Laserfiche WebLink
i <br /> I , 03 January 2005 <br /> AGE-NC Project No 95-0142 ;r <br />' 2 of 6 <br /> 'Pages <br /> ' Effluent SVE streams soil-vapor samples were collected on 16 September, 25, 27 and 28 October,, <br /> and 03 November 2004 The soil-vapor samples were collected in Tedlar vapor bags using a vacuum u„ <br /> pump attached to the SVE effluent stream The samples were labeled,placed m a pre-chilled cooler <br /> and trarisported under chain of custody to McCarripbell Analytical, Inc (MAI) The samples were <br />' analyzed for z <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br />' Method 8015 Modified, and ' <br /> • Volatile'aromatic hydrocarbons benzene, toluene, ethylbenzene and total xylenes (BTEX) <br />' and methyl tertiary butyl ether (MTBE) in accordance with EPA Method 8020 <br /> I., <br /> 1 22 GROUND WATER TREATMENT OPERATION <br /> The ground water treatment system Is designed to operate at a maximum flow rate of up to <br /> 10 gallons per minute(GPM) Ground water is extracted from the primary extraction well EW-1 at <br /> a flow rate of approximately 3 GPM, in addition,ground water is also being extracted from the deep- <br /> "screened casing of dual-completed vapor wells VW-1 and VW-3, at a maximum flow rate of <br /> 125 GPM <br /> The ground water treatment system operates on a batch basis, once the holding tank fills'with ' <br /> " `sufficient water, approximately 75 gallons of extracted ground water are treated and discharged ' <br />' Since only 14,000 gallons of treated water(effluent)maybe discharged daily to the City of Stockton <br /> sewer system, the effluent discharge was adjusted at a flow rate not to exceed 10 GPM ' <br /> 1, <br /> In order,to verify and,quantify the mass of contamination from each extraction well and to comply �r <br />' with the requirements of the City ofStockton dtschargerpermlt, monthly monitoring and sampling <br /> of influent and effluent ground water was performed on'16 September,r25, 27 and 28 October, and <br /> 12 November 2004 The samples were collected' in laboratory-supplied 40-milliliter (ml) <br /> Environmental Protection Agency(EPA)-approved volatile organie analysis(VOA)vials containing <br /> 0 5 ml 18%hydrochlonc acid as a preservative and 1-liter amber bottles without preservative, and <br /> then labeled with the sample designation, date, time, and sampler's initials The labeled samples <br />' were logged on a chain of custody form, placed in a chilled container'acid transported to MAI, a <br /> California Department ofHealth Services(DHS)-certified laboratory,for analysis The samples were <br />' analyzed for <br /> • TPH-g and TPH-d (diesel) - effluent by EPA Method 8015 Modified, I ; <br /> • BTEX in accordance with EPA 8260B,, <br /> I s { <br /> s a <br /> Advanced GeoEnviranmental,Inc <br /> I ' <br /> I <br /> + 1, <br />