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A4/24/98 10:27 0&1916""445633 HLA SACRAMENTO Z002 <br /> Harding Lawson Associates <br /> April 24, 1998 <br /> 40344.01 <br /> Margaret Lagorlo, Supervising REHS <br /> San Joaquin County public Health Services <br /> Environmental Hoalth Division <br /> 304 East Weber Avenue <br /> Stockton, California 95202 <br /> Work Plan Addendum, Change of Driller, acrd <br /> vt*fication of Drilling Date for <br /> Limited Phase II Investigation <br /> Courtyard Tanks and Sump at Newark Paperboard Mills <br /> 800 West Church Street, Stockton, California <br /> Site Code 1063 <br /> Dear Ms. Lagorio: <br /> On behalf of Newark Siurra Paperboard Corp. (Newark-Sierra). Harding Lawson Associates (H1,A) submits <br /> this work plan adden.durn, notification of:a. change ire di-illing subcorita-actor and schaduled drillinig date <br /> for a limitod.phase 11 investiga'(ion at the above re-ferenced site. H.LA's Werk Plan, C-curtyard Tanks and <br /> Sump, Newark Paperboard r'v1;11s. 8001 vVest Church Str-et, Slo:ktnn California was submitted to the San <br /> Joaquin County Public Healtl) Services, Environmental fttaaith Divisicua (PHS,/EHD)' in.response to the <br /> PHS/E11D letter dated Seplenmber .10, 1997 requiring a.work plan for additional investiagtion al t-he above <br /> site. HLA's work plan was approved by PRS/El-ID in a letter to Newark.-Sierra.dated January 5, 1998. <br /> At your request, HLA is notiNIM8 PHS,.T. 11-s of a change in riri.11ing subcontractor from Gregg Drilling to PC <br /> Exploration of Roseville California, a G�tlii:rlr.r a licem;setl. C-57 driller(14cersa # 26556). The rig is a <br /> confined-space auger rig and.solid or hollow-stem.:augers will be used. Samples will becollected at <br /> miIlimum ilve foot intervals for lii11.Ologic description rand poterntial Laboratory analysis. Atiacbed is a <br /> copy of an authorization letter to sign drilling 1_erwits for PC Exploration. <br /> The field work is scheduled for Aptil 2119 1.997, drilling will begin as early as 8:30 to 9:00 AM. A grout <br /> inspection is being,requested for;he aftHrnoon and 1 vrill conrc.ii..aio with you during,the AM as to the <br /> exact time grouting ivill c:onimoiji3e. Your ongoing cooperation on this project is greatly appreciated by <br /> HLA and Newark-Sierra. if there are arty questions,please do not hasitate to call. <br /> Yours very truly, <br /> HARDING LAWSO.N ASSOCIATES <br /> G W- -aArk <br /> Gary Haeck,Ph.D.,R.G. <br /> Project Geologist <br /> Enclosures- Well drillers authorization letter <br /> GDF/GLF/dp/G:\"T\GDKGH40344P.339 <br /> Engineering and <br /> Environmentai Services 1C265 Rockingham Drive,Suite 150,Sacramento,CA 9ZB27 916/364-0793 Fax:(916)364-56303 <br />