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P •, <br /> �` <br /> ti <br /> c <br /> • ;� rhe <br /> Inc:. , E! <br /> ' '. <br /> Geological Audit Service o2s•1 ,nx( o )956-0700 — <br /> 1803 W.t.Aarch UVe,Su,te A•Slnckton.CA 9520, (now J5 <br /> 7 March 1992 <br /> iiauw <br /> (GeoAudit cV55-59E2-1.32) <br /> morMs. Linda Turkette+ EHS q <br /> Jaa uin County <br /> Public Health Services -- San <br /> Environmental Health <br /> tstivision <br /> 445 N. San Joaquin <br /> reet <br /> Stockton, California 95202 <br /> subject: Sitio Contamination Work Plan <br /> Escalon Packers, Inc' <br /> Avenue. <br /> Escalon, California <br /> 1905 McHenry <br /> Dear Ms. Turkette, uesting further <br /> We have reviewed your letter of 13 March referee ed address, cne <br /> ure 1. Mr. Scott Adrian of Escalon <br /> assessment of soil contamination at the len for the <br /> location of which is shown in 5 to prepare this work plan <br /> for for <br /> Packers, Inc. has authorized us p S, The drilling Permit <br /> base of work should still be in effect, and a copy of <br /> installation of additional soil boring <br /> the previous p <br /> that permit is attached. <br /> BACKGROUND 1992, when two <br /> Phase 1 of our investigation took place in January, samples were <br /> directional soil borings wereinstalledThe boringssol were drilled from <br /> collected for laboratory analy51s. the underground heating oil <br /> and the south side of the vault <br /> the access area on the noo�thbeY de of oot intervals at <br /> vault, and bottomed at were collected on 10-f feet in both <br /> (Figure 2) Soil samples 15, and 21 27 <br /> depths of approximately 7, roximately <br /> vertical p le was collected at app <br /> borings; an additional same <br /> Was detected in <br /> feet in SB-2. Diesel and or oil from thos at the17aand 15 foot leve s in <br /> all samples from SB-1 and dated 18 February 1992) ' Therefore, <br /> SB-2 (see GeoAudit report <br /> extent of contamination was <br /> either the lateral or <br /> delineated in SB-2, but neither was delineated in 5B- <br /> PROPOSED ASSESSMENT ofifour additional' <br /> rp oses to install a.,minimum.. Borings <br /> Geological �.udit p- p 'of;the 'vault. 2) . <br /> m the vault, <br /> soil borings around the perimeterat <br /> on the north side will' be lscandic Seethatthan <br /> contaminatQon exists re <br /> because the_previous boring <br /> ithin -3 feet-of the Vault e parallel <br /> the <br /> a depth of at-least-7- feet e ofawlarge underground pipeep will also Figure <br /> 2) . Due to the prose on that side <br /> south side of the vault, borings s will b ' vertical, <br /> approximately 5 feet from the vault. All. boring <br /> a oology'Geotechnical extent of eotechnical Services <br /> so.that; ontamination can.;l3e: determined ,in <br /> thev ;. <br /> Environmental Services l cY g <br />