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BLE 1 -CHECKLIST OF REQUIRED DATA�% I
<br /> FOR NO FURTHER ACTION REQUESTS AT UNDERGROUND TANK SITES
<br /> Site Name and Location: Former Manna Pro Corp.,4004 S.EI Dorado St,Stockton,San Joaquin County(RB#390527)
<br /> 1. Distance to production-wells for municipal,domestic,agriculture, A 2000 sensitive receptor survey reported one water
<br /> industry and other uses within 2000 feet of the site. supply well within 2,000'of the site(1000'to south).
<br /> The well Is not threatened by this release.
<br /> Z Site maps, to scale, of area impacted showing locations of any In 5-90,one 5,000-Ballon diesel, two 10,000-gallon
<br /> former and existing tank systems, excavation contours and sample diesel,one 5,000-gallon gasoline,and two 10,000-
<br /> locations, boring and monifonng well elevation contours,gradients, gallon gasoline and diesel USTs was removed.
<br /> and nearby surface waters, buildings, streets, and subsurface One 6,000-gallon diesel UST was closed/n place In
<br /> utilities' 100.
<br /> 3.Figures depicfing lithology(cross section), treatment system Site lithology consists of clay,slit,and sand to 97',
<br /> di the total depth Investigated.
<br /> 4.Stockpiled soil remaining on-site or off-site disposal approximately 2,700 y excavated soil was treated onsite and
<br /> u reused.
<br /> YJ 5. Monitoring wells remaining on-site, fate; Sixteen(16)monitoring wells(AfW--1 through MW-10,MW--11D, 08-1 through
<br /> OB-5)and twenty two(22)treatment wells(VEW-1, YEW-9-1, YEW-A-2,
<br /> VEW-A-3 VEW-8-1 through YEW-84, VEW-C-1 through VEW-C-3, VEW-D-2,
<br /> VEW-0-3,ASW-9-1,ASW-A-2,ASW-A-3,ASW-B-1 through ASW-8-4,
<br /> ASW-C-2 and AS W-M will be oft dextro
<br /> 6. Tabulated results of all groundwater 22 bgs.ed-
<br /> Depth flow -
<br /> elevations and de ths'to water, direction was towards the northeast:
<br /> T. Tabulated results of all sampling All data adequately tabularized In various reports,Including closure report
<br /> and analyses:
<br /> QDetection limits for confirmation
<br /> sampling
<br /> nY Lead analyses
<br /> 8. Concentration contours of contaminants found and those remaining in soil and The extent of the identified
<br /> groundwater,and both on-site and off-site: contamination Is described in the
<br /> available reports.
<br /> U1 Lateral and 0 Vertical extent of soil contamination
<br /> 91 Lateral and FY1 Vertical extent of groundwater contamination
<br /> 9. Zone of influence calculated and assumptions used for subsurface remediation Over-excavation and SVE(AS were the
<br /> system and the zone of capture attained for the soil and groundwater remediation engineered roemedletion.
<br /> em
<br /> 10.Reports i information Y Unauthorized Release Form Y QMRs(74) 10.91 to 9-11
<br /> �y Well and boring logs Qy PAR 10 FRP My Other Closure Report(6-10);Closure Report Add.(1-12))
<br /> 11.Best Available Technology(BAT)used or an explanation for not using USTs removal, over-excavation,SVE/AS,and
<br /> BAT natural attenuation.
<br /> V 12. Reasons why background wasfrs unattainable Residual soil and groundwater contamination remains on-site. "
<br /> 13.Mass balance calculation of substance treated n al so�ss sstim"-ale was 27;600 lbsofTPhf; n�groundW ilei
<br /> versus that remaining; mass estimate was 453 Iba of TPH. Consultant estimated 1,600 lbs
<br /> TPH removed by over-excavation,and 22,000 lbs TPH removed by
<br /> SVFJAS.Approximately 41 lbs of TPH remain In groundwater and
<br /> 4,412 lbs TPH remain In soil.
<br /> 14. Assumptions,parameters, calculations and Sol/vapor was not measured.Soil results failed ESLs for gross
<br /> model used in risk assessments, and fate and contamination and direct contact(TPHg,benzene, toluene,
<br /> transport modeling; ethylbenzene,and xylenes)at 30'to 40'bps,below typical worker
<br /> dopth.Consultant states site does not re resent a sl nllilcant risk.
<br /> 15. Rationale why conditions remaining at site will Soil and groundwater contamination reportedly are limited Ip extent
<br /> not adversely impact water quality, health, or other Land use(Industrial)Is not expected to change in the foreseeable
<br /> beneficial uses•and future. TPH In groundwater Is estimated to reach WQGs In 17 years.
<br /> By: JL8 Comments.In 5-90, one 5,000-gallon diene/, two 10,000-gallon diesel,one 5,000-gallon gasoline,and two
<br /> 10,OOD-011on gasoline and diesel USTs were removed;and one 6,000-gallon diesel UST was closed In place
<br /> Date: In 10/90 at the subject site Res/dual soil and groundwater contamination remains on-site.Based upon the
<br /> 2/22/2012 !/mined extent of contamination reported in soil and groundwater,a stable groundwater plume with declining
<br /> concentrations,no foreseeable changes In future land use(Industrial),and minimal risks from$oil and
<br /> groundwater,Regional Board staff concur with San Joaquin County's Closure Recommendation.
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