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rxLr'- F-.� 3r -s r �-•...i' .ar,P. �.�- F. gra "'� _,i� r ^.*..ny 6°' a x• �c2k� .;�.., � ''•�'Y " <br /> V. <br /> I <br /> V <br /> D"'ATER a <br /> � GROUN <br /> TECHNOLOGY, INC. ,, , ,L�l��,��s <br /> � itis zt-+ <br /> February 8, 1989 <br /> project No. 202/150-4150 <br /> Nis. P".ane Hinson <br /> San Joaquin Local Health District <br /> 1.501 East Hazelton Avenue <br /> Stockton, CA 95205 <br /> RE: SUBSURFACE ENVIRONMENTIL INVESTIGATION <br /> TEXACO SERVICE STATION . <br /> 440 CHARTER WAY <br /> STOCKTON, CALIFORNIA <br /> Dear Ms. Hinson: <br /> "^ Presented below are proposed work steps for a subsurface environ- <br /> mental investigation at the above-referenced site. The work <br /> steps are being proposed in addition to a previously Submitted <br /> work plan dated November 10, 1988, and in response toa letter <br /> from the San Joaquin Local Health District (SJLHD) <br /> mber <br /> 29, 1988. <br /> In your letter you stated that work steps proposed in our <br /> original work plan may not a,.equately define the vertical and <br /> lateral extent of hydrocarbon in the subsurface soils. Specifl- <br /> cally, your office was concernedthat placement <br /> tof the <br /> on of <br /> proposed soil borings may padequate <br /> potentially impacted subsurface soils. In order to further <br /> define the vertical and lateral extent of subsurfao' osed� <br /> carbons, the following additional work steps are proposed: <br /> Drill , log, and sample additional borings in the <br /> vicinity of the removed product dispensers (Fle gure 1) <br /> ' This would include the dr.11ing of ang <br /> access the subsurface sails beneath the existing <br /> station canopy. <br /> Drill , log, and sample additional on-site borings as <br /> needed to better define any impacted subsurface soils. <br /> These additional borings would be drilled if field <br /> }4- d <br /> evidence indicates that hydrocarbon impacted soils are <br /> more widespread. <br /> rhnuiyhuu!!he(:S.,Cunuda aad(T Y"-dJ <br /> q <br /> :i <br />