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SGS <br /> 2 <br /> Color Spot Lodi, Inc. <br /> March 28, 1989 <br /> SGD plans to conduct a phased <br /> Because the exact nature not lateral and vertical extent of <br /> subsurface contamination at the site is is described herein, includes conducting <br /> site assessment. The first p general nature and lateral and vertical <br /> a soil vapor_ survey to evaluate the <br /> �� phase soil boring/monitoring well <br /> extent o£ contamination in the excavation arca. The results o£ this survey will <br /> be used to identify locations for the following ite assessment <br /> program to be conducted at em a al d� Oafternly complete <br /> tionpla bedevelopedandsimplemented. <br /> is completed can a proper r <br /> TASK 1 - PROJECT MANAGE14ENT <br /> Coordinate with app <br /> l. regulatory agencies in implementing the <br /> assessment of the UST soils and potential ground water contamination• The soils <br /> contamination will be the jurisdiction of the EHD and requires the submittal of <br /> ior to initiating the field studies. <br /> this technical work plan for approval pr <br /> TASK 2 - SOIL VAPOR SURVEY <br /> Install a series (approximately 25 to 30) of temporary oil vapor <br /> sam lin probes in e soil <br /> the subsurface aate3d htdrocarbons.-acavaen objective anal�zof dt�a <br /> vapo for the presence of fuel-rel y <br /> survey is to evaluate the lateral migration orlfocationuel-relausang field contaminantsand <br /> quantify the contaminants at each sampling <br /> devices. robe, <br /> A 5/8-inch outside diameter, hollow, stainless steel sampling p <br /> will be driven into the subsurface to <br /> with a slotted section on the lower end, <br /> subsurface conditions at the site 1"fOv <br /> The exp <br /> l�Gu`).� a depth to be detexmined__on-site., the UST <br /> est that soil vapor samples will be collected between rid and depth. <br /> suggest <br /> The sampling locations will be based on a regular gation i.s widespread, the <br /> excavation using 10-foot centers. If the lateral o f is i <br /> grid may have to be stretchedt�h10-�sk centers obesfwill be installed by being <br /> Th <br /> the time allotted to accomplish <br /> driven with a slide hammer. throu h <br /> A vacuum gauge and <br /> The soil vapor sample will be drawn from the subsurface up g <br /> robe using a peristaltic Pump- using Teflon <br /> the hollow soil vapor p is used to monitor <br /> injection port are connected in series with the peristaltic pump <br /> ie eel slots often become plugged) and the injection port <br /> tubing and stainless steel attachments. The vacuum gauge <br /> blockage of the samp (• ort using a gas- <br /> is used to retrieve the sample. ,llectedafromlthe allow <br /> pie s g routed <br /> through the PIA. A sample is GC-PIA) for <br /> portable as chromatograph ( and total <br /> ---- �cted into a P g x l.ene-_(BTEX), <br /> _fight microsyringe-and_in3� _- _ ;-.- ----- --: <br /> analyses for benzene, toluene, ethylbenzene- and and diesel fuel. <br /> volatile petroleum hydrocarbons (TVPH) for both gasoline <br />