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' TAI 1 -CHECKLIST OF REQUIRED eTA
<br /> FOR NO FURTHER ACTION REQUESTS AT UNDERGROUND TANK SITES
<br /> Site Name and Location: Former Beacon Station#696,900 S.Cherokee Lane,Lodi,San Joaquin County
<br /> FY-1 ladarm to production weds formunidpal,domestic,agriculture,industry and 1 murdelpal well 2,600 R and 1 domestic
<br /> other uses**M20100 feet of the sft , well 5,300 R.
<br /> a2' SO MM to scale of area ksmid2d showina locabons of fianer and existing tank&Uft= 16 tanks containing
<br /> excaiendw contours and sample locations,boring and alevation cantours. gasoline,diesel,and waste
<br /> oradrents. and ne ft cu//ace waters Wfldinac streets. and subsurface utilities; oil and unknown substances
<br /> were removed in 86 d 94.
<br /> 3• ,treatment system dfagramc
<br /> Q4. Stockpiled sal remaining on•Wb or off-sfte disposal(quanta); 2641 yd3 disposed at Ben's Truck and Equipment,Red
<br /> 0 5.Monitoring wells remaining on-site,fate, 32 monitoring wells and 5 soil vapor extraction(SVE)we//s need to be
<br /> destroyed, 7 SVE destroyed.
<br /> Q6. Tabulated results of all groundwater elevations and depths to water, 51 to 68-ft bgs
<br /> Q7.Tabulated results of ap sampling and
<br /> analyses—Defection limits for confirmation sampling
<br /> HN Lead analyses
<br /> 0 8. Concentration contours of contaminants found and those remaining in soft
<br /> and groundwater,and both ar-fte.
<br /> RY Lateral and 0Vertical extent of soil contamination
<br /> Y Lateral and a Vertical extent of groundwater contamination
<br /> Y� 9.Zone of influence calculated and assumptions used for subsurface Recovery Wells removed 194 gallons of
<br /> remediation system and the zone of capture attained for the soil and free pact,SVE removed 19,885 gallons
<br /> groundwater remediation system; petroleum hydrocarbons
<br /> 10.Reports/information Yo Unauthorized Release Form Ya QMRs(Dates) 6/20/97
<br /> 0 MY and boring logs a PAR EIFRP 4/27/95 (E Other(report name
<br /> Y� 11.Best Available Technology(BAl)used or an explanation for not using T. Tanks removed 86-94,removal of free
<br /> product 89-91,SVE 91 to 96
<br /> 0 12 Reasons wiry background wawft unattainable using BAT; 22,474 gallons of petroleum hydrocarbons have been
<br /> removed.
<br /> Q13.Mass balance calculation of substance heated versus that remaining; Rennining contamination. 4456 gallons TPH-d,
<br /> 2,000 gallons TPH-g,and 2.7 gallons benzene
<br /> 0 14.Assumptions,parameters,cakulat ms and model used in risk RBCA Tier 1 and 2
<br /> assessments,and fate and transport modeling;
<br /> 0 15.Rationale why conditions remak ft at sfte will not adversely Significant concentrations and quantity of contaminstion
<br /> impact water qualify,health,or other beneffdal uses;and remain,but there are no nearby drinking wells SVE has
<br /> reached asyrnpiodc levels for removal of contaminants.
<br /> Two small plumes onsite.
<br /> ® 16.WET or TCLP results
<br /> By Comments.Remaining Soil Contamination: 5,700 mg/kg TPH-g, 17,000 mg/kg TPH-d, 18 mg/kg benzene,
<br /> 74
<br /> 200 mg/kg toluene, 130 mg/kg ethylbenzene, 650 mg/kg xylene.
<br /> p Remaining Groundwater contamination:430µgJ1TPH-g,7,600 nn TPH-d, 5.8 pgA benzene, 8.1 µgA
<br /> /p toluene, 1.4 pgA ethyibenzene, 8 pgA xylene., and ND for MTBE
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