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1 <br /> 1 <br /> r , I <br /> ' ' t <br /> 18 May 2005 ti <br /> i AGE-NC Project No 03-1100 <br /> , r <br /> Page 2 of 4 <br /> 0'5 ml 18%hydrochloric acid solution as a sample preservative After collection,the samples were <br />' properly labeled, placed in a chilled container, and transported under chain of custody to Cal Tech <br /> Environmental Laboratories, Inc (CTEL) for analysis The samples were analyzed for <br /> • Total petroleum hydrocarbons quantified,as gasoline (TPH,g) in accordance with EPA <br /> Method 8015 Modified, <br />' Benzene, toluene, ethylbenzene, and xylenes (BTEX) In accordance with EPA Method <br /> 8260B, and <br /> I I _ I <br />' 0 Fuel oxygenates methyl` tertiary-butyl ether (MTBE), di-Isopropyl ether (DIPE), ethyl <br /> tertiary-butyl ether(ETBE),tertiary-amyl methyl ether(TAME),tertiary butanol(TBA), 1,2- <br /> dichloroetliane(1,2-DCA),and ethylene dibromide(EDB)in acco'rdarice'with EPA Method ` <br />' 8266B 1 r <br />' 2 3 WASTE DISPOSAL <br /> ,I , <br />� . On 05 January 2005, approximately 340 gallons of non-hazardous purge water, generated during <br /> previous ground water monitoring events, were removed from the site Also 15 drums (55-gallon <br /> drums) filled with non-hazardous soil generated during previous monitoring well installation <br /> activities were removed from the site and 'disposed of at Western Environmental In Mecca, <br /> California Transportation and disposal was completed by Slaby Sales of Borrego Springs, <br /> California Copies of the waste disposal manifests are Included in Appendix B <br /> 3.0. FINDINGS 4 <br /> Ground Water'elevation, flow direction, and gradient were determined from field data collected on <br /> 07 February 2005 The contaminant impact to ground water was quantified by laboratory analytical <br />' data <br /> y 5 <br />-- ___ _ �- _— -_....-. �- w-'--^-F--1•-••ter- -s ..._..-.,._..- .«+.- _ r -.._- « , � _ -. -.«-.._r - .'.- z _ ,,. ...T «. _ _ <br /> 3 1 GROUNDWATER GRADIENT AND`FLOW DIRECTION <br /> Y , <br /> At the time of the February 2005 sampling event;depths to ground water ranged from 43 60 feet to <br /> 44 92 feet below the tops of the well casings `During this monitoring event,the ground water level <br /> in the wells was approximately,l3 60 feet to 14 92 feet below the tops of the well screens,indicating <br />' that the'wells are screened properly and yield representative shallow ground water samples <br /> Ground water elevation at,the site ranged from 24 14 feet below mean sea,level;(MSL) in well <br /> i Advanced GeoEnvironmeatal,Inc <br /> 1 <br /> r I I 1 1 <br /> I <br /> I 1 <br /> 1 ' <br />