ARCHIVED REPORTS_XR0002573 - Laserfiche WebLink

Home Browse Search

GRANITE CONSTRUCTION COMPANY WKA No 2088 06 October 12, 1994 Page 5 thick bentonite seal will be placed in the well annulus above the filter pack A grout seal consisting of Portland Cement and bentonite slurry will be tremted into the well annulus above the bentonite seal The wells will be completed with locking well caps and flush-mounted, traffic-rated well covers A diagram showing construction details of the proposed ground water monitoring wells is shown on Plate 4 The wells will be developed using a vented surge block and pumped until relatively free of sediment and/or until stabilized pH, temperature and conductivity readings are attained The water purged during development will be placed in sealed, labeled 55-gallon drums and stored on site Following installation and development, water samples will be obtained from the wells Prior to . sampling, a water level measurement will be recorded, and the wells will be checked for the presence of free product using a clear bailer The wells will then be purged of at least three well volumes of water or until stabilized pH, temperature and conductivity readings are attained, purge water will be stored to sealed and labeled, 55-gallon drums as described above Subsequent to purging, the water sample will be obtained with a disposable bailer and decanted into appropriate sample containers provided by the laboratory The water samples will be stored on ice in. an ice chest and submitted under chain-of-custody to a California-certified laboratory, along with a travel blank, for analysis of one or more of the following TPH using Modified EPA test method 8015, BTEX using EPA test method 602, and Lead using EPA test method 7421 Subsequent to construction, the two new wells will be surveyed to provide basis for calculation of ground water flow direction and gradient `NK WALLACE KUHL R`ryledlupr fir ASSOCIATES INC