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Stockton Cineplex Site <br /> Work plan for Preliminary Risk Assessment and Contaminant Mitigation <br /> Page: 5 <br /> Low concentrations of diesel range petroleum hydrocarbons (less than 1 mg/kg) were <br /> detected in soil samples collected from soil samples collected from boring B-9 at 20 <br /> feet. Diesel range petroleum hydrocarbons were also detected in water samples <br /> collected in borings B-5, B-6, B-7, and B-9. 3.1 µg/1 MTBE was also detected in the <br /> water sample from boring B-9. The MTBE is probably associated with the diesel <br /> range petroleum hydrocarbons. The levels can be attributed to the nearby storm <br /> drains or the Auto Storage facility historically located nearby. <br /> Low concentrations of chloroform (less than 0.7ug/1) were detected in detected in <br /> water samples collected in borings B-3, B-4, and B-6. Chloroform is a byproduct of <br /> chlorine use. Chlorine is commonly used for the sanitation of swimming pools or <br /> public water supplies. It can also be a common laboratory contaminant when city <br /> waters are chlorinated. The Laboratory that analyzed these samples is on chlorinated <br /> City of Modesto water. The concentrations are all within drinking water standards. <br /> Table 1. Summery Table Soil and Groundwater Analyses, <br /> Soil Labora ory Sample Results 5-24-00 <br /> Sample LD. TEPH Gas Method 8260B Compounds <br /> B-1-5' ND ND ND <br /> B-1-15' ND ND ND <br /> B-2-10' ND ND ND <br /> B-2-20' ND ND ND <br /> B-3-10' ND ND ND <br /> B-3-20' ND ND ND <br /> B-4-10' ND ND ND <br /> B-4-20' ND ND ND <br /> B-5-10' ND ND ND <br /> B-5-20' ND ND ND <br /> B-6-10' ND ND ND <br /> B-6-20' ND ND ND <br /> B-7-5' ND ND ND <br /> B-7-15' ND ND ND <br /> B-8-10' 7200 m oil ND ND <br /> B-8-20' ND ND ND <br /> B-9-10' ND ND ND <br /> B-9-20' 16 m diesel ND ND <br /> Note: ND=Non Detect <br /> Water Labo atory Sam le Results 5-24-00) <br /> Sample LD. TEPH Gas Method 8260B Compounds <br /> B-1-H2O NA ND ND <br /> B-2-H2O ND ND ND <br /> B-3-H2O ND ND 6.4 µ Chloroform <br /> B-4-H2O ND ND 4.9µ Chloroform <br /> B-S-HZO 0.08 m *diesel ND ND <br /> B-6-H2O 0.18 m *diesel ND 4.2 Chloroform <br /> B-7-H2O 0.08 m *diesel ND ND <br /> B-B-H2O ND ND ND <br /> B-9-H2O 0.31 m *diesel ND 3.1 MTBE <br /> *Weathered—considered old or degraded <br /> Note: ND=Non Detect NA= Not Analyzed <br />