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3. As an alternative to the Encore® sampler for laboratory analysis of VOCs, soil samples may be collected with a clean syringe. As per EPA Method 5035, a new plastic 10 ml syringe will have the bottom end removed,and the syringe will be inserted into the exposed soil until approximately five milliliters of soil is collected. If the soil is suspected to contain elevated levels of calcium, then a sample of the soil should be exposed to sodium bisulfate to test for effervescence. Calcareous soil samples may react upon contact with sodium bisulfate solution,causing VOC loss through effervescence and potentially cause failure of the VOA vial septum through pressure buildup. The soil must be field screened to determine if elevated concentrations of volatiles are detected,and the syringe samples must be collected within two hours of soil sample collection. The soil will then be extruded from the syringe into a laboratory preserved pre-weighed 40 ml glass vial.The vial caps must contain the special PTFE dual septa for the 5035 method. The vials will be preserved with either sodium bisulfate for low level concentrations of volatile constituents (detection limit<200 µg/kg),or methanol for elevated concentrations of volatile constituents(detection limit>200 gg/kg). Three vials will be filled from the single syringe for each laboratory sample collected.Each vial's label will be completed with the job number,the sample identification,date and time of collection,the sampler's name, and the analyses required. Each set of three vials will be placed into a sealed plastic bag or foam storage rack and then placed into an ice chest(chilled to 4°C) until delivered to a state-certified laboratory under chain-of-custody documentation. • A portion of the soil from the sample location will also be placed into a ziplock bag for lithologic logging and for field screening with an organic vapor analyzer(OVA), [such as a photoionization detector(PID), an organic vapor meter(OVM),or aflame ionization detector(FID)]. • Once the soil in the baggie has been allowed to sit for several minutes,the headspace of the baggie is screened for organic vapors with an OVA to document the presence or absence of vapors emitted from the soil. The OVA readings shall be documented on the field notes. • If UST piping has been removed,the soil beneath the piping shall be sampled at a frequency of 1 sample per 20 linear feet. The sample shall be collected, described, screened and documented in the same manner referenced above. Stockpile Sampling Activities • If a stockpile is to be sampled,the pile shall be measured and the approximate volume calculated. • In general, one discrete soil sample per 20 cubic yards of soil shall be collected. If the pile is large,composite sampling may be performed at a frequency of one sample per 100 cubic yards or more. The actual sampling frequency will be site specific. • Random sample locations within the stockpile should be sampled,but shall be representative of the stockpile material. • The sampler shall dig a minimum of 12 inches into the stockpile prior to collecting a SOP Soil Sampling for 5035 VOCs 3 of 5 August 2011