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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 EthyMenzme Xylenes <br /> (mg/l) (µg/1) (µg/1) (ug/l) (4g11) <br /> B-16 HP-1 150,000 NIA NIA NIA N/A <br /> B-17 HP-2 0.030 <.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 HP-21 6.900 <3.0 <3.0 97 28 <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 /> .r wells MW-5 and MW-6, <br /> 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 examination of the drill cuttings from the <br /> saturated zone; <br /> • The well casing was four inches in diameter, schedule 40 PVC. It <br /> was tightly threaded to the screen below and had a locking cap on <br /> top; <br /> 2-4 <br /> c <br />