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Advanced = ~� <br /> GeoEnvironmental, Inc. -- <br /> 16 February 1999 <br /> AGE-NC Project No.95-0114 <br /> Mr.Michael Infurna,Senior REHS <br /> San Joaquin County <br /> Public Health Services Environmental Health Division PHS-EHD MAR 1 1Q99 <br /> P.O.Box 388 <br /> Stockton,California 95201 <br /> Subject: Monitoring Well Installation And Assessment Workplan Addendum <br /> Hess Dubois Cleaners <br /> 348 West Harding Way,Stockton,California <br /> Dear Mr.Infuma: <br /> At your request Advanced GeoEnviromnental,Inc.(AGE)has prepared this Addendum to the 16 <br /> July 1998 work plan for additional soil and ground water investigation at the former Hess Dubois <br /> Cleaners located at 348 West Harding Way in Stockton.California. <br /> The scope of wort-initialiy included the installation of two ground water monitoring wells and two <br /> soil borings with soil and ground water sampling.If the vertical delineation of petroleum impacted <br /> soil is not completed with a sample collected from a 65 feet soil boring,based on field indications, <br /> the soil boring will be advanced an additional 20 feet in depth,to a maximum 85 feel bsg. Soil <br /> borings not to be completed as ground water monitoring wells will be completely sealed with grout. <br /> If soil or ground water contamination is evident at a depth of 65 feet or greater,than a depth discrete <br /> well will be established with an additional 8-inch soil boring.The well screen will be five feet in <br /> length.set at a proposed depth of 85 feet bsg and will meet the San Joaquin County well code.The <br /> location of a potential depth discrete well will be determined in the field, with PI S-EHD <br /> concurrence. <br /> If you have any questions or require further information,please contact our office at(209)467-1006. <br /> �rylw i3L1#4�i1J11`4 �rtii�lil� i <br /> sincerely, ENVIRONMENTAL HEALTH DIVISION <br /> Advanced GeoEnvironmental,Inc. 304 E. Weber Ave.Third FloorP.O. Box 388, Stockton,CA 95201-0388 <br /> Phone: (209)468-3420 <br /> William Little roves <br /> Staff Geologist <br /> cc: Mr.Peter Wallace 9zroved with changes: See Rernaft <br /> 4(9)5 1`unh U iiaur R'a%.Sux kiun.California 1)5205 El <br /> Disapproved: See Remarks <br /> 7cicphone{209 367-1(Xk FAX{209,467-1I I5 Remarks <br /> i>3tp 8y <br /> Approval of these plans extends only to that <br /> which is shown and desoPibed hereon bot <br /> d0@5 not authorize or approve any omission <br /> for deviation of requirernerlts of State laws or <br />