tes=8 dated Jan 15,2002- <br /> Daua <br /> March 11,2002 <br /> ' PREPARED BY SFCOR International Incorporated <br /> APPRO VF n_ x <br /> DiS�APPROYED. <br /> I7ENDUIv1 NFF77F17 � 5, � <br /> 'IADEQT1AT}?AND NF,._lESSA -ELENM'S OF THE WORK PLr1N [H8_S 25299 37,subd(c)(3)] <br /> Approved changes to tits onguW work plan are as follows <br /> ' 1 A total of two,rnsread of tutee,shallow groundwater rnonitortng wells will be installed offsite in the dourn- <br /> gmchent direction. <br /> 2 A total of two,instead of one,groundwater extraction,w4s will be installed The ozquQal woir$,plea <br /> proposed one extraction will orate 11c addendum adds another extraction yell offsite ,also,dje <br /> ' construction of tbcsc.wells has been changed from 4-inch diameter PVC screens to 6-inch diameter wire <br /> wrapped screens <br /> 3 The p=olect schedules have been modified to fit the deadlines set by SJC/EHD m their 02/14/02 litter <br /> ' CONDI ONS <br /> Onsite well in$tallatsons have been scheduled for March 14-15,2004 SJC/FjM well p=ut#0029071 has beea issued <br /> Offsite well inatallanons will take place as soon as City of SM&ton revocable and -icroad—tnt permits art obtained <br /> Enteron Mmcdiation measures of groundwater extrac-tton by pumpmg are to begin the week of�6,zch 18,2002,and will <br /> be expanded to include the offsite groundwater catraction well once it is installed The extraction events are expected to <br /> take place every two weeks <br /> 1 <br /> ' 3 {3 'Z. 13Y (►a i. - Ck <br /> I.Auti-Duncm Seni%RENS f,209 4f5 0337 <br /> cc Darty Hamcll,CVRWQCB <br /> ' Chat Hums,SECOR-by fax <br />