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Stockton Promenade—N Edisontreet USTs& Utility Corridors • Page 12 Underground Storage Tank Removal Report lune 8,2009 WKA No.7345.09 1 • Elevated levels of cadmium and zinc were identified in the soil excavated out of Tank#2 ' (T2-Fill) at 7.9 mg/kg and 2,700 mg/kg, respectively. Although elevated as compared to the results of other soil samples collected from this area, Tank#2 consisted of galvanized steel, which may be the source of increased cadmium and zinc levels since the soil was contained within the tank. For comparison, the soil sample collected from approximately one foot beneath the bottom of Tank#2 had cadmium and zinc concentrations of 0.78 ' mg/kg and 1200 mg/kg, respectively 6.3 Exploratory Test Pit Results Seven soil samples were collected from the exploratory test pits. • TPHd was detected in six of the seven soil samples analyzed from the exploratory test ' pits ranging from 16,000 mg/kg(EP4-6) to 270 mg/kg(EP4-18) • Using Silica Gel clean-up, TPHd was detected in four of seven soil samples analyzed ' from the exploratory test pits ranging from 16,000 mg/kg(EP4-6) to 1,100 mg/kg (EPI- 15) ' • TPHmo was detected in three of the seven soil samples analyzed from the exploratory test pits ranging from 21 mg/kg(EP2-7) to 16 mg/kg(EP145) ' • TPHg was detected in six of the seven soil samples analyzed from the exploratory test pits ranging from 1,600 mg/kg (EP 1-15) to 270 mg/kg(EP4-18) ' • There were detectable concentrations of VOCs in six of the seven soil samples analyzed from the exploratory test pits ' 6.4 Direct-Push Boring Soil Results ' Two soil samples were collected from Geoprobe boring E13-1. • TPHd was detected in the two soil samples analyzed from the direct-push borings ranging from 780 mg/kg(EB-1-8) to 350 mg/kg(EB-1-16) ' • TPHmo was detected in one of the two samples analyzed from the direct-push borings at 14 mg/kg (EB-1-8) • TPHg was detected in the two soil samples analyzed from the direct-push borings ranging from 440 mg/kg(EB-1-8) to 430 mg/kg(EB-1-16)