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Groundwater Analytical Results <br /> Laboratory analysis shows that hydrocarbons in the groundwater <br /> have moved in a southerly direction As shown in Figure 2-3, <br /> groundwater collected from borings B-16 and B-19 have elevated <br /> concentrations of TPH Groundwater for Boring B-21, near the edge <br /> of the city property, contained 6 9 mg/kg of diesel No benzene was <br /> found in any of the HydroPunch samples. Analyses of the <br /> groundwater samples are shown in Table 2-2. <br /> TABLE 2-2 <br /> Groundwater Sampling Results <br /> Boring# Sample # TPH-Diesel Benzene Toluene EthyI}aenzene Xylenes <br /> (mg/l) (µg/l) (4g11) (µg/1) (4g11) <br /> B-16 HP-1 150000 NIA NIA N/A NIA <br /> B-17 HP-2 Q030 ' < 50 < 50 < 50 < 50 <br /> B-18 HP-18 0 970 N A N A N A N A <br /> B-19 HP-19 160 000 < 30 < 30 < 30 < 30 <br /> B-20 HP-20 0 035 < 30 < 30 < 30 < 30 <br /> B-21 I HP-21 6 900 1 <3 0 1 <3 0 1 97 2$ <br /> N A = Not Applicable <br /> Monitoring Well Construction <br /> Two of the soil borings, B-20 and B-21, were converted into monitoring <br /> wells MW-5 and MW-6, respectively (Figure 2-4) Both wells were <br /> completed approximately 15 feet into the saturated zone. <br /> Details of the well construction follow: <br /> • The well screen was four inches in diameter, schedule 40, slotted <br /> PVC A threaded cap was placed in the bottom of the casing; <br /> • The slot size was 0.010 inches based on formation grain sizes <br /> observed during field exam nation of the drill cuttings from the <br /> saturated zone, <br /> I <br /> • The well casing was four inches in diameter, schedule 40 PVC It <br /> was tightly threaded to the screen below and had a loclung cap on <br /> top; <br /> 2-4 <br />