|
I
<br /> jI
<br /> As requested the following {.cork plan addresses the items of
<br /> concern as outlined in the April 18, 1991 letter from SJC-FIID,
<br /> r items 1 through 4.
<br /> !� VARIFICATION SAMPLING OF TANK FIELD
<br /> Wege!?�proposes::to 'hand,-auger,-four.,.bcrings-to: the -11 '-foot "depths a, At
<br /> each-.side: wall:^:of:.:the.-t:ank�;:field, see Figure 3B. Depth to ground
<br /> Water for this site ranges from 11.7' to 12.9' at monitor well
<br /> MW1.
<br /> •Atv�.t�Ce-�=11� foat=�.depth�:afY.each:boring;, -,,sainpl�4- will-' be o� taied'to
<br /> i tap.-.,of,yground::,water, and field screened for total volatile organic
<br /> vapors using a HNu photoionizing detector with a 10.2 electors volt
<br /> bulb. The: sample._.::�xhibiting:rtha high�:st4 respa�; 'froio the `j F3�tu�
<br /> - wl.l;�bc�*.captained i:n�a z"�_x :8"`%brasa�:asl�seve,-�appi=.w�:th=-a,ti�i�.�um
<br /> ' foiltaand _plastic:end caps,, thatw .11 lie �e�1'ed :with .duck ' :taggy
<br /> labeled with•:saau3ple::ID#. ; ime; sampled; ".date 'a�►mpI eco end=-arse]yetis
<br /> to .r,te run. Tkaeample will tlzen>
<br /> be,,placed:<in•:a-Zip-Locfi� lsa€gie
<br /> sealed; aril p 'acedr'on '.ce `xn "a-ccolerµ:andstransported that"�day,,taF
<br /> CheaAtech-<, ►nalyticalr.Laboratories,(DHS#,x:359) for analysis of Tonal
<br /> Petroleum Hydrocarbons Gas (TPH G) using GC FID (5030) and BTEX
<br /> using method 8020 as shown on Table #2, page 17 of Tri-Regional
<br /> Board Staff Recommendation August lo, 1990.
<br /> i1
<br /> J
<br /> .j VARIFICATION SAMPLING FOR LEAD AT WASTE OIL EXCAVATED AREA
<br /> s.am le ,-borin g p g•at the;mooth-�• end of -the.,
<br /> former"Waste oilrtank-'backfill' to the'"eight `feet depth and obtaih
<br /> g"=sampl 'far total°�,-and.t,,soluble%.lead. Also-a xsample boring,,Will
<br /> ' be + heed a+i;gered:;at the southwest corner o!' the `property •to th'e ' .g
<br /> =foots d�pthr'to"obtain`a ackgroiin" `j a;�plp 'Eor anaZys�s of =total° and
<br /> soluble-t:lead;,,using method 7421.
<br /> VARIFTCATION OF CONTAMINANT FREE GROUND WATER CONTALMINANT FREE
<br /> DOWN GRADIENT OF TANK FIELD.
<br /> well .(MW4)= will be'-placed northeast of _: the.
<br /> tank-field, developed-arid, sampled.,:fore-TPH,G,-and: BTEX. At the
<br /> time the sample :t,s obtained monitor wells MWI, MW2 and MW3 will be
<br /> gauged for depth• to ground water, along with the newly installed
<br /> MW4. if-laboratory =-analysis:.... indicates.:-.that::,;the.. .:ground,,.water,
<br /> sc�mp3.ed,.;,:fraia:- HW 4 _-:::contaminant••free,-F a-request..to destroy--,all
<br /> <four,,.morzi,tor, �rel.ls,::will�be.;presented.;
<br /> WELL CONSTRUCTION
<br /> ,. The well will be drilled under western Geb-Engineers C-57 drilling
<br /> contractors license {513857} using a hand auger with a 7.5"
<br /> page2
<br />
|