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•,' QSY1812000 10:23 2094671118 AGE STOCKTON PAGE t12 i{ f <br /> U Ill <br /> Advanced _ `Z <br /> .GeoEnvironmental, Inc. <br /> 18 August 2000 N <br /> a <br /> AGE-NC Project Na. 98-0511 <br /> Mr. Richard Williams <br /> City of Lathrop-Public Works Department E <br /> 16775 Howland Road <br /> Lathrop,California 95330 <br /> Subject: Anticipated Duration of Off-Site Monitoring Wells <br /> LANGSTON'S MARKET <br /> 15615 Smith 7t°Street,Lathrop, California <br /> i E <br /> Dear Mr.Williams- <br /> At the request of Mr- James Langston, Advanced GeoEnvironmental, Inc. (AGE) has the following <br /> information for your consideration for the request of the performance bond: <br /> • The San Joaquin County Public Health Services-Environmental health Division(PIIS-ERD) is <br /> requiring additional investigation south and southwest of the former UST excavation. AGE has <br /> proposed the installation,of two grotard water monitoring wells utilized for the lateral definition of { <br /> hydrocarbon-impact and MTBE-impact to ground water Msociated with the unauthorned release of I <br /> petroleum hydrocarbons from former Underground Storage Tanks(USTs)at the site. <br /> • If ground water monitoring wells are utilized for plume definition,AGE anticipates a duration of <br /> approximately 12 to 24 months. <br /> • In the very unlikely event that ground water remediation is necessary AGE anticipates an <br /> approximate 36 to 48 month duration for the wells. <br /> Upon completion of the assessment/remediaticn, all wells will be abandoned in accordance with l . <br /> • PHS-EHD guidelines. <br /> If you have any questions or comments,please contact our of6.ce at(209)467-1006. <br /> Sincerely, { <br /> Advanced GeoEnvironmental,Inc. <br /> Tony Mikacich <br /> Staff Geologist <br />! <br /> CC: Mr.James Langston <br /> Mr. Terry Hamilton,Semco !. <br /> Mr. Michael Infurna.,PHS-EHD <br /> 4005 North Wilson Way,Stockton.California 95205 <br /> Telephone(209)467-MM FAX(209)467-1119 ` <br /> I <br /> 1 <br />