Laserfiche WebLink
CITY OF STOCKTON REDS'`7LOPMENT AGENCY Page 2 of 2 <br /> i <br /> Does the site meet any of the Petroleum Vapor Intrusion to indoor Air specific criteria scenarios? C'i YES NO <br /> ADDITIONAL QUESTIONS-Please indicate only those conditions that do not meet the policy criteria: <br /> Soil Gas Samples <br /> G,No Soil Gas Samples G Taken Incorrectly <br /> Exposure Type: , <br /> Residentia4 Q Commercial <br /> Free Product: <br /> (j In Groundwater r In Soil [-i Unknown <br /> TPH In the Bioattenuation Zone: <br /> (�z 100 mgfkg ti'Unknown Q Soil samples not taken at two depths within 5 ft.zone(only for Scenario 4 with BioZone) <br /> Bioattenuation Zone Thickness: <br /> fi<5 Feet(No BioZone) f-_ 5 Feet and<10 Feet Q z 10 Feel and<30 Feet Q a 30 Feet C'30ft BioZone Compromised TPH>100mgtkg Ci Unknown <br /> 02 Data In Bioattenuation Zone <br /> r No 02 Data C 02 c 4% 02 t 4'4 <br /> Benzene in Groundwater: <br /> f`t 100 pgll and<1,000 pgfl r a 1,000 pgfl G Unkriown _ <br /> Soil Gas Benzene: <br /> C,t 85 pgrm3 and<280 pglm3 0 z 280 pglm3 and<85,000 pg1m3 f}2:85,000 pgtm3 and<280,000 pgfm3 0 a 280,000 4m3 {"Unknown <br /> Soil Gas EthylBenzene: <br /> G t 1,100 pglm3 and<3,600 pgtm3 r a 3,GW uglm3 and<1,100,000 pglm3 r z 1,100,000 pglm3 and.3,600,000 pglm3 r t 3,600,000 pgtm3 r_Unknown <br /> Soil Gas Naphthalene: <br /> i <br /> Z 93 pglm3 and<310 pglm3 r'a 310 pglm3 and<93,000 pglm3 G z 93,000 p9lm3 and<310;000 pglm3 G t 310,000 pglm3 r'Unknown <br /> 3.Media Specific Criteria:Direct Contact and Outdoor Air Exposure-The site is considered low-threat for direct contact and outdoor air exposure YES <br /> ifit meets 1,2,ora below.- R SECTION ANN9RS <br /> EXEMPTION-The upper 10 feet of soil is free of petroleum contamination G YES 1: NO <br /> - Does the site meet any of the Direct Contact and Outdoor Air Exposure criteria scenarios? r1 YES r NO <br /> 3.1-Maximum concentrations of petroleum constituents in soil are less than or equal to those listed in the following table(LINK)for the specified depth r• YES G NO <br /> below ground surface. <br /> Additional Information <br /> Should this case be closed in spite of NOT meeting policy criteria? <br /> Explain: <br /> impacted groundwater was not fully delineated at the Lime of the well destructions -preparation for construction work, <br /> although not fully delineated, it is reasonnble to expect that the remediation though excavation and removal of a <br /> significant portion of the secondary source that the dissovled plume would be reduced in areal extent over time. THe site is <br /> ear the waters of the port and prpbably does not have deep dissolved ptl=e extent. (" YE$ T NO <br /> The site fails the vapor intrusion 2a scenario 3i criteria due to benzene in one well over 100 ppb when last monitored (170 <br /> ppb in 2003)all the other monitored wells had non-detectable benzene concentrations. other than the one benzene <br /> concentration exceedence, the site fit all other 2a scenario 3i criteria. <br /> SPELL CHECK <br /> Sav6in 15rogress $ave as Final <br /> LOGGED IN AS HENDERSONN CONTACT K <br /> ER HELP <br /> f, <br /> https:Hgeotracker.waterboards.ca.gov/regulators/screens/closure_policy.asp?g lobal_id=TO... 6/26/2013 <br />