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s. <br /> W <br /> r� <br />�xm <br /> GROUNDWATER <br /> _---- TECHNOLOGY, INC. <br /> 1832 Trihulr kwr1.Suint G.SacramrnlO.Calif orniu 95615 19161 y'-l'1800 <br /> OIL RECOVERY SYSTEMS -- —ter <br /> !4 September 15 : 1987 <br /> Project Number 202/799-8221 <br /> Mr . Ken Olds <br /> Lammersville School District <br /> 16555 west Van Sostgn Road <br /> Tracy, CA 95375 <br /> RE: CgANG6 ORDER FOR INITIAL <br /> - <br /> SITE ASSESSMENT <br /> Dear Mr . Olds : <br /> This letter is to request a change order for the contract <br /> site assessment at the Lammersville School as <br /> covering initial <br /> ent to Mr . Olds , dated April 24 , <br /> contained in the Proposal s <br /> lggq , This change order is for additional work steps needed for, <br /> and to cover the cost of , the following items: <br /> ~ 1. Install two additional 2-inch diameter groundwater <br /> monitoring wells used to assess the subsurface <br /> hydrogeologic contaminant conditions at a cost of <br /> $2 ,000.00 each. <br /> 2. Laboratory analysis for two additional soil samples <br /> — taken from above stated wells at a cost Of $100 . 00 <br /> each. <br /> 3, o ' 'rm above sstated wellsatacost <br /> for two additional water <br /> Of $100 <br /> es <br /> t00 <br /> takeennfr <br /> each. <br /> g . One additional round of groundwater sampling and <br /> ' monitoring, required due to the presence of <br /> hydrogeologic contaminant evident in the monitoring <br /> We..l_ls_.,.,at- _a._total--Cos t- o.f__.3.5.00.0...... ._ <br /> rl.r,r:,.d, <br /> r:1. T..rnrnri r':I :47 - <br />