Laserfiche WebLink
K-aU'Korn'� 'lexv'onal Water Quality Cor ' -)U Board <br /> Central ValleN Region <br /> ��N�; Robert Schneider. Chair <br /> / m.mu,m^ Arnold/, So,,^mmmMain 0�c 3, °,nu"'X0' <br /> /vo/1�""(enter Drive^sm.Rancho/wm"ucm.mm." vmnw/w o",,n= <br /> n"~,ww4w'ov/ 'FAX wm/-1^�4m5 <br /> Wil)''""" "mo/boards :,*"/Cunm;o^e\ <br /> 14 September 2006 <br /> Ms LucyThaker <br /> 1313 E Acarnpo Road V <br /> P.O. Box 437 <br /> �y <br /> Acannpo. California 85220 <br /> DOCUMENT REVIEW, FORMER TUCKER CONSTRUCTION, 336 EAST LOCUST STREET, LODI <br /> 8AyV JOAQ0N COUNTY <br /> | reviewed the Additional Site ASoeSn/n9nt, SVE Pilot Test and Aquifer Pump Test Report (Report). <br /> received 13 September 2006 by email and prepared on your behalf by your consultant Advanced <br /> GeoEnvirnnmenta|. Inc. (AGE). The Report documents the results of a soil vapor extraction (SVE) pilot <br /> study. o groundwater monitoring well (K8\8-1) pumping test, and three additional borings for SOU and <br /> grab groundwater samples taken to define the vertical and lateral extent of the petroleum hydrocarbons <br /> benea{ii your property at 336 Locust Street in Lodi (Figure 2) in July 2000 <br /> Grouncvvater was encountered at 50 feet below ground surface (bga) in all borings. Soil from the <br /> borinQc was sampled at the following dap1hs� 10. 20. 25, 30. 35. 45. and 55 feet bgo Table 1 below <br /> shows hat soil contamination was only detected in boring 131 in the Underground Storage Tank (UST) <br /> area in samples taken at 25. 30 and 35 feet bgs (' bgo). <br /> --D-e-pt h— TP Benzene Toluene <br /> 1 — Total Petroleum Hydrocarbons as gasoline 2— 1,2-Dichloroethane <br /> 3 - all so I concentrations in milligrams per kilogram <br /> The ve1ico| and lateral extent of soil contamination is defined by the investigations conducted to date <br /> (Figure 3) The lateral extent of QrOundvvot8[ pollution is defined to the vYeSt, north and south. <br /> However the eastern lateral extent (Figure 6) of the groundwater plume was not defined by the grab <br /> groundwater sample analysis in boring B'3, which reported TPHg (220 pg/L). Toluene (13 pg/L). and <br /> Xylenes (87 pg/L) <br /> The SVE pilot study was conducted from a single SVE well that in located adjacent to the UST area <br /> and screened above the saturated zone from 10 to 50 feet bgO. The 8VE Radius of Influence was <br /> Ca|Cu|3�ed aS1OO feet /Figure 4\. Field analysis (Photo Ionization Detector, or P|[>) of soil vapor from <br /> the OVE well nhOvv8U a reasonably consistent level /530 to 630 parts per million by volume) of total <br /> organic compounds detected over the seven hour test. Soil vapor 3n@|yoie by U8EPA Method 8260B <br /> from a abora\ory confirmed the PID readings on petroleum hydvocarhons, and quantified the nnoxirnunn <br /> concentrations of the o0i| vapor as: TPHg (3.000 pg/L). Benzene (9 pg/L), Toluene (74 pg/L). <br /> Ethy|benzenc (17 pg/L), and Xylenes /78 pg/L). The Report concluded that 8\/E is an effective <br /> remedial alternative for patro|8Unn hydrocarbon contamination in soil. <br /> A seve-i hour step drawdown groundwater pumping heSj of MVV-1 began at a O0vv rote of 2 gallons per <br /> minute (gp/n), was increased to 3 gpnn after 3 hours, and to 4 gpnl oM8r 2 additional hours. At seven <br /> California £),/ir*nmental Protection Agency <br /> `~ Recycled Paper <br />