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ENVIRoEN
<br /> Z. P, TAL HEALTH DEPART
<br /> MENT
<br /> y *C603'
<br /> a Donna K. Heran
<br /> SAN JOAQUIN COUNTY
<br /> Director 304 East WeberAvenue,Third Floor Program Coordinators
<br /> Laurie A. Cotulla, R.E,H,S, Carl raimai 4ssist4nt Director Stockton,California 95202-2708 Mike Hu Borg .f�.`$'
<br /> Telephone: (209)468-3420 Margaret Lagor o, R E'.i�.D J.
<br /> Fax: (209)464-0138 Robert McClellon, R.E.H.S.
<br /> Website:www.s ov or ehd/ Jeff Carruesco, R.E.H.S.
<br /> Jg g/ Kasey Foley, R.E.H.S.
<br /> ASHRAF & YASMIN ALI
<br /> 20 TWELVE OAKS DRIVE DEC 12 2006
<br /> PLEASANTON CA 94566
<br /> RE: Fast and Easy Mart No. 38
<br /> 244 West Harding Way RO: 229
<br /> Stockton, CA
<br /> San Joaquin County Environmental Health Department has received and reviewed
<br /> Additional Site Assessment Work Plan dated October 30, 2006, submitted by Advanced
<br /> GeoEnvironmental, Inc. (AGE) on your behalf for the above-referenced site. In this work
<br /> plan, AGE proposes the advancement of two cone penetration testing (CPT) borings,
<br /> CPT-1 and CPT-2, and paired direct-push borings, to assess soil lithology and
<br /> stratigraphy and collect groundwater samples for chemical analysis; and installation of
<br /> two groundwater monitoring wells to further assess the groundwater plume.
<br /> EHD approves the advancement of two CPT borings to total depths of approximately 100
<br /> feet below surface grade (bsg). CPT-1 will be Iocated approximately five feet
<br /> north/northeast of monitoring well MW-1, and CPT-2 will be located approximately 55
<br /> feet southeast of MW-1. Groundwater samples will be collected from the twin boring
<br /> adjacent to each CPT boring at depths determined by CPT findings, and analyzed for
<br /> total petroleum hydrocarbons as gasoline (TPH-g); benzene, toluene, ethylbenzene, and
<br /> total xylenes (BTEX); methyl tertiary-butyl ether (MTBE), ethyl tertiary-butyl ether
<br /> (ETRE), di-isopropyl ether (DIPE), tertiary-amyl methyl ether (TAME), tertiary-butyl
<br /> alcohol (TBA), methanol, ethanol, 1,2-dibromoethane (EDB), and 1,2-dichloroethane
<br /> (1,2-DCA).
<br /> EHD also approves the installation of monitoring wells MW-4 and MW-5 after collecting
<br /> soil samples from the pilot borings at five-foot intervals for lithologic characterization.
<br /> Based on field observations, selected soil samples will be analyzed for TPH-g, BTEX,
<br /> MTBE, ETBE, TAME, DIPE, TBA, 1,2-DCA, and EDB. MW-4 will be located
<br /> approximately ten feet north of MW-1 and the well's total depth and ten-foot screen
<br /> interval will be set in the second groundwater zone as identified by CPT-1 findings.
<br /> MW-5 will be located approximately 50 feet north/northwest of MW-3 with a screen
<br /> interval between approximately 25 and 45 feet bsg. Groundwater samples will be
<br /> analyzed quarterly for TPH-g, BTEX, MTBE, ETBE, TAME, DIPE, TBA, 1,2-DCA, and
<br /> EDB.
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