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ENVIRONMENTAL HEALTH DIVI�1614 Post-ho Fax Note 7671 DatePages► �j <br /> 304 E.Weber Ave. Third Floor To AjItZA From <br /> P. O. Box 388,Stockton CA 95201-0388 <br /> Approved Co./Dept. Co. <br /> Denied 171 Phone# Phone# <br /> Conditions 5o= 156 <br /> Fax# Fax It <br /> Date , W- '1 by <br /> 93 <br /> Imr Geologica!?echnics Inc. <br /> ( CLr VYYI�'R�� n �jC�iTl(Sl'J zrit tmxad j <br /> :NMrm.CNJomia 91353 <br /> IYP9/531diZL1•SMfd56fP 1 <br /> 1 FIIA1�Int� (1� � <br /> tQ Wlonitt LAja"- Addendum to Work Plan For <br /> �y�yyvFU UG7 �O1lG�yl1�Z� Additional Site Characterization 1 <br /> U AQ 1 L t_ <br /> ri 0 t�[ (I�1 c&B Equipment <br /> / �1/1?�t1�L�Z / Il <br /> 74West 11th Street <br /> tJt-f�i� l� � Tracy, <br /> acy,California I <br /> Project No.336.2 <br /> April 7,1997 <br /> �yv�Try�� W yt-� 1.0 ADDITIONAL SITE CHARACTERIZATION I <br /> �1rJ1�I bu 1"" ' •r 11v 1'v On behalf of C & 13 Equipment Geological Technics Inc. responds to the San Joaquin <br /> County Public Health Service June 4, 1996 correspondence and subsequent conversations <br /> or— with Mr. Ron Rowe directing that a work plan to further investigate the extent of <br /> ...amination. It is the intention of this Work Plan Addendum to propose techniques and <br /> C��•(�',,rrnyy,, , methodology that will offer site specific data in order to better qualify the rrsk a[this site. <br /> s ���-r' b6l�(1(o Gw,�et,%, To further investigate the extent of gasoline range petroleum hydrocmbons in the <br /> �.�t, L,�,,,"I11"r".,/� ��/ rundwater,Geological Technics Inc.proposes to: <br /> W W`C('-"v (r f PA • Drill 5 soil borings,to be completed as monitoring wells,and co�IYQllect soil samples from <br /> Pre "e Q� each. <br /> � ,y Pascwnab . <br /> W1N7 � Test selected soil samples for geotechnical parameters m evaluate fate and transport <br /> 2 .5j?�rN L-C considerations. <br /> t l . Install four shallow groundwater monitoring wells screened across the water table in the <br /> ( ��.v.fj down gradient and cross gradient directions. <br /> w/, P P �Lfa'C� •b Install one deeper screened groundwater monitoring well in an effort to complete vertical <br /> } �O (�- extent of groundwater contamination. <br /> A • Continue routine groundwater monitoring that will include measuring additional <br /> parameters to evaluate the plume stability. <br /> . Perform a receptor survey to include identifying all wells in a 1000 ft radius and <br /> evaluating their construction,use,and pumping history. <br /> .3 - ( %6ftft n The results of the investigation to due are smvtnmized in this document(Summary Tables- <br /> Appendix.A). All of the dam will be integrated and reported together once this proposed <br /> be5p v)elLt, l,Url515U1�1IM> scope of work has been completed. <br /> ' <br /> AuaA) strl� G"L"S6VL4 <br /> YO om-f� <br /> . Da I3T <br /> Polp;lvrow" &o -45 Poral cj <br /> uw cv" kJ tn4- TIII"A-L, atA �n <br /> STi1�EE7�� twTt,P��fk— lot'l ClJYL� O� 1� p If,GI,/• <br /> `i, VVITP�� 12.21�L Sc-('oULi� �RoE <br /> Pd 0,3 ,,II06)L , <br />