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<br /> TABLE I - CHECKLIST OF REQUIRED DAL
<br /> FOR NO FURTHER,ACTION REQUESTS AT UNDERGROUND TANK SITES
<br /> Name and Location: Jahant Food and Fuel,24323 Highway 99,Acampo,San Joaquin County
<br /> 1;Distance to production wells for municipal,domestic,agriculture, A well survey In 2003 shows no municipal supply wells
<br /> industry and other uses within 2000 feet of the site; and IS private wells located within 2000 feet of the
<br /> site. Besides an onsite private well for the truck stop,
<br /> there is one private well 800'east and one private well
<br /> 900 feet south..
<br /> Z:Sfte maps, to scale, of area impacted showing locations of tormer and existing tank Two 10,000-gallon and one
<br /> LLJ excavation contours and sample locations, boring and monitoring well elevation 5,000-gallon unleaded gasoline
<br /> contours,,gradients,and nearby surface waters,buildin US Ts were removed in January
<br /> gs,streets, and subsurface utilities,
<br /> 1998.
<br /> FigurOsdepicting lithology(crass section),treatment system diagrams;
<br /> Site lithology consists of clay,silt,and fine sand
<br /> to 87 feet, the total depth investigated.
<br /> 1 1 4k
<br /> St ,pileds il disposed aft-site.(guantity);.
<br /> Approximately 200 cubic yards of excavated soil was aerated onsite W
<br /> 9 to 10 months,tested,and spread onsite.
<br /> M6Rt3hnJ--W9 i ig on-site,-fate;- 1
<br /> ur;lonitor ng we�s�MW�throug�,MW4Thave"been�tnslalled for this
<br /> Investigation. The wells will be properly destroyed pending'site olosure.:
<br /> Y 6"TAbLoted.reouft:Of 611 g rek.Vatidns and depths to water,"
<br /> The depth to water varied from 73 to 80 M64%sold
<br /> the groundwater flow direction is.to then orthwast
<br /> �Z Tabulated results:otall sampfing::an danalyses., P beto, _overexcavation In 1998,TPH9(7,000 m9l.kq)T-b#h2s06�
<br /> (34Vk m I )and ME(1,30 Mglkg)were detected in*01 Only MtBE
<br /> a
<br /> DeloctionAift for Confirmation swvft (2.4 pg/L)was detected in groundwater in 6/01. After ri101,no:.
<br /> Ld d"O"t. petroleum hydrocarbon constituents were.detected In.9roundwaten
<br /> foundond those remaining in soil
<br /> rl groundwater;froth ren- ' and ofi`site: The extent otconfamination:.Is.,.dot7iied%bv
<br /> Y Lateral and un-site 0~4ndmonit d.di 11,
<br /> nt of soil contamination ng
<br /> Lateral and tyeriical extent of groundwater contamination
<br /> 9.Zone ofinfluendedgkolatedendaSsur tions:used for subsurface
<br /> L;_..1 9.
<br /> system. iandih.e..zone:o.t.capture attained. I 11 for the soil and An."000"d Apt"ty""t:Oqdlrodm.
<br /> groundwaWromediation s
<br /> �Mauthodzed Release 10.Reports.linformation ase Form QMRs(10198 to 12102)
<br /> Y Boring logs17 (No Further Action Request Report,3103)
<br /> " . SIR r 1FRP
<br /> PY-1 11.Best A
<br /> vall ble Tech USTs,,.gW 00000i and pa.to..
<br /> rrology e8A 7)used pran explanation for not using BAT, Remove
<br /> attenuation.
<br /> FY-1 4�2.'Reasons voy background wasps
<br /> Decreasing concentrations have--been-sitained4i-allmonitoriiyg we11S.:;M7n0r___.
<br /> soil contamination remains on-site.
<br /> FY-1 13.Mass balance calculation otsubstence
<br /> ,treated yorto th#tfemarriirrg;: Approximately 166 gallons of TPHg,0.098 gallons of benzene, and 0.01 gallons
<br /> of MWE remain in soil.
<br /> lk Assumptions,parameters, calculations and model used In risk
<br /> L J 40essm dfia fi*�On L dL A risk assessment was-not required.
<br /> I T I 1 1 5. Rationale why cond.i.tions:ir.emaMfi?g at site will not adversely Sol/contamination is limitedin extent,and based on ten
<br /> impact water quality,-health,or other beneficial uses. sampling events, contamination is not continuing to
<br /> leach to groundwater.
<br /> By, Comments. Two 10,000-gallon, and one 5,000-gallon gasoline USTs were removed from the subject site in January
<br /> JLB 1998. Soil contamination was identified at the gasoline USTs area,piping,and dispensers. Multiple borings, one
<br /> groundwater grab sample,and four monitoring wells were completed to delineate and monitor contamination at this site.
<br /> Date- In 2198,additional soil.was.excavated. Stockpiles were aerated, tested,and spread onsite. Monitoring wells MW-1
<br /> through MW-3 were sampled from 9100 to 12`02;MW-4 was sampled from 12/01 to 12/02. In I21(12,groundwater
<br /> contaminant cohicentnitionS:declined to<50 ligIL for TPHg, <0.5,uglL for benzene, and<0.5 ligit forMIBE, Additionally,
<br /> th_Minor
<br /> 10/1"3: oil
<br /> quarterly,sampfingfram Igpa�Lto 2002 of the onsite private well detected no contaminants. Based a
<br /> :contamination and a lack of contaminant concentrations in groundwater, Regional Board staff concur with San:Joaqufff
<br /> County's Closure Recommendatlo'n.L
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