Laserfiche WebLink
June 10, 1998 <br /> Page 3 f <br /> for analysis. Groundwater samples will be an2tlyzed for the presence of TPH-g, <br /> BTEX, and MtBE. <br /> PHASE THREE: Groundwater Monitoring Well Installation ' <br /> Utilizing information obtained from the phase two Geoprobe® Investigation, locations <br /> will be proposed for the groundwater monitoring ells. The proposed wells will monitor <br /> concentration levels of possible contaminants and determine groundwater gradient and <br /> directional flow. <br /> • Soil Sampling and Analysis. Soil samples will be collected every five vertical feet <br /> from each boring. A maximum of two samplt s will be selected from each boring, one <br /> based on any elevated flame-ionization detector(FID) or photo-ionization detector <br /> (PID) field results and one at the approximate location of the soil/groundwater <br /> interface. Selected soil samples will be submi ed to a California State-certified <br /> laboratory and analyzed for the presence of T H-g, BTEX, and MtBE. <br /> • Groundwater Well Development and Analysis. After well development, water <br /> samples will be collected from the wells andsubmitted to a California State-certified <br /> laboratory for analysis. Groundwater samples will be analyzed for the presence of j <br /> TPH-g, BTEX, and MtBE. i <br /> I <br /> • Well Surveying. Upon completion of well construction and development, the wells <br /> will be surveyed by a licensed surveyor for el vation relative to mean sea level. <br /> Groundwater gradient will be interpreted utili 'ng wellhead elevations and depths to <br /> water. <br /> Report. A report will be prepared after completi`n of necessary field work. The report <br /> will include boring logs, well location map, soil arid groundwater hydrocarbon <br /> concentrations map, groundwater contour map, soil and groundwater analytical results, <br /> and chain-of-custody documentation. <br /> r <br /> 91 I-007.1 B/wRKPLN <br />