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25 Groundwater Monitoring, Sampling and Analysis <br /> On March 23, 2005, Ramage Environmental monitored and sampled groundwater from the new <br /> well (MW-7) and the six existing wells Upon arrival at the site, each of the wellheads was <br /> inspected and opened Depth-to-groundwater was measured in each of the wells using a water <br /> level indicator capable of measuring groundwater to within 0 01 foot A 0 05-foot thick layer of <br /> separate-phase hydrocarbons (r e , free product) was observed in MW-1 <br /> iFollowing the groundwater level measurements, six of the seven monitoring wells were purged <br /> and sampled Due to the presence of free product, MW-1 was not sampled The wells were <br /> purged using a pump and dedicated disposable tubing, until at least three well casing volumes <br /> were extracted, and/or after groundwater temperature, pH and electrical conductivity values had <br /> stabilized Following well purging and recharge, groundwater was sampled from the wells using <br /> dedicated disposable bailers and laboratory-supplied containers Each sample container was <br /> labeled, packaged in an iced cooler and transported with chain-of-custody documentation to <br /> Excelchem for analysis Excelchem analyzed each of the groundwater samples for TPH-as- <br /> gasoline, BTEX, MTBE, DIPS, ETBE, TAME, TBA, and 1,2-DCA by EPA Method 82606 <br /> 26 Free Product Removal <br /> On March 7, 2003, Ramage Environmental installed a Hydro-SkimmerTM passive free product <br /> skimmer m MW-1 The passive skimmer is four-inch diameter and 64-inches long, with a 10-inch <br /> recovery zone <br /> Between March 7, 2003 and March 23, 2005, after 33 site visits, approximately 212 83 ounces of <br /> accumulated free product has been removed from the skimmer During the first quarter of 2005, <br /> between January 10, and March 23, 2005, a total of 4 5 ounces of free product were removed in <br /> three monthly site visits Each of the free product removal events is summarized in Table 4 <br /> 27 Waste Storage and Disposal <br /> All waste soil and cement generated during drilling was contained in 20 55-gallon on drums During <br /> the drilling activities between February 23 and 25, 2005, Ramage Environmental collected <br /> representative soil samples from each boring to characterize the waste soil The soil samples <br /> were combined into five, 2-inch by 6-inch brass sleeves, and transported with the investigation <br /> samples under separate chain of-custody documentation to Excelchem <br /> 9 <br />