ARCHIVED REPORTS_XR0004898 - Laserfiche WebLink

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Fuller Mobile Home Park 365 E Louise Ave., Lathrop, California February 23, 1995 Phase HSite Characterization- Continued Page- 3 The cuttings from the drilling operation were containerized on-site during drilling for proper disposition The proper method of disposal will be dependent upon results of laboratory analysis This disposal is the responsibility of the client unless other arrangements have been made 3.2 Well Construction All materials used in well construction were thoroughly cleaned prior to introduction into the boring A Bentonite or cement and Bentonite grout was placed at the bottom of the borings as necessary After the seal has been allowed to set long enough to support the weight of the casing, a 2- inch diameter PVC well casing with end cap and factory perforations for placement in the saturated zone (taking into account seasonal variation) was placed in the boring The screen and filter pack sizes were as noted in the well completion logs The casing and end caps were threaded or joined by stainless steel screws, no PVC cement was used The filter pack extended two feet above the perforated zone A Bentomte seal two to three feet thick was placed in the annular space above the filter pack followed by a cement grout to the surface 3.3 Well Development and Sampling The wells were developed until the well water appeared clear of sediment, or until an appropriate number of well volumes (based upon the judgment of the responsible professional) had been evacuated The water produced during well development was containerized and left on-site in 35-gallon drums or other suitable containers for disposal as hazardous waste, if deemed necessary upon receipt of laboratory results Disposal is the responsibility of the client unless other Iarrangements have been made The wells were allowed to stabilize for twenty-four (24) hours prior to sampImg IAll soil and groundwater samples were properly labeled with the date collected, project number, sample coordinator and sample identification Field records documented the above information and other significant data such as names of on- site personnel, sampling methods, date and time of sampling, the number of well volumes removed before sampling, preservatives added (if any) and any filtration performed on the samples The samples were refrigerated immediately for delivery to the laboratory and under no circumstances were opened by anyone other than laboratory personnel Chain