ARCHIVED REPORTS_XR0004901 - Laserfiche WebLink

Home Browse Search

• September 15, 1993 Working To Restore Nature A Telchert & Son, Tracy, California before use In each well A clean bailer was used to obtain a sample from the surface of the water in the well for subjective analysis of hydrocarbons The sample was retrieved and examined for floating product, sheen, color, and clarity. • Approximately 3 well volumes (approximately 50 gallons) were purged from each well with a stainless-steel electrical submersible pump to allow sampling of representative formation water The pump, cables, and hoses were cleaned with a laboratory-grade detergent and water before use In each well. The wells were purged until pH, temperature, and electrical conductivity of the water stabilized,as measured by portable meters calibrated to a standard buffer and conductivity standard The water level was allowed to recover to at least 80 percent of the initial water level A sample of the formation water then was collected from the surface of the water in each of the wells with the Teflon bailer and slowly transferred to laboratory-cleaned sample containers The recovered fluids from sampling in each well were directed into type 17-E, steel, 55-gallon liquid waste drums approved for this use by the Department of Transportation Hydrochloric acid (or other appropriate chemical) was added to the sample vials as a preservative. A sample of the formation water then was collected from the surface of the •� water In each of the wells with disposable clean Teflon bailer and slowly transferred to laboratory-cleaned sample containers Sampling of Drill Cuttings Drill cuttings were sampled by scraping 6 to 12 inches of soil off the stockpile surface A • sample was then collected by driving a hand-operated percussion sampler, equipped with a clean brass sleeve, into the stockpiled soil Four soil samples were collected from the dnll cuttings and composite into one sample for laboratory analyses The soil samples selected for possible laboratory analysis were removed from the sampler and quickly sealed in their brass sleeves with aluminum foil, plastic caps, and aluminized duct tape The respective • sample containers were labeled in the field with the job number, sample location and depth, and date, and promptly placed in iced storage for transport to the laboratory Chain of Custody Records were initiated In the field by the geologist or technician and accompanied the samples to a laboratory certified by the State of California to perform the analyses requested Sample-Labeling and Handling Soil samples collected for possible chemical analyses were promptly sealed with aluminum foil, plastic caps, and tape They were then labeled and placed In iced storage for transport • to the analytical laboratory Water samples were preserved in laboratory-cleaned, 40- 0 0803gtak 123009-1 0