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t""tui�t}tiLi� +L 1:5.ii,i�x+TY <br /> ENVIR,1rIENTAL HEALTH DIVISION <br /> 304 E.Weber Ave.Third Floor `. <br /> P.C. Box 388, Stockton,CA 95201-038.8 <br /> Phone: (209,418-3420 <br /> Approved <br /> 4pproved with changes: See Rernaft <br /> Disapproved: See Remarks <br /> Remarks <br /> �- Data BY <br /> April 18, 1999 .Apprdvai of these pians exteonly to that <br /> �V which is shown .and described hereon but <br /> c�11r Sti docs-lnot��; rize of approve any orn�f�sien <br /> or do ria; a IV Iremnnts of State taws or <br /> r a. . <br /> Mr. Michael Infuma, Sr. RENS L�' ;,�,g.��;�$�1J�L -:: <br /> San Joaquin County PHS <br /> Environmental Health Division <br /> P_O. Box 388 <br /> Stockton, CA 95201-0388 <br /> Re: Scope of work letter:Fortner Canteen Facility, 1500 Shaw Road, Stockton, CA; <br /> Site Code 1727,AES Project No. 145-94009-01 <br /> Dear Mr. Infuma <br /> This letter is to inform you of the future work Applied Earth Sciences,Inc. (AES)is <br /> proposing for the referenced site:AES is proposing to install two monitor wells and four soil <br /> borings. The first monitor well(MW-13D)will be installed to a total depth of 120 feet, and <br /> the second monitor well(MW-13)to a total depth of 46 feet. The four soil borings will be <br /> drilled to a maxnnum total depth of 120 feet each. The proposed locations of the wells are <br /> shown on Figure 1. The purpose of MW-13D is to continue to evaluate the soil and <br /> groundwater quality at depths of historically low groundwater levels(approximately 120 feet <br /> in 1978). Groundwater levels at this site have ranged from approximately 45 to 75 feet <br /> below surface grade since 1993. <br /> Soil samples will be collected at five-foot intervals during the monitor well and soil <br /> boring installations. The samples will be screened in the field for the presence of volatile <br /> organics using a PID meter. Field screening of samples will determine which soil samples <br /> collected will be submitted to a California Department of Health Services approved <br /> laboratory for analysis. As referenced in the September 25, 1997 memo published by the <br /> Public Health Services San Joaquin County Environmental Health Services the soil sampling <br /> parameters for MW 13-D will include Benzene, Toluene,Ethyl-Benzene, and Total Xylenes <br /> (BTEX)by EPA Method(8020);Total Petroleum Hydrocarbons Gasoline Range Organics <br /> (TPHg) by EPA Method (8015); Di-isopropyl Ether (RIPE), Ethyl-Tertiary Butyl Ether <br /> (ETBE),Methyl-Ternary Butyl Ether(MTBE),Tertiary-Amyl Methyl Ether(TAME), and <br /> Tertiary-Butanol by EPA Method 8260(Oxygenates);Methanol and Ethanol. All other soil <br /> samples will be anylyze for MTBE and BTEX by EPA Method 8020. Additional samples <br /> may be submitted to confirm positive results. <br /> Groundwater samples will be collected from the monitor wells and submitted to an <br /> appropriate California laboratory for analystes. The water sampling parameters will include <br /> BTEX(8021),TPHg(8015),and Oxygenates(8260)as referenced above. <br /> 2833 Trinity Square,Suite 149•Carrollton.Texas 75006•Tel:(972)416-7171•Fax:(972)416-7175 <br />