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i <br /> November 30,2011 <br /> PARKINSON'S HAMMER 1-5 ARCO <br /> QUARTERLY STATUS UPDATE REPORT <br /> Facility Address: 3250 West Hammer Lane, Stockton, California <br /> Consulting Co./Contact Person: Stratus Environmental, Inc. /Sarah O. Salcedo, P.G. <br /> Consultant Project No: 2046-3250-01 <br /> Primary Agency/Regulatory ID No: Victoria McCartney, San Joaquin County Environmental Health <br /> Department(SJCEHD)/Site Code No. 2224 <br /> WORK PERFORMED THIS QUARTER(Third Quarter 2011): <br /> 1. In accordance with the SJCEHD-approved reduced monitoring/sampling program at the site,-no <br /> groundwater monitoring and sampiing activities were conducted during'the third qGiirt&2011. <br /> 2. Continued performance of the 90-day ozone/hydrogen peroxide injection (03/1-12O2) injection testing, <br /> which began in early June 2011. Site visits continued on a weekly basis throughout July and <br /> August 2011 (July 6, 14, 18, 25 and August 1, 12, and 22, 2011). The remediation event concluded <br /> on August 22, 2011 and during the remainder of the third quarter 2011, Stratus began tabulation <br /> and evaluation of the data collected: <br /> WORK PROPOSED FOR NEXT QUARTER(Fourth Quarter 2011): <br /> 1. Conduct semi-annual groundwater monitoring and sampling activities (scheduled for October 24, <br /> 2011). During this event, wells MW-1, MW-2, MW-5 and MW-7 will be gauged, purged, and <br /> sampled. Coordinated sampling with the adjacent former BP site, located at 3202 Hammer Lane, is <br /> no longer planned since this site is now under closure consideration by SJCEHD. <br /> 2. Prepare and submit to SJCEHD a report summarizing field data and analytical results associated <br /> with the recent 03/H2O2 injection testing. <br /> Current Phase of Project: Groundwater Monitoring/ Feasibility Testing <br /> Frequency of Groundwater Monitoring: All Wells=Semi-annually(2nd&4 t quarters) <br /> Frequency'of'Groundwat&Sampling:'- -Wdls'MW`11-2;=5 =7'=Semi-annually(2"d`&41h"quarters)- ` <br /> Wells MW-3, -4, -6 = Every 2 years(next 2Q 2011) <br /> Groundwater Sampling Date: No monitoring/sampling 3Q11 <br /> Is Free Product(FP) Present on Site: No <br /> Depth to Groundwater: No monitoring/sampling 3Q11 <br /> Groundwater Flow Direction and Average Gradient: No monitoring/sampling 3Q 11 <br /> ATTACHMENTS: (none) <br /> K:\Parkinsons Hammer 1-5 Arco\Quarterly\201]\Parkinson's Hammer 3Q11.doc STRATUS <br />