ARCHIVED REPORTS XR0011674 - Laserfiche WebLink

Home Browse Search

' KLEINFELDER I EXECUTIVE SUMMARY This is a report of Kleinfelder's Limited Phase Il Assessment conducted within the Weber Point South Seawall at 221 North Center Street (portion of) in Stockton, California which is proposed for ' redevelopment Mr Tony Lopes of Siegfried Engineering, Inc , retained Kleinfelder to conduct the assessment in accordance with our proposal (File No 20-1129-30) dated November 18, 1996 The assessment was performed as follow-up services in response to recommendations detailed in Klemfelder's report titled "Phase I Environmental Site Assessment, Weber Point South Seawall, 221 North Center Street, Stockton, California" report dated July 14, 1997 (Kleinfelder File No 20- 1129-30 G01) and 1n anticipation of planned seawall improvements Kleinfelder conducted this limited assessment of the site to evaluate the presence of selected contaminants which may be associated with an adjacent ARCO retail service station and documented regional sources of groundwater contamination which have the potential to impact the site Soil samples were collected at 5 foot intervals from 3 soil borings The borings were advanced to groundwater and Hydropunch II TM water samples were collected An additional surface water sample was also collected from the Stockton Deep Water channel for background references Unidentified Extiactable Hydrocarbons (340 Ii IL } in the carbon range C 1 to C30 was detected above laboratory ieporting limits in the groundwater sample collected from boring 14P-3 In addition, Unidentified Extractable Hydrocarbon (450 µg/L ) in the carbon range C13-C40 was detected above laboratory limits in the channel water sample Acid/Base Neuttal Organic constituents (Bis(2-ethylhexyl)phthalate (2100 µg/L ) sand Butyl benzyl phthalate (40 µg/L ) were detected in boring HP-1 Butyl benzyl phthalate (29 lig/L ) was ' detected in boring HP-2 Based on the data obtained during our assessment, the following conclusions and recommendations have been formulated 1 Klemfelder does not recommend any further investigation or clean-up for the site However Kleinfelder recommends that a copy of this report be submitted to the RWQCB and PHSIEHD for their review and comment 2 The drilling returns (soil) should be properly disposed of by the Client Kleinfelder can assist the Client in that disposal at an additional charge if requested by the client ' 3 If discolored soil, odors, of other evidence of contamination are encountered during site grading development, etc , our office should be notified immediately 20-1129-.,0/20178;14 Page, I of 13 ' © 1997 KILMleklLI 111L July 14 1997