ARCHIVED REPORTS XR0007845 - Laserfiche WebLink

Home Browse Search

Ms Lon Duncan August 15,2000 Page 3 of 4 Centigrade for submittal under chain of custody protocol to a California-certified hazardous waste testing laboratory Selection of soil samples for laboratory analysis will be based on field evidence of petroleum hydrocarbon contamination such as discoloration, odors, and FID readings, as well as lrthologic changes If no evidence of contamination is noted in the field, samples from the capillary fringe will be submitted for analysis All sampling and drilling equipment will be washed thoroughly with laboratory-grade detergent and water between uses to minimize the potential for cross contamination Drill cuttings and wastewater generated during drilling activities will be contained and labeled pursuant to 49 CFR part 172 and 40 CFR part 262, pending laboratory results and the development of disposal options Selected soil samples will be analyzed for the presence of total petroleum hydrocarbons as gasoline (TPHg) and diesel (TPHd) using EPA method 8015 modified, total recoverable petroleum hydrocarbons (TRPH) using EPA method 418 1 or equivalent, benzene, toluene, ethylbenzene and xylenes using EPA method 8020, VOCs using EPA Method 8260, and total lead using EPA Method 6010 Surveying, Well Development, and Groundwater Sampling The elevations of the well casing collars will be surveyed to an accuracy of 0 01 feet A nimmurn of 24 hrs after completion, an experienced field technician will measure static depth to water and then develop the new wells by pumping and surging until turbidity is minimized A groundwater sample will be collected from each well after pH, temperature, and electrical conductivity have stabilized and the wells have recharged to minimum of 801/6 of static levels After collection, the samples will immediately be capped, labeled, segregated and placed in an ice chest at a temperature of approximately 4° Centigrade for submittal under chain of custody protocol to a California-certified hazardous waste testing laboratory Samples will be analyzed for the presence of TPHg, TPHd, TRPH, BTEX, VOCs, gasoline oxygenate additives and dissolved lead by the appropriate methods All sampling equipment will be washed thoroughly with laboratory-grade detergent and water between uses to minimize the potential for cross contamination Wastewater generated during well development activities will be contained and labeled pursuant to 49 CFR part 172 and 40 CFR part 262, pending laboratory results and the development of disposal options Reporting Following the receipt of analytical results, a technical report describing the methods and results of this investigation will be submitted to PHS/BHD The report will describe to the degree possible the nature and extent of contamination, and will contain recommendations for additional work as appropriate G1Data1GROUNDZE1GABBARDlreports\MW_WOPKPLAN doc