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APR-22-1997 16:54 FROM GEOLOGICAL TECHNICS TO <br /> 4640138 �'.Uq <br /> �( Rd-) L Page 3 <br /> Addendum as 4/9197 Work Plan <br /> Pmmt No.251.3 <br /> April 21,1997 <br /> • Sample Collection Equipment-Samples we collected by sitachin a one liter Tedlar Bag W a <br /> hand pump by a length of clean poly tubing. The hand pump is then attached to the Dose <br /> barb or copper tubing by another length of poly tubing. The Tedlar Bag is then opened and <br /> filled by actuating the hand pump. <br /> • Sampling Procedure - samples of both influent and effluent vapor-streaLiis will be collected <br /> on a bimonthly basis. Once a month those samples will be submitted, by overnight courier, <br /> to Sequoia Analytical in Sacramento, CA for BTEX, TPH-Gas and MTBE analysts. The <br /> other colleMd sam=ples will be field screened on site with a organic vapor meter. The OVM <br /> is a field portable phom ionization detector that uses a 10.0 eV lamp to detect compounds <br /> with ioniza=tion potential below 10.0 eV (hydrocarbon range). During each sampling event <br /> the other parameters mentioned above,i.e. airspeed, ternpemtu rre, etre., will also be measured <br /> and recorded in a log]nook kept on site. <br /> 5.0 Flow Control Vahgm <br /> Schedule 4€1 PVC ball valves will be used for making flow adjustments at the air recharge wells <br /> and Between the extraction well and the TO unit. A length of PVC piping will extend above the <br /> valves on the rechMe wells allowing for the addition of the PVC caps fitted with hose barbs so <br /> vacuum iiie airements may be taken. <br /> 6.0 Notifimtion of Field Work and Sampling <br /> San Joaquin County PHS/EHU will be notified 4$ hours in advance of any construction, <br /> sampling,startup or field work. <br /> 7.0 Baring Applications <br /> An application for the installation of soil borings/well installation will be submitted with the <br /> proper fees prior to the start of any field work. <br /> Respectfully Submitted, <br /> TZOLOG2CgL IWO005 2W. <br /> \-\� Y <br /> J. <br /> q�j <br /> Raynold 1.Kablanow II,Pb-D. <br /> RG#5234 <br /> HO#442 <br /> cc: Mr.Michael D.McGranahran-Trustee in Bankruptcy <br /> Ms Elizabeth Thayer-CRWQCBCVR <br /> Mr. Steve Marquez-USTCFP <br /> TOTAL P.@4 <br />