Laserfiche WebLink
,x01 ii— <br /> f 4+p1" A�...... m .-f.— '''^ eJ'•i9r ....-� � _ `...:.,.F ^�.^4—w.5-SCF , <br /> 1 Z 1 1 <br /> • Remediation Report -Fourth Quarter 2004 f <br /> Former STOCKTON PLATING Facility _ <br />' - 632 South E1 Dorado Street, Stockton, California - <br /> I1.0. INTRODUCTION # ", f'iil <br /> sMAtl'the request of Mr Richard Leland of R and LiBusmess Management of Stockton, Advanced = , Av.14" <br /> ;s <br /> GeoEnvironmental, Inc (AGE) has prepared this report for 632 South El Dorado Street, Stockton, <br />' = California (the site) This report documents soil and ground water extraction activities cnducted _or <br /> between August and November 2004 The site,setting is illustrated on Figure 1 The locations of <br /> i structures and monitoring wells on-site are depicted on Figure 2 1 <br /> r «I 5 <br /> Background information, including details of previous site assessment work is presented in <br />' Appendix A Results from previous ground water monitoring events are included in the tables of this ; <br /> a -report <br /> e <br /> 2.0. PROCEDURES ^ r <br />' All field work was performed in accordance with Central Valley Regional Water Quality Control <br /> Board(CVRWQCB)guidelines for the investigation of underground storage tank'(UST)sites Soil- <br />'• vapor and ground water extractions were performed in accordance with procedures outlined in the <br /> AGE-prepared Final Remediation Plan, dated 23 April 2002 and the AGE-prepared Final <br /> Remediation Plan Addendum; dated 18 July 2003 and approved by the EHD on 29 July 2003 Field <br />' procedures for soil-vapor and ground water sampling are described below „'rc <br /> , ' t <br /> 2-1 - SOIL-VAPOR EXTRACTION <br /> r I j <br /> {,A stand alone soil-vapor extractions stem (VES) or SVE vacuum pump (re enerative'blower) <br /> model Puri VFC100P was connected to the SVE network and started operation on 30 July 2004 The <br /> . ' SVE,unit operated at,a rate,of 24 hours a day during the quarter, however, a one month operational �, r <br /> ' 'hiatus was conducted pnor'to the October sampling to measure soil~vapor concentration rebound <br /> response r <br /> EI <br /> i L <br /> The system was monitored monthly`and inspected or maintained weekly during operation During ' <br />' each monitoring event, the flow rate of extracted soil-vapor (influent) was measured using an air <br /> flow meter (Blue White 200 cubic feet per minute efm) Vacuum potential was measured at the <br /> `3-inch influent linetusmg a magnehelic vacuum gauge The' organic-vapor,concentration in the <br />' extracted soil-vapor stream was measured after exiting the SVE blower using an organic vapor meter , <br /> (OVM) equipped with a with detector PID (Thermo Environmental 580B�, 10 OeV, <br />' calibrated,to isobutylene, 100 ppb) ' <br /> , <br /> r' Advanced GeoEnvironmental, Inc <br /> J a al w <br /> i <br />