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PUBLIC WORKS Page 1 of 1 Path to Closure Plan GO GEOTRACKER HOME IMANAGEEROJEOT$I RLE2M1296E0ILQQ M1 PUBLIC WORKS(70607700379)-MAP THIS SITE OPEN-SITE ASSESSMENT 1610 HAZELTON AVE E OLEANUP OVERSIGHT AGENCIES ACTWITIES REPORT SAN JOAQUIN COUNTY LOP(LEAD)-CASEN:1141 STOCKTON,CA 95201 CASEMAxl R:AN FIS N�✓A MA?M-SUPERVISOR:ADRIENNE ELLSAESSER SAN JOAQUIN COUNTY PUBLIC NEBPAGE CENTRALVAILEY RNDCB(REGioN 55)-CASE#390489 VIEW PRINTABLE GSE SUMMARYFOR THIS SITE CASEINORKER:JAMES BARlON-SUPERMSOR:CORI CONDON CUFCIaim Ik 11390 CUF Priority Assigned:D CUF Amount Paid:IQ THIS PROJECT WAS OAST MODIFIED By A IrAcxfF A�DOVALfij"ON I I/22I2D133.W:51 PIM-y6mm TNS SIM HAS SUBMITTALS.QUICK HM TO OPEN A NEW WINDOW WTH THE SUBMITTAL APPROVAL PAGE FOR THIS SITE. Path to Closure Plan THIS VERSIONIS INPROGRESSAS OF IWWO13 PATHTOCLOS�I sjm CLEAR I RESET PATH TO GLOIBRE MAN IMPEDIMENT 1: General Ctlterta F:Secondary source has NOT been removed to the extent practicable ❑ Procedural Impediment-am StI R•sulw Impediment 1-Step 1:-211LIUMSMI, COMPLETION DAIS LSof/las pilot testing has been performed and evaluation of its effectiveness In reducing contaminant concentrations in groundwater over time is required. If concentrations do not decrease significantly C over a short period of monitoring, additional remediation may be required to reduce concentrations, ee._and... --—, - ptTQ Al1fNTONAL- E► IMPEDIMENT 2: Media-Specific Criteria:Groundwater:The contaminant plume that exceeds water quality objectives Is ElProcedural Impatllment:-:M NOT stable or decreasing in areal extent,and does NOT meet all of the additional characteristics of one of the five classes of sites. Conditions that do not meet the policy criteria: • Plume Length(That Exceeds Water Quality Objectives):2 100 Feet and<260 Feet • Benzene Concentration:a 3,000 pg/I • MTBE Concentration:a 1,000 pg/I • Nearest Supply Well(From Plume Boundary):>260 Fast and 51,000 Feet ro Resolve Impediment 2-Shp 1:- COMPLETION DAIS 1"d,pa plume lament to <100 feet or reduce tQBE to < 1000 ug/1 and reduce Benzene to <3000 ug/1. The vertical extent of contemication is currently being monitored by an existing Tnw (air aparge) well in the source area. Further lateral and vertical definition may be required. ------ App 1OlxTXNML STEP IMPEDIMENT 3: _ Medi So"Ifig C'tails•Petroleum Vapor Intrigdon to Intl Alt:The site is NOT considered low-threat for C Procedural Impediment-mro the vapor-intrusion-toatr pathway and site-specific conditions do NOT satisfy Keme2a,21g,or 2c. Conditions that do not meet the policy criteria: • Soil Gas Samples:No Soil Gas Samples • Exposure Type:Commercial • TPH in the Bicattenuation Zone:a 100 mg/kg • 02 Data in Bioattenuation Zone:No OI Data • Benzene in Groundwater:a 1,000 pg/l ,I • Soil Gas Benzene:Unknown • Soil Gas Eth an,zene:Unknown • Soil Gas Naphthalene:Unknown StyhResdwlmpediment 3-S 1:- COMPLETION DATE Perform a soil gas investigation which could be problematic. This County Corp. Yard site is s active nvmrial Petroleum fueling facility,stores perked equip., and provide whical maintename which may PROJECTED DATE ACTU nor- have spillage at the dispensers and from the maintenance shop in the source area by"l- AM ADDITIONAL STEP REQUIREMENTS ALONG PATH TO CLOSURE PSL UqU WE DAMIDEN7IFIED RPNOTIFICATION PARTICIPATION pE9TRUCTON WASTEDISPOSAL LAND USE SITE CLOSURE Fs €C REINEDBY DCOMPLETIONDA _ MicaRESTRICTIONON IS PA F-- F-77=- sMWI&Wedlor Cims la Nm Gteallimpedimeme to closure have been removed Save Form as Partially Completed Save Form as Complete LOGGEDINASHMDERSONN CONTACT GEOTRACKERH P https:Hgeotracker.waterboards.ca.gov/regulators/screens/closure_lolicy.asp?global_id=T... 12/11/2013