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,a <br /> 3. PLANNED ACTIVITIES AS OF JANUARY 1991 <br /> The next round of quarterly groundwater sampling to be completed by EA is planned for mid- <br /> June 1991. <br /> 4. DEFINITION OF PETROLEUM HYDROCARBONS IN THE SOIL <br /> Tank Closure Samples <br /> in <br /> ru- <br /> Soil samples were collected from the tank excavations at the time of the tonk removal 4)were detected <br /> ;c°y 1986(S-1 to S-6,Figure 3). Concentrations of TPH to 4,600 mg/kg(Table <br /> in soil samples collected from the excavation. The reports of amountofaffly investiected soigwas "minocomr and <br /> ed <br /> by Groundwater Technologies,Inc.,indicated that themount <br /> its distribution was"localized" (GTI report to Exxon, March 1986). <br /> Soil Borings <br /> Soil samples have been collected from soil borings that were completed as monitoring wells or <br /> were drilled specifically for soil sampling(see Figure 3). The results of the analyses of these <br /> samples are shown in Table 3 (for MW6-MW8,drilled by EA),Table 4(for MW3-MW5,drilled <br /> by GTI), and Table 5 (for 5135-S137, drilled by ':-A). No concentrations of TPH and BTEX <br /> kg have been measured in soil samples from these borings. <br /> greater than 2 mg/ <br /> Soil Vapor Surveys <br /> 1 - EA in 1987 and one by EVAX <br /> Two sol!vapor suryeys have been conducted at this site;one by m of TVH in the soil vapor <br /> in 1990. The EVAX results indicated the presence of up.�� 19,000 pp <br /> hese results were used by EVAX to design a soil venting reme- <br /> beneath the former tank Held. T <br /> dial plan. <br /> 5. STATUS OF SOIL REMEDIATION <br /> _._ n and <br /> On behalf of Exxon,EVAX Technologies has begun operationobru soil 1991.pormonitoring and <br /> treatment system at the site. The system went into opera[ <br /> progress reporting for this system are done separately by EVAX. <br /> 6. STATUS OF LIQUID-PHASE PETROLEUM HYDROCARBON DEFINITION <br /> Liquid-phase petroleum hydrocarbons have not been detected at the site, nor is their presence <br /> suggested by the concentrations of the hydrocarbons in the groundwater. <br /> 2 <br />