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1 <br />' 22 December 2003 <br /> . AGE-NC Project No 98-0433 <br />' Page 2 of 5 <br />' Prior to the collection of ground water samples, the depth to ground water was re-measured In each <br /> well to ensure that a minimum of 80%of the initial water volume had recharged Water samples were <br /> then collected from each well using a disposable plastic bailer In addition, a water sample was <br />' collected from the domestic well (DW-1) on the site by allowing the well pump to operate for one <br /> minute, then collecting a water sample from a dedicated sample tap <br />' The water from each monitoring well was transferred into three chilled 40-m1 volatile organic analysis <br /> (VOA) vials containing 0 5 ml hydrochloric acid (18%) as a sample preservative and one 1-liter <br /> amber bottle without preservative Water from the domestic well was poured directly into the sample <br /> containers from a dedicated sample tap <br /> After collection, the samples were labeled and placed in a chilled container for transportation under <br />' chain-of-custody to Cal Tech Environmental Laboratories, Inc (CTEL), a state of California <br /> Department of Health Services-certified analytical laboratory Each sample was analyzed for <br />' Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d) in <br /> accordance with EPA Method 8015 Modified, and, <br /> 1 0 Benzene, toluene, ethylbenzene and total xylenes (BTEX) and the fuel additives methyl <br /> tertiary butyl ether (MTBE), tertiary butyl alcohol (TBA), di-isopropyl ether (DIPE), ethyl <br /> tertiary butyl ether(ETBE),tertiary amyl methyl ether(TAME), ethylene dibromide(EDB), <br /> 1,2-dichloroethane(1,2-DCA), in accordance with EPA Method 8260 <br /> Modified � 4,1,_ -,/ '11-`1656 <br /> v� <br /> 2 3 FREE PRODUCT GAUGING AND RECOVERY <br />' Under the California U derground Storage Tank Regulations, Article 5, Section 2655, free-product <br /> was recovered in well��MW-6 using a passive skimmer deployed m the well,y 07 <br />' November 2003 The depth to ground water during a monitoring event on 21 October 2003, was <br /> lower than suitable for free-product interface with the top of the product skimmer, not allowing for <br /> the collection of product with the skimmers and further did not indicate product in wells MW-1 or <br />' MW-6 Therefore,an adsorbent material,or petroleum recovery-sock was placed within the two wells '� <br /> on 07 November to absorb any product which develops on the water table The filler is hydrophobic <br /> and petroleum will collect on the scouring media, without collecting ground water A set of data <br />' sheets from the product gauging events is included in Appendix A The free product was stored on- <br /> site in a 55-gallon DOT H-17 storage drum with a recovery drum <br /> t <br /> Advanced GeoEnvironmental,Inc <br />