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• CHECKLIST OF REQUIRED DATA FOR NO FURTHER ACTION REQUESTS AT <br /> UNDERGROUND TANK SITES <br /> Souza II, LLC, 612 West I Vh Street, Tracy,California <br /> I Distance to production wells within 2,000 feet of the site Up to nine production wells were identified <br /> within 2,000 feet of the site Two wells are active Three wells have been destroyed water supply wells, <br /> and four wells have an unknown status None of the "unknown" wells could be located in the field <br /> during the area reconnaissance, consequently, they are presumed to be destroyed The closest active <br /> production well is approximately 1 155 feet south-south west (upgradient) of the site as depicted on the <br /> (of Figure in Attachment A See the Sensitive Receptor Survey Report(Ground Zero Analysis, Inc, August also <br /> 23,2002)for more details on these wells and others within 2,000 feet of the site V,,,,V% F,_I� r arm <br /> f 5 pGI'i l l'l'c- 54 4.r1.- )is fyp0�'Vnf—not�'iy =,tf Pel� 11 <br /> 2 Site maps Site maps depicting the former UST locations, soil boring locations, monitoring well -}9`V ' <br /> t� loc tans oundwa�er gr�dients buildings and streets are included m Attachment A - 00 s bsv r�dW id <br /> Ri n� �a �.��' —s�y 'No mW efcvzi a� cawnto"rs u+,l,fles <br /> �how„ D <br /> 4 �k ,51A Cross sections and figures picting lithology Soil boring logs, monitoring well logs and cross sections <br /> included in Attachment B depict the stratigraphy of the site h OAP— 11sfi,,,k <br /> 4 Stockpiled soil No contaminated soil generated from the tank excavation or drilling activities remains <br /> on site Soil that was documented as ND through laboratory analyses was utilized on site as fill Soil <br /> with detectable concentrations of petroleum hydrocarbons was reToved and disposed of at a Class 2 <br /> landfill -;-J!i t s i q -4- 13 <br /> 5 Monitoring wells remaining on site fate Three monitoring wells remain at the site (MW I, MW2, <br /> MW3) It is recommended that these wells be properly destroyed by backfilling with grout to the ground <br /> surface once site closure is granted <br /> 6 Tabulated results of RToundwater elevations and depths to water A table of groundwater elevation data <br /> is included in Attachment C Depths to water at the site have ranged from approximately 10 82 feet <br /> below grade to 12 31 feet below grade <br /> 7 Tabulated results of all sampling and analyses, including detection limits for confirmation sampling and <br /> lead analyses Analytical data for all soil and groundwater samples are summarized in the tables <br /> included in Attachment C <br /> 8 Concentration contours of contaminants in soil and groundwater <br /> Attachment D includes figures depicting 1)the lateral extent of soil contamination between the depths of <br /> approximately 10-15 feet,2)Cross sections showing the estimate vertical extent of soil contamination, 3) <br /> a figure showing the estimated lateral extent of groundwater contamination <br /> 9 Zone of influence for remediation system Not applicable <br />