ARCHIVED REPORTS_XR0009850 - Laserfiche WebLink

Home Browse Search

borings at locations shown on Exhibit A, tale samples as necessary for laboratory analysis, and con, ert them to groundwater monitoring wells. This worF should assist in defining the lateral e•,tent of the contamination , and aeter-mine whether or not the groundwater at this locatzan has been degraded. The workplan which follows is mor the purpose of accomplishing that task. WORKPLAN FOR PLACING FOUR 4" DIAMETER GROUNDWATER MONITORING WELLS AT 1500 SHAW ROAD. 1 . Osterberg & Stewart auger drilling equipment will oe used, the drilling permit is still valid. Eacn boring ve advanced using 10 1/4" OD hollow steps auger ti-lights: thev will be cleaned between ,Wells to avoid the possibility of cross-contamination. 2. The r n g will be equipped with ei tner a standard Cali €orna a Modified split-spoon sampler , or wireline operated continuo-s cars,g equipment designed to hold clean 2 ' or 2. 5" mazal tubes, for obtaining soil samples. T. Care samples will be screeners as nece_sary witn a proper_ y calibrated PID meter, and at least one ( 1 ) sample .will be preserved. at 5 ' depths from 10 fleet to as close to the aop of the water table as possible. 4. Each preserved sample will be briefly describes, promptly sealed, labeled, and placed on ice pending transport to PGL laboratory for analysis. At the completion of operations, the soil samples will be transferred under proper chair of custod7f to the laboratory, with instructions to analvwe for PTEX, tilde:had 8020, ) and TPH--G, (Methods 5070/8015M. ) 5. Drill spoils will be placed in metal drums, properly identi- fied , and stored on site pending results of laboratory analysis. a. Each Soil saori ng will be advanced a minimum of 10 f Eet be; o„4, the ,water table, s..hich is estimated to be about 80 ' hg:. After completion of augerxng operations, 4" DD . screw-type, inttirnal flush , blank and slotted SCH 40 casing will be installed, grave). packed, sealed and grouted as shown on the attached schematic , E'h1 bx t G. The top of the perforations will exteno a minimum of 5 ' above the water table, and 10+ feet below. 7. Each well will be equipped with a preformed s,rface mault, thoroughly cemented rn place, and a suitable reavy dui / locking traffic cower. The casing will a%tend far enough up into the vault to allow placement of an ehpandable cap °, lock assembly , The top of each casing will be notched on the north sine to facilitate measurements. Each well cover will be clearly