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Ms.Mareet Lagorio • <br /> November 10,2000 <br /> Page 4 <br /> when three successive measurements of field parameters are within 10 percent. Instrument <br /> calibration will be conducted at the beginning of each field day, and thereafter if suspect or <br /> erroneous readings occur. Purge water will be stored in labeled drums pending characterization <br /> and appropriate disposal. <br /> Samples will be collected by bailer and transferred to laboratory-provided containers appropriate <br /> for the analyses to be conducted. Samples collected for dissolved iron will be field filtered with <br /> a disposal 0.45 micron filter. The sampler will don new disposable latex gloves prior to <br /> collection and handling each sample. Sample containers will be labeled with the site name, <br /> sample identification,sample depth, date and time of sampling,and initials of the sampler- The <br /> sample will be placed in a sealable plastic bag and placed on ice in a cooler pending <br /> transportation to the laboratory. The sample information will also be logged on a chain of <br /> custody form along with the analyses to be run. The chain of custody will accompany the <br /> samples from the time of collection to delivery to the laboratory. <br /> Groundwater Sample Analyses <br /> Each groundwater sample will be analyzed for: <br /> • Total Petroleum Hydrocarbons for Diesel (TPHd) — Method 8015 modified for <br /> diesel <br /> • Total Petroleum Hydrocarbons for motor oil (TPHm)—Method 8015 modified for <br /> motor oil <br /> • Polynuclear Aromatic Hydrocarbons (PAHs) — Method 8270 — semi volatile <br /> organic compounds <br /> • Aromatic Hydrocarbons [benzene, toluene, ethylbenzene and total xylenes <br /> (BTEJ)]—Method 8021 <br /> • pH—Method 9045 <br /> • Iron—Method 6010 (dissolved and total) <br /> Equipment Decontamination and Waste Containment <br /> Non-disposable sampling equipment will be decontaminated between samples by a three-bucket <br /> wash: washing with a non-phosphate detergent, rinsing in tap water, and rinsing again in <br /> distilled water. Drilling equipment will be decontaminated with a high-pressure washer. <br /> Decontamination fluids and water will be stored in 55-gallon steel drums. <br /> Drill cuttings will be stockpiled on-Site on plastic sheeting pending analyses of the groundwater. <br /> If groundwater is not impacted the soil cuttings will be deposited to the ground. <br /> P:\20000\20587\WKPLNwellsLdoc <br />