ARCHIVED REPORTS_XR0012756 (2) - Laserfiche WebLink

Home Browse Search

r d' f ' X' Tri-Valley Growers March 24, 1988 Project No, 1582G Page 3 sand was poured down the annulus to make the desired gravel pack. After the sand had been placed, the remaining auger was removed. A bentonite seal was placed and the hole was then grouted to one foot below the surfac.3 with neat cement. The top of the well was set in a pre-cast concrete box which was then surrounded by concrete to one inch above grade. The details of the well construction are presented in the Monitoring Well Detail form included with �. this report. WEI_I-DEVELOPMENT AND SAMIEI„IN After the well was constructed, it was developed to improve the hydraulic conductivity between the well and the natural water-bearing formation. Ten well volumes of water were manually bailed from the well to remove residual silts and clay left from the drilling operations. After development, the well ' was allowed to return to equalization prior to sampling, enabling Exceltech to collect a representative water sample and to measure the thickness of any floating product if present. Prior to ground-water sampling, a water level measurement was made and the u monitoring well was checked for the presence of free float;ng product with a clear plastic bailer. The well was purged of at least four well casing volumes of ground-water to assure that the sample was representative of formation water. The sample was collected with a clean stainlass steel bailer and _ transferred to the appropriate laboratory supplied bottles. Samples were labeled, logged on a chain-of-custody form, and placed in an ice chest for transport to a state-certified laboratory for analysis. No floating product was observed in the monitoring well; however, product odor was reported in the water sample taken from the well.