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ENVIRONMENTAL HEALTH`DEPARTMENT
<br /> 'O PgU1N CO SAN JOAQUIN COUNTY
<br /> Donna K.Henan,RE.H.S. Unit Supervisors
<br /> a' ?a Carl Borgman,R.E.H.S.
<br /> Director 304 East Weber Avenue, Third Floor
<br /> At Olsen,RE.H.S. Stockton, California 95202-2708 Mike Huggins,R.E.H.S.,R.D.I.
<br /> 'Po
<br /> N: Douglas W.Wilson,R.E.H.S.
<br /> Program Manager Telephone: (209) 468-3420
<br /> Margaret Lagorio,R.E.H.S.
<br /> <7FBA Laurie A..Cotulla,RE.H.S.
<br /> Fax: (209)464-0138 Robert loon,R.E.H.S.
<br /> Program Manager Mark Bucel Barcellos,R.E.H.S..
<br /> NOV 0 3 2004
<br /> D CHARLES SKOBRAK
<br /> 9947 EAST HIGHWAY 26
<br /> STOCKTON CA 95215
<br /> RE: Larry's Auto SITE CODE 1122
<br /> 308 North Grant Street RO: 194
<br /> Stockton, CA 95202
<br /> San Joaquin County Environmental Health Department(EHD)has reviewed Work Plan
<br /> Addendum—October 2004 dated October 20, 2004, and prepared by Advanced
<br /> GeoEnvironmental, Inc. (AGE) for the above-referenced site. This work plan addresses the
<br /> advancement of six-paired cone penetrometer testing (CPT)borings to depths of 225 feet
<br /> below ground surface (bgs)to investigate soil lithology and hydrogeologic units, and to
<br /> define the vertical and lateral extent of impacted groundwater. CPT-1 is to be advanced at
<br /> the former underground storage tank location at the northwest corner of this site, and CPT-
<br /> 7 is to be advanced approximately eight feet west of monitoring well MW-7 at the south
<br /> end of this site; CPT-4 is to be advanced at the southwest corner of 331 North Aurora
<br /> Street; CPT-5 is to be advanced at the northwest comer of 825 East Miner Avenue; CPT-6
<br /> is to be advanced at the southern edge of 835 East Miner Avenue; and CPT-8 is to be
<br /> advanced on the west side of Grant Street opposite monitoring well MW-3.
<br /> Although many of the CPT boring locations differ from what EHD proposed during a
<br /> meeting with AGE on June 12, 2003, EHD approves the work plan as submitted. EHD also
<br /> recommends that an additional CPT-paired boring (CPT-9)be advanced to a total depth of
<br /> 225 feet bgs at the southern boundary of 806 East Lindsey Street. EHD believes this
<br /> newly-proposed boring would complete the investigation to the north for the above-
<br /> referenced site. Please submit access agreements for each parcel, the City of Stockton
<br /> encroachment permit, boring permit applications for each parcel, and permit fees of$89.00
<br /> per parcel, to EHD by December 6, 2004. Fieldwork must be completed by December 17,
<br /> 2004 and the report of finding must be submitted within eight weeks of completing the
<br /> fieldwork.
<br /> EHD directs you to collect grab groundwater samples from each distinct, saturated
<br /> permeable zone during the advancement of the paired borings. Although the work plan
<br /> proposes to analyze groundwater samples by Environmental Protection Agency(EPA) SW-
<br /> 846 Method 8260B and report the entire suite of analytes, EHD recommends that you
<br /> report only compounds that have historically shown positive results. These include
<br /> benzene, toluene, ethyl benzene, total xylenes, di-isopropyl ether(DIPE), methyl tertiary-
<br /> butyl ether(MTBE), tertiary butyl alcohol (TBA), 1,2-dichloroethane (1,2-DCA), 1,2-
<br /> dibromoethane(EDB), n-butyl benzene, sec-butyl benzene, tert-butyl benzene, carbon
<br /> disulfide, chloroform, chloromethane, p-isopropyltoluene,methyl ethyl ketone,
<br />
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