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CAMBRIA <br /> will be collected for possible chemical analysis and screened in the field for organic vapors using <br /> a photo-ionization detector (PID) at ten-foot intervals. Discrete groundwater samples will be <br /> collected from this boring at depths identified after review of the electronic CPT log. <br /> Soil samples from well borings MW-2 through MW-4 will be collected at five-foot intervals for <br /> lithologic description, field screening with a PID, and possible chemical analyses. A Cambria <br /> geologist will describe encountered soils from borings MW-2 through MW-4 using the Unified <br /> Soil Classification System and Munsell Soil Color Charts. <br /> Soil samples designated for chemical analysis will be retained in stainless steel or brass sample <br /> tubes. The tubes will be covered on both ends with Teflon sheets and plastic end caps. Soil <br /> samples will be labeled, entered onto a chain-of-custody record and placed into a cooler with ice <br /> for transport to a State of California certified laboratory for analyses. Groundwater samples from <br /> boring CPT-1 will be retained in glass vials preserved with hydrochloric acid, labeled, entered <br /> onto a chain-of-custody record, and placed into a cooler with ice for transport to a State of <br /> California certified laboratory for analyses. <br /> Monitoring Well Installation: Wells MW-2 through MW-4 will be constructed using four-inch <br /> diameter Schedule 40 PVC casing. Approximately 15 feet of screen will be placed in the well, <br /> with the screen placed at least 10 feet below and five feet above the top of the groundwater table. <br /> The sandpack will be placed from the bottom of the well screen to two feet above the top of the <br /> screen, followed by a one-foot thick bentonite seal. A cement-grout seal will be placed above the <br /> bentonite seal to grade. The well will be secured with a locking cap under a traffic-rated well <br /> box. A well completion report will be prepared for the groundwater monitoring well. The wells <br /> will be secured with a locking cap under a traffic-rated well box. A licensed surveyor will <br /> survey the horizontal well locations and the wellhead elevations relative to mean sea level. <br /> Well Development and Sampling: Blaine Tech Services, Inc. (Blaine) of San Jose, California <br /> will develop the groundwater monitoring wells prior to sampling. After well development, <br /> Blaine will collect groundwater samples. The samples will be submitted to a state-certified <br /> laboratory for analysis. This event will be coordinated with the quarterly sampling of well <br /> MW-1. <br /> Chemical Analysis: Selected soil samples will be analyzed for TPHg by EPA Method 8015 <br /> (modified) or equivalent and BTEX and MTBE by EPA Method 8260. Groundwater samples <br /> will be analyzed for TPHg by EPA Method 8015 (modified) or equivalent, BTEX by EPA <br /> 1359 4 <br />