Laserfiche WebLink
Metadata
Document management portal powered by Laserfiche WebLink 9 © 1998-2015 Laserfiche. All rights reserved.
' 04 February 2000 <br /> AGE-NC Project No 99-0647 <br /> Page 2 of 4 <br /> 1 <br />' 2 2 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLE <br /> A water sample was collected from monitoring well MW-1 using a new disposable bailer after <br />' allowing the well to achieve a minimum 80%recovery of the pre-purge water volume The sample <br /> was transferred into 40-m1 EPA-approved vials containing 0 5 ml 18%hydrochloric acid as a sample <br /> preservative The sample vials were then labeled with the monitoring well designation, date, time <br />' of sampling and the sampler's Initials The samples were transported in a chilled container under <br /> chain of custody to McCampbell Analytical, Inc (MAI), a Callforma Department of Health Services <br /> (DHS)-certified analytical laboratory for analysis The samples were analyzed for <br /> I <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> Method 5030/8015Modified, <br />' Volatile aromatic compounds-benzene, toluene, ethylbenzene, and total xylenes (BTEX) <br /> with methyl tertiary butyl ether(MTBE) in accordance with EPA Method 8020, and <br />' Fuel oxygenates,Including tertiary butanol(TBA),di-isopropyl ether(DIPE),ethyl tert-butyl <br /> ether(ETBE), tert-amyl methyl ether(TAME), and MTBE in accordance with EPA Method <br /> 8260M <br />' 3.0. FINDINGS <br />' Hydrocarbon-impact to ground water was Inferred from laboratory analysis and field observations <br /> Ground water elevations were determined by subtracting the measured depths-to-water from the <br /> surveyed casing elevations (Table 1) Ground water flow direction was determined by contouring <br /> the ground water elevations on a scaled site plan (Figure 4) <br /> 3 1 GROUND WATER ELEVATION AND GRADIENT <br /> Ground water elevation Increased 0 29 feet to 55 52 feet below the top of the well casing in MW-1 <br /> since the September 1999 monitonng event Monitoring data from MW-1 was combined with <br /> monitoring well data from an adjacent site to infer ground water flow direction Ground water flow <br /> direction was inferred to be northeasterly with a gradient of 0 0012 ft/ft The flow direction is similar <br /> to that determined for previous monitoring events Figure 4 - Ground Water Elevation depicts the <br /> contours for September 1999 The gradient map was expanded to include data from monitoring wells <br /> located at 3535 East Cherokee Road <br /> • <br />' Advanced GeoEnvlronmental,Inc <br />