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05/13/97 09:41 MUD STOCKTON NO.973 903 <br /> U <br /> cart etfective approach to ckemrp. <br /> MwM*fhtg wells may need to be Installed as necessary beset on field measurements to detsnttllta full extant of groundwater <br /> Impact. ! .• <br /> AR work noted above shalt be cortrpietad,as beat as Ill ossIle,dufhtg one ntobltlaattim attempt. +y� <br /> *V40RK TO BE F9RR tMED <br /> h <br /> TASK t PLANNING AND PERMITS � - <br /> A. Prepare a proled worriplan. <br /> B. Prepare a site haenh and solely plan. <br /> C. Submittheworkplan,the health and safety plan,a schedule of Implameritabon,a permit to bora application <br /> and the ft"d*d$W W fee le Son Jasquin County Pulft HaW Serom,Cnvironrnental Health D?vlalon(PHS/EHD) <br /> for review. L <br /> TASK 2 SOIL BORING,MONITORING WELL,VAPOR EXTRACTION WELL INSTALLATION AND SAMPLIN13 <br /> A. Drill and swq*sufficient soil borings to determine the tun sAwd of the salt contatnindion En and around the areas <br /> rnentiO d above. At kod three of these sdl borings must be drilled and logged cortlfnuously. The read for addttoral <br /> soil borings shall be dshwmined in the lien,as much as possible,using either a flame Ionizing detector or a phyto <br /> ionizing detector(calibrated)and in consultation with PHSIEHD. <br /> 9, Dd1I, sample and complete as monitoring wells sufficient still borings to determine the full extent of grourAlwaterr <br /> ooh atthe ees. The need for additional monitoring wells shall be determined,as best"poseible.using field <br /> maters as described above,on Boll in the capillary fringe or the saturated zone and in Coneultatlon wth PHSIEHD. <br /> TASK 3 GROUNDWATER MONiTORINO WELL OEVELOPMENTISAMPLING <br /> A. A11 groundwater monitoring woes shall be developed suf6det ft to remove city Rnee from the well and to permit water <br /> Row through the splen se0ort of the well, <br /> B. Gmur#*Mer nevelt shalt be dslenriinsd in all walls prior to purging and also prior to sample collection. If a submerelole <br /> pump Is used for the purging,depth to water shah be monitored during the purging and concurrent With the coleation <br /> of the parameters discussed below. <br /> C. Groretdwster shall be cdtedW ftnm all the wells for analysis after:`suffiicierd granmdwaler Is purged from the well. The <br /> pw anretera of lemper*Pxe,pH,and oandLoMivily must be measured Coneumentryr with the purging of the wrens to indicate <br /> when repreeefrtsgve groundwater is entertry the well. Groundwater ehal:be sampled in ecowdmxe wcdh accepted <br /> Industry pract600s and aceording to PH5/1 HD guk inns. <br /> TASK4 LABORATORY ANALYSIS -„- r <br /> A. Suffic.-Isnt soil samples rural be analyzed In a Stats Certified lsbvrdM to fully Charectefte tiro concentration and <br /> dobution of the contami ants M the subsurface. The detecttorh limb used by the laboratrory span tx h►aocardamoe <br /> With <br /> All soil samples must be analyzed for the following conternownts: <br /> -total petroleum hydmwdwne,diesel GC-FID 315SOft301S <br /> -benzene,toluene,dvibenzene,xylene GC-Pel?5030r8M <br /> At kW one soll sample from each differing litharvgieal unit must be analyzed for organic carbon Content,porosity and <br /> bulk dere tyy. <br /> B. Groundwater samples shall be analyzed in a State Certified laboratory for total pelroteum hydrocarbons as desel and <br /> t?ert¢enit,toluene,ethylean ene,and xylene. <br /> TASK 5 CORRECTIVE ACTION PLAN PREPARATION <br /> A. Prepare.a technical report which documents the above noted aedVltes,avert analyi Niscuamm ft daft Collected. All <br /> deter shall bs praserAed In labular form. The concentrations and distribution of ccrdamlrwnta in the subsurface shell be <br /> presented 1n crosa-eWlons sho ing soil lithology, Contaminant concmtrstions and well locationsAxostructK n. <br /> Gracadwetsr elerdon corners and eanlaminant lsographs shall be included. The report shall also preset results <br /> dthe vapor e>�aetiat tsaamnilytasting conducted at the site.shun rd pfMethis rology techrcomPaJAtiv* <br /> and groundwater cleanup technology applicable to the alts and ahall present a Cleanup swam design for the ante <br /> hewing casts. <br /> TASKS QUARTERLY STATUS REPORT PREPARATION(IF NECESSARY) <br /> A. Ptepan a status report which shall inCM*the tabulated depth to water measurements and the analytical results ffom <br /> the sampling of the site wells.gradient and naw direction data,ocples of the laboratory report,field notes from the <br /> sampling teehnlelan,and the currant and vgmc ed status of tis site adivitiea. <br /> 2 <br /> . 4 1 <br />