Laserfiche WebLink
10 August 2002 <br />' AGE-NC Project No 98-0433 <br /> Page 2 of 4 <br /> Ithen collected from each well using the pre-dedicated disposable bailer In addition, a water sample <br /> was collected from the domestic well (DW-1) on the site by allowing the well pump to operated for <br />' one minute, then collecting a water sample from a dedicated sample tap I <br /> The water from each monitoring well was transferred into thi ee chilled 40-m1 volatile organic analysis <br />' (VOA)vials containing 0 5 ml hydrochloric acid(18%)as a sample preservative and one 1-liter amber <br /> bottle without preservative, water from the domestic well was poured directly into the sample <br /> containers from the 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, <br /> • Benzene, toluene, ethyl benzene and total xylene (BTEX) and methyl butyl ether(MTBE) in <br />' accordance with EPA Method 8021B, <br /> • The oxygenated fuel additives MTBE, tertiary butyl alcohol (TBA), dr-isopropyl ethet <br />' (DIPE), ethyl tertiary butyl ether (ETBE) and tertiary amyl methyl ether (TAME) in <br /> accordance with EPA Method 8260 Modified <br />' <br /> 3 FIND G.0 <br /> . IN S <br />' Ground water elevations were determined by subtracting the measured depths-to-water from the <br /> surveyed casing elevations Ground water flow chi ections were detem--uned by contouring the water <br />' elevations on a scaled site plan (Figure 3) The impact of the unauthorized release on ground water <br /> was quantified by laboratory analysis of samples collected during the quarter <br />' 3 1 GROUND WATER GRADIENT AND FLOW DIRECTION <br />' Depth to ground water at the site on 20 June 2002 ranged from 20 53 to 22 27 feet below well casing <br /> tops The ground water elevations at the site ranged from 36 09 feet (MW-4) to 36 65 feet (MW-6) <br /> above mean sea level (msl) The data indicates an average decrease of the ground water elevation at <br />' the site of 1 1 feet since the previous quarterly monitoring event Depth to ground water and <br /> . calculated elevation date are presented in Table 1 <br /> Advanced GeoEnvtronmentai,Inc <br />