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WELDON CHURCH RESIDr'TCE Page 1 of 1 <br /> saw <br /> ..r <br /> Path to Closure Plan GO GEOTRACKER HOME I MANAGE PROJECTS I REPORTS ISEARCH LOGOUT <br /> WELDON CHURCH RESIDENCE(T0607700214)-MAP THIS SITE OPEN-REMEDIATION <br /> 104 BEVERLY PL W CLEANUP OVERSIGHT AGENCIES <br /> TRACY,CA 95376 ACTIVITIES REPORT SAN JOAQUIN COUNTY LOP(LEAD)-CASE f:2253 <br /> SAN JOAQUIN COUNTY PUBLIC WEBPAGE CASEWORKER:VICKI MCCARTNEY-SUPERVISOR.ADRIENNE ELLSAESSER <br /> VIEW PRINTABLE CASE SUMMARY FOR THIS SITE CENTRAL VALLEY RWQCB(REGION 5S)-CASEY:390292 <br /> CASEWORKER:JAMES BARTON-SUPERVISOR:CORI CONDON <br /> CUF Claim N:8502 CUF Priority Assigned:B CUF Amount Paid:5383.033 <br /> THIS PROJECT WAS LAST MODIFIED BY NOEL NENDERSON ON 6/27/2014 10:44:30 AM-IREIM <br /> THIS SITE HAS SUBMITTALS.CLICK JIM TO OPEN A NEW WINDOW WITH THE SUBMITTAL APPROVAL PAGE FOR THIS SITE. <br /> Path to Closure Plan TNIS VERSION IS FINAL AS OF 8/27/2014 PATH TO CLOSURE HISTORY CLEAR I RESET PATH TO CLOSURE PLAN <br /> IMPEDIMENT 1: <br /> General Criteria F:Secondary source has NOT been removed to the extent practicable ] r Procedural Impediment- <br /> Difficult Site Conditions <br /> DATE RESOLVED <br /> Step to Resolve Impediment l-Ste 1:-DE E7E STEP <br /> COMPLETION DATE <br /> JReduce secondary source that contributes to the vapor intrusion problem on this residential site. A - - -- <br /> vapor mitigation system was installed in the crawl space beneath the home in June 2012 and is in PROJECTED DATE 1�ACTUAL DA ''� <br /> operation, but the vapor intrusion problem should be addressed prior to site closure. 12/152015 I <br /> ADD ADDITIONAL STEP <br /> IMPEDIMENT 2: <br /> Media Specific Criteria:Petroleum Vapor Intrusion to Indoor Air:The site is NOT considered low-threat for r Procedural Im ediment- <br /> the vapor-intrusion-to-air pathway and site-specific conditions do NOT satisfy items 2a,2b,or 2c. Difficult Site Conditions <br /> Conditions that do not meet the policy criteria: DATE RESOLVED <br /> • Exposure Type:Residential <br /> • TPH In the Bioattenuation Zone:t 100 mg/kg <br /> • Bioattenuation Zone Thickness:t 5 Feet and<10 Feet <br /> • 02 Data in Bioattenuation Zone:No 02 Data <br /> • Soil Gas Benzene:z 85 pg/m3 and<280 pg/m3 <br /> • Soil Gas Naphthalene:Unknown <br /> to Resolve Impediment 2-Stop 1:.DFLETE STFP COMPLE71ON DATE <br /> 1Site has not been demonstrated to have at least a 5-foot bioattenuation zone; need to collect additional <br /> soil samples to show current conditions. Need to remediate soil impacted by excessive concentrations of <br /> benzene and ethylbenzene. Additional soil gas sampling may be appropriate, at which time oxygen and 12/752015 <br /> ­hthl—--los a • - <br /> ADD ADDITIONAL STEP <br /> IMPEDIMENT 3: <br /> Media Specific Criteria:Direct Contact and Outdoor Air Exposure:The site is NOT considered low-threat F Procedural Impediment-INFO <br /> for direct contact and outdoor air exposure as it does NOT meet 1,2,or 3. Difficult Site Conditions <br /> Conditions that do not meet the policy criteria: DATE RESOLVED <br /> Exposure Type:Residential <br /> Petroleum Constituents in Soil:<_5 Feet bgs <br /> Soil Concentrations of Benzene:>14 mg/kg <br /> Soil Concentrations of EthylBenzene:>89 mg/kg and<134 mg/kg <br /> Soil Concentrations of Naphthalene:Unknown <br /> Soil Concentrations of PAH:Unknown <br /> Stop to Resolve Impediment 3-Ste 1:-DELE STEP COMPLETION DATE <br /> Some additional assessmer,t ray be appropriate to better characterize the impacted soil issue which must ---- -- --- - <br /> be addressed on this residential property. TE ACTUAL DATE <br /> 12/15/2015 �— <br /> ADD ADDITIONAL STEP <br /> REQUIREMENTS ALONG PATH TO CLOSURE <br /> PUBLIC WELL <br /> DATE IDENTIFIED RP NOTIFICATION PARTICIPATION DESTRUCTION WASTE DISPOSAL LAND USE SITE CLOSURE <br /> FORCLOSURE* fLOSURE INITIATED BY DI COMPLETION DATE D DATE <br /> RESTRICTION DATE D <br /> Date Identified for Closure is the date all impediments to closure have been removed-- <br /> Save Form as Partially Completed I Save Form as Complete <br /> LOGGED IN AS HENDERSONN CONTACT GEOTRACKER HELP <br /> https:Hgeotracker.waterboards.ca.gov/regulators/screens/closure—policy.asp?global_id=TO... 6/27/2014 <br />