Laserfiche WebLink
' 07 December 1998 <br /> AGE-NC Project No 95-0105 <br /> Page 2 of 5 <br /> ' 2 2 COLLECTION OF GROUND WATER SAMPLES <br /> Water samples were collected from each well using a new disposable plastic bailer Each water <br /> sample was transferred into three 40-ml VOA vials containing 0 5 ml of hydrochloric acid(18%) <br /> as a sample preservative and into one 1-liter amber bottle After collection, the samples were <br /> ' properly labeled, placed in a clulled container and transported under chain-of-custody to <br /> McCampbell Analytical, Inc (MAI) Each sample was analyzed in accordance <br /> ' EPA Method 8015m for total petroleum hydrocarbons quantified as gasoline and as diesel <br /> (TPH-g and TPH-d), <br /> EPA Method 8020 for volatile aromatic compounds (benzene, toluene, ethylbenzene and <br /> 1 total xylenes BTEX) and Methyl tertiary-butyl ether(MTBE), <br /> - EPA Method 8260 for volatile organic compounds (VOCs), and <br /> ' - EPA Method 8260m for di-isopropyl ether(RIPE),ethyl tertiary butyl ether(ETBE),methyl <br /> tertiary butyl ether(MTBE),tertiary amyl methyl ether (TAME) and tertiary butyl alcohol <br /> '. (TBA) <br /> ' 23 WELL ABANDONMENT <br /> ' In preparation for road surface improvements and widening of Grant Line Road on the northern edge <br /> of the site, two ground water monitoring wells were removed at the request of the PHS-EHD <br /> ' Destruction of two wells was performed 13 July 1998 by Soils Exploration Services of Sacramento <br /> Well MW-5 was filled with portland cement, pressure of approximately 5 psi was applied to the <br /> well for approximately two minutes to ensure grout penetration into the filter pack Monitoring well <br /> ' MW-4 was over-drilled to a depth of approximately 10 feet below surface grade (bsg) The boring <br /> was backfilled with portland cement A concrete pad was then installed to match the surrounding <br /> surface Ms Carol Oz of the PHS-EHD observed the abandonment activities <br /> 1 <br /> 3.0. FINDINGS <br /> I ' <br /> Ground water was inferred to be flowing wing toward the northwest, and contained significant <br /> hydrocarbon concentrations were detected only in the ground water sample collected from <br /> ' monitoring well MW4 Minor concentrations of petroleum hydrocarbons were detected in the ground <br /> • water sample collected from MW3 <br /> ' Advanced GeoEnnronmental,Inc. <br /> 1 <br />