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1 Work Plan Page 18 Former Manna Pro Site ' Project No 207 3 August 16, 1999 ' Groundwater parameters will be continuously monitored using a YSI flow cell attached directly to the discharge on the pump Dissolved oxygen content and Oxidation- Reduction potential will also be continuously monitored Before a sample is collected, the well's water level is allowed to recharge to at least 80% ' of its initial level A bailer is then used to collect each sample Bailer cleanliness is assured by collecting a bailer blank (pouring distilled water through the bailer and collecting it in a VOA vial) prior to collecting the analytical sample Before and in ' between uses, all sampling equipment will be washed using a portable steam cleaner Disposable gloves will be worn by the sampling technician while collecting all samples and changed between the collection of each sample to reduce the potential for cross- contamination Extreme care will be exercised while collecting samples to prevent agitation of the water ' contained in the bailer Water samples will be carefully transferred from the bailer into 40 ml VOA vials preserved with hydrochloric acid and I liter capacity amber glass bottles ' (provided by the analytical laboratory) All samples will be tapped to check for head space bubbles, labeled, inserted into foam holders and placed in an ice chest cooled to 4°C for transport to the laboratory A chain of custody document, listing all samples collected and their intended analyses will accompany the samples from field to the laboratory, thereby providing a means to track their movement and insure their integrity All water removed from each monitoring well and not used as a sample, will be placed in a 55 gallon DOT (Department of Transportation 17-H) approved container that is properly labeled and temporally stored on-site awaiting proper disposal 6.3 Air Sample Collection Air samples will be collected at various times during the pilot test Samples will be collected in a Tedlar bag attached to Tygon tubing which is in turn attached to a sampling port on the VES system The bag is then placed into a hermetically scaled box and air is evacuated from the box using a hand pump As air is evacuated from the box, the Tedlar bag fills and an air sample is collected An OVM reading is made from the air contained in the bag, the Tygon tube discarded, and the bag placed in a cool environment for immediate transport to the analytical laboratory A chain of custody document, listing all samples collected and their intended analyses will accompany the samples from field to the laboratory, thereby providing a means to track their movement and insure their integrity 2937 Veneman Ave,#13240 Geo-Please Environmental Inc Phone(209) 569-0293 Modesto, CA 95356 Fax(209)569-0295