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Invitation For Bid: Hartmann and Setness <br /> Site Addresses: <br /> Former Chase Chevrolet Facilities(separate Sites): <br /> . 423 N. Madison 424 N.Van Buren <br /> Stockton, California Stockton,California <br /> Page 12 <br /> E. TANK NUMBER 7 <br /> Tank No. 7 is reported to have been a <br /> 1,000 gallon gasoline UST removedX X X-X <br /> from the Van Buren Street Property in STORM DRA[N X <br /> 1986. Subsequent subsurface F ® X <br /> investigative work, which has consisted <br /> of soil borings and groundwater y m": "X—X—X x <br /> monitoring wells, conducted by Resna a <br /> CAR <br /> (formerly WaterWork) has provided de REPA RASH <br /> some information regarding soil and m o <br /> Z WASH AREA AWNING <br /> groundwater plume geometries. The 3111 SPRAY BOOTH <br /> estimated plume boundaries are shown B& B BODY SHOP <br /> on Figure 2 along with the most <br /> recently available analytical data for Figure 5. Current On-site Assessment Locations, <br /> groundwater samples. Van Buren Street Property �Dl <br /> m v zs�On�I-oY <br /> Soil plume extent assessment is �X— -- -wXX <br /> presently considered incomplete in all X 6 MW,S X C; �1✓' <br /> cardinal directions on the Van Buren p_ <br /> Street Property. The areal extents of NEW X <br /> the groundwater plume are also WELLS <br /> considered undefined in all but possiblyMwr< X—X <br /> the western direction. Figure 5 shows ,� <br /> the current sampling locations and the MW13 X <br /> estimated extents of the soil and N <br /> groundwater impact on the Site. CPT SOIL <br /> SAMPLING LOCATIONS <br /> Figure 6 shows locations of proposed <br /> Figure 6. Proposed Additional On-Site Assessment <br /> CPT soil sampling penetrations <br /> 11 Locations, Van Buren Street Property <br /> considered necessary to further assess <br /> the soil plume extents as well as target locations for additional onsite wells intended to <br /> further assess the on-site extents of the northwestern, eastern and southern extents of the <br /> groundwater plume. <br /> All protocols for CPT soil sampling and well installation are identical to those listed in <br /> previous sections except for chemical analyses. All soil and groundwater samples are <br /> intended to be analyzed for TPHg and BTXE by USEPA Method 8020 and 602. <br /> Modifications to these methods to allow for TPHg calculated concentrations from a <br /> combined method are preferred over separate analytical tests. <br />