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0,6/25/2001 15 00 20946711AGE STOCKTON PAGE 02 <br /> California _ : 0 <br /> Water Quality t � t '� a� <br /> - Central �Vai�ey Rep-on <br /> �,W1UxWa a Hick= Rubext Schneider,Chair <br /> Secretary far Gra bavw <br /> tt°i <br /> �nvtror�r 5acramenta i1sn oce y <br /> IaLernet Addte� i��-rwq rrr�vdrnar <br /> Pratecuox 3443 Rnuncr Itt�J/www sv�h ca, / cbS <br /> goad.Suete A.Sactmetlto,Cal =Ig 95827-30o9 <br /> PhEMC(916)255-3000•FAX(91 255-30IS <br /> 2 March 2001 <br /> Mar Jeffrey Wong RECEIVED <br /> SemOr Registered Envzromm=tal Health Specialist <br /> San Jaaqum County EnvzronzzzeuW Hcalth Divasion MAR 0 q 2001 <br /> 304 East weber-Avenue <br /> Stockton, CA. 95202 <br /> I <br /> "QU.rRENE"FOR INTERIB1 REMFDL4.UON,RA.VV .4T.E'X CAR WASH <br /> 420 "ST YYOSEMM AVENUE,MAN7EC,4, S'AN.T0-AQU27Y COUA7 p <br /> I <br /> During our 28 February 2401 meeting, we discussed the Cone Pene&0meter Tesr7ng Srte 1'nvertxgatzan, <br /> 1~'MW-4,r�rth Quarter 2000 and fire January 2001 draft sampling results for maxutor�wells <br /> MW-I through <br /> M -4, both submitted by Advanced GeoEnvuronmental (AGE), Groundwater samples collected from <br /> on-site naOnitormg wells M January 2007 contained up to 120,000 pg, <br /> /I TPHg, 9,900 <br /> 99/1 benzene; sUd <br /> 730,000 4911 MtBE The current depth to water in the on--We momtormg wells is about 17 feet bgs, and <br /> the reported groundwater flow Is uorth/northeast. Results of the depth-disc e <br /> collected from the toile penetrometer testing(CPT) borJugs at 130 feet show IVIt�3E at 39 pies <br /> Tetrachlomethylene and trichloroethylene also were idmufied in the groundwater samples at Tnwarmirn <br /> concentmt3op-s of 1,600 gg/J and 28 ug/l, respectyvely At this txcne, at is uncertaut where the source:of <br /> these solvents oixgtctated, and we are greatly concerned that the aquifer, which is used.for dotaestic a.-ad <br /> mumictpal water supply, has been ;mpacted- <br /> A.s ,presented iii AGE'4 8 September 2000 Sensrtrve Recepror Survey, two municipal water supply Wella <br /> are within 2,000 feet of Ralnwater Car Wash. One well (Almond Strcet Well) is about 1,900 feat <br /> northwest of the site and reportedly is cion-operational The atlaer well (Jessie Street Well), which is <br /> operational, is about 1,500 feet south of the site This well is cased to 100 feet and "open-hole"frim <br /> 100 to 325 feet The reported pumping rate for this well is 1,.100 gallons per zmriute <br /> AGE recommended in the CPT Site Investigation to install an mtenm remediattou systems to reduce <br /> Offs-site nigmtIon of the groundwater plume The system is appropriate to reduce content mass and <br /> control the lateral and vertical movement of contanmmted groundwater until the coxnpletxan of the site <br /> assessment. Therefore, require R-unwater Car Nash to complete the following <br /> • By 16 April 2001, Lustall and co>ahnuously operate an interim <br /> of the highest au-site P� and treat system in the ,�ez <br /> grauiidvvater contamination The system should remove product and <br /> stabihze the groundwater plume- <br /> California Enr&orimental Pratectwn AgeAcy <br /> Recycled Paper <br /> 1 nc enerer c-$rTe„gc ei 1R�E t 311fOrnia 5 regi vett' "�ltfarntsn needs to take Ymzneutare acnon a redtace crier <br /> nuc tt dude <br /> e ^iatia and Ui JatJI C�e1Yy 4(SIS Sea aur web-Bite at httPJ/rouwwawrCn CABYP nr i first if v mph sv, <br /> gnvinygcb� <br />