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ENVIRONMENTAL HEALTH bEFARTMENT <br /> P�U�N <br /> SAN JC AQUIN COUNTY <br /> 1 2� bonne K:�le�an,IR:E.IirS. �, Prrlgram Coardinatvrs <br /> i Director 0 East Weber Avenue,Third Floor Carl Borgman, R,E.H.S <br /> Laurie A.cotults,R.E.H,Sr Stockton,California 95202-2708 Make Huggins,R.E.H S,'k.13J. ' <br /> tie Assistant Direetar Margaret Lagorio,R.E.A.S, j <br /> r i7' N Ale � Tele hone: 209 468-3424 Robert McClellon,R.E.x:s. <br /> Fax-(209)464-013$ k Jeff�Carruesco, R.E.H.S. <br /> A Website:www.sjgov org/ehcll.. Kasey Foley,R E:H:s. <br /> .. f <br /> VGC.2.4 2006. <br /> ++�i`a��.�:td.���tiy;���}�!����S.-J.13 <br /> str.. <br /> 3304. <br /> g. • `!..•.v, y J, a .:e v M. ( y�. }' J, .. <br /> RE; xJc�e's•Place . : ' ' '��:.�� � � � �>M :�.. � � �,, rt SITE CODE: .231686 s ` <br /> '156at�g Harlah..Road...x.,. . <br /> j Lathrop,-. a <br /> San Joaquin GO nty'Environmentai Health Department (EHD) has reviewed the <br /> "Additional Groundwater'Assessment Worts Plan" (work plan)dated December 8- <br /> 2tJ06,_prepared;by -nvironrnental remediation Group for the above referenced _ <br /> site. &D approves the following parts of the work plan as adequate.and rte+ <br /> necessary pursuant to the California Health and'Safety Dade Section 25296.10 <br /> 1. Installation:of.a=monitoring well (MW) in the area of`MW8-and MW9 that <br /> has a screened interval in Sand C (started,around 64 feet below surface <br /> grade(bsg)in CPT8 that was placed in this area).:"` <br /> 2 Installation of two separate monitoring`wells (clustered)northwest of <br /> MWO-1X and MW2:°Otic monitoring well to be screened from 5 to 25 <br /> feet bsg since J1lIVtiWO-Mand:MW2 both have well screen-at 20 fleet bsg <br /> and CPT1,°2 avid 3 all show fine grain material at 25 feet. The second <br /> monitoring well will.have a.scre.en;interval in Sand C (started around 65 <br /> .feet bsg in CPT3) ` a t x t <br /> 3.. :Installation of-two separate monitoring wells on Chandra Way northeast of: <br /> MW1 1 6.. 'Otte nrtontoring well to be screened lir Sand A that started around <br /> 5.feet bsg in C.PTS (screen'int tvaI and length to be based on lithology). <br /> b. The second monitoring well will':'have,a screen interval in Sand B that: <br /> started around27 feet bsg in CPT5 (screen interval'and length to be .,,vr. :� <br /> based.on.lithology)r. <br /> 4. Ilstalfation of.two separate monitoring.-wells northwesterly of MIIVQB: One <br /> monitoring well to be screened in.,Sand A that started around 7 feet bsg.in <br /> CPT?.(screen Interval`and length to kie°based on Irtholo0y):. The other <br /> monitarrng well will be screened in Sand B-that started.around 30 feet bsg <br /> i.n CPT7 (screen intervaf"and length to be based on lithology).. <br /> 5 Collection of. sort samples,..Nell development, purging and collection of <br /> wrater samples. {` <br /> 6, Laboratory analysis of;soif and water samples for total.petroleurn <br /> .hydrocarbons.(TPH)as.,gasoline, BTEX, MTBE, TBA, and other:: --s ,' i i:.- <br /> :oxygenated gasoline additives using EPA-method 8260B. <br /> 7: Disposal-of soil cuttings appropriately ,..;% <br /> 8. Preparation of a report of findings on the work performed. <br /> l <br />