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TABLE 'I - CHECKLIST OF REQUIRED DATA
<br /> FOR NO FURTHER ACTION REQUESTS AT UNDERGROUND TANK SITES
<br /> Site Name and Location: Frank's Exxon#4, 14800 W. Frontage Road (Hwy.99), Manteca, San Joaquin
<br /> NO,, 1. Distance to production wells for municipal, domestic, agriculture, industry domestic wells one on-site and another
<br /> and other uses within 2000 feet of the site; approx. 100 ft downgradient from site both
<br /> have been impacted. New well 400 ft TD.
<br /> f� Removed three 10,000 gal
<br /> �i •• ,, 2. o scale, c win 1 ion r and existing tank systems. tanks and associated piping
<br /> excavation contours and sample ri locations, boring and monitoring well elevationr4pjQgrm 11/89. Replaced two 10,000-
<br /> gradients, n nearby surface waters, in s and subsurface utilities;
<br /> gal and one 8,000 gal tanks
<br /> 0 3. Figures depicting lithology(cross section), treatment system diagrams; Borings
<br /> 0 4. Stockpiled soil remaining on-2ft on-2ior off-site disposal(quantity); aerated and used for grading. Soil and development
<br /> water from MW-9 disposed off-site.
<br />,Y4 .5. Monitoring wells remaining on-site, fate; 9 monitoring wells,4 soil borings TD 25 ft, 2 Recovery wells
<br /> j6. Tabulated results of all groundwater elevations and depths to water 20.95 to 34.56 ft bgs
<br /> El7.Tabulated results of all sampling and analyses:
<br /> ❑Y Detection limits for confirmation sampling
<br /> �N Lead analyses
<br /> 8. Concentration contours of contaminants found and those remaining in soil Soil:tank pit to VB-2&25 ft bgs 7.2 mg/kg
<br /> TPH 0.0017 mg/kg 1,2 DCA. GW:MW-1
<br /> and groundwater, and both on-site and off-site:
<br /> -g,
<br /> y Lateral and 0 Vertical extent of soil contamination to site boundary&4fi ft(max.-5.7µg/11,2
<br /> DCA, 16µg/l MTBE, 610µg/!TPH-d,59;4911
<br /> L'J Lateral and � Vertical extent of groundwater contamination TPH-g, 0.72µg/1 Toluene&2.7µg/1 Xylene
<br /> YJ 9. Zone of influence calculated and assumptions used for subsurface 7/91 Aquifer test, 10/92 Soil vent test
<br /> remediation system and the zone of capture attained for the soil and
<br /> groundwater remediation system;
<br /> 10.Reports/information YY Unauthorized Release Form 8/23/88 QMRs(Dates) .4/92 to 11/97
<br /> Y❑ Well and boring logs a PAR 7/14/90E] FRP 3/22193 a Other(report name) Closure 12/11/97
<br /> Ya 11.Best Available Technology(BAT) used or an explanation for not using BAT,' Removed tanks and excavated soil,5VE
<br /> �-�*.- �--wand Water Treatment 4195 to 94196 .... -
<br /> 0 12.Reasons why background wasfis unattainable using BAT, Removed contamination to asymptotic conditions,further
<br /> remediation not feasible
<br /> I Q 13.Mass balance calculation of substance treated versus that remaining;
<br /> 0 14.Assumptions, parameters, calculations and model used in risk
<br /> Need model to determine that the iemaining
<br /> assessments, and fate and transport modeling; contamination will not impact domestic wells above
<br /> MCLS for 1,2 DCA
<br /> 15.Rationale why conditions remaining at site will not adversely see above comment No documentation that
<br /> impact water quality, health, or other beneficial uses;and contamination will not impact owner's well and domestic
<br /> well at the trailer park
<br /> 0 16.WET or TCLP results 0.0017 mg/kg 1,2 DCA in soil
<br /> By Comments:Soil bottom of tank pit(17 ft bgs) to VB-2 at 20 ft bgs 7.2 mg/kg TPH-g and at 25 ft bgs 0.0017
<br /> mg/kg 1,2 DCA. In 1997, maximum contaminants in ground water.40 to 49 ft bgs 5.7µg/1 1,2 DCA, 16/43 ug/1
<br /> Dat MTBE(8260/8020),610µ9/1 TPH-d, 59µg/I TPH-g, 0.72µg/!Toluene,2.7µg/1 xylene. Domestic wells:DM-1
<br /> -3
<br /> nondetect far petroleum contaminants. DM-2 62µg/l TPH-g,2.0µg/11,2 ACA, & 10µg/1 MTBE
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