Laserfiche WebLink
ENVIRONMENTAL ]HEALTH DEPARTMENT <br /> -Qe ` SAN JOAQUIN COUNTY <br /> � UiriT Supervisors <br />' Donna K Heran,R E H SCarl Borgma,i,R E H S <br /> w` 304 East Weber Avenue, Third Floor <br /> Derecror Mike Huggins R E H S,R D I <br /> Al Olsen,R E H S Stockton, California 95202-2708 Douglas W Nilson,R E H S <br /> c¢t' �da�,p • Program Afannger Telephone (209) 468-3420 Margatct Lagarto,R E I I S La uric A Cotulla,ILE H.S Fax (209)464-0138 Robert McClellon,R E H S <br /> Program,11anager Mark Barcel los,R E H S <br /> KM HILLIARD APR 2004 <br /> 7-ELEVEN INC --- -- - -- — <br /> PO BOX 711 1 "�n(t�-` — ' —'- <br />' DALLAS TX 75221-0711 ! <br /> rZ 16 cn:.,nji l L <br /> RE 7-Eleven Store#32262 Site Code # 150 <br />' 2360 Grant Line Road <br /> Trac} C-X 95376 <br /> !MRK PLA+. Vork Plan for Additional Assessment and Interim Remediation' <br />' D,ATED, Afarch 19,2004 <br /> PRF ARED BY, SECOR International incorporated <br /> [X]_With conditions,see below <br />' �IDFOr r TF �Np NiECR ELEMENTS OF'TFiE NVORK PLAN [H&S 2-5299 37,subd(c)(3)] <br /> s - <br /> 1 Insr-Aitron of three shallow groundwater morutonng wells for lateral assessment of the shallow cont knunant plume <br /> The borings for These yells are proposed to be continuously cored from 10-17 feet bsg <br /> 2 Installation of two cone pcnetxometor rest(CPT)borings for assessment of the .ectical extent of the contaminant <br /> plume Proposed depth of the CPT borings Is 80 feet bsg Discrete soil and groundwater samples will be collected <br />' and submitted for analysts <br /> 3 Installation of one groundwater eatracuon well to perform a groundwater emraction feasibilitl stud},and utstallanon <br /> of one oxygen tnfusion sparge point to perform an olvgen Infusion feasibility study These studies are being done to <br /> determine the most appropriate method of interim remediation :Methods of each test are outlined in the work plln <br />' COMMENTS AND <br /> 1 H1 dropunch groundwater samples from the CPT borings should be collected from all appropriate permeable <br />' intervals,not lust at total depth <br /> 2 -lddruonal deep,discrete]) screened monatoring wells must be inst-illed to define the lateral c-%tcnt of the groundwater <br /> contamm-ation at depth Data obrauled from the CPT invcstigatton can be used to sue these tells <br />' 3 Biologic-d data must be collected to support the Idea that ox)gcn Infusion will stimulate microbes to break down the <br /> WtBE contamination <br /> 4 A San Joaquin County well permit appllcatton,and required$89 00 permit fee,must be subn ttted for each parcel of <br /> land on which dcilliing w331 be done,City of Tracy encroachment permits acid/or access agreements from offsue <br />' property owners must be submitted to SJC/EHD with the pemut applicauons <br /> 3 A Report of findings must be submitted to SJC/EHD within 60 days following completion of all fietdwork A Site <br /> Conceptual Model and work plan for Installation of deep monitoring wells arc due for submittal at the same tune <br /> Lon Duncan,Senior REHS Nuel C Hen d an,J r,R-G <br /> LOP/Site Nliugation Unit 1V LOP/Sue NIrugatton Unir I,%r <br /> cc James Barton,CVRWQCB <br /> Bnan Carey,SECOR <br />