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f i <br /> n i <br /> f <br /> L <br /> N i i <br /> Q►UARTERLy - <br /> REPORT 'h <br /> September 1996 <br /> Stockton Plating - <br /> 632 South El-Dor ; <br /> ado Street <br /> - Stockto California <br /> n> Califor ' <br /> a rf <br /> INTRODUCTION <br /> r s r <br /> in accordance with the request of Stockton Platin �fa r <br /> pTepal ed this <br /> Quarterly Report of ground g,�dVanced GeoEjivlronmental, Inc (AGE)has <br /> in Stockton, California (the site g and water monitoring activities at 632 South El 1, <br /> r1lonitoring wells, one vaporThis report details the collection of ground water samplesado Street <br /> 181 September 1996 The <br /> extraction we11, <br /> and one`55-gallon barrel of purge water at t e�from <br /> on <br /> he site and Its surrou.�dlt�gs are Illustrated In Figure 1 - <br /> locations of structures and nlonitoring wells on the site J <br /> Location leap Tile <br /> are depicted In Figure 2 - Sile p1aj7 <br /> Monitoring and sam lxn <br /> p g procedures were performed In accordance With guidelines f <br /> the San Joaquin County Public Health Services - <br /> the Central Valle Environmental Health Division (PI SaEHD d by <br /> j. underground storayeReglonal �Jater Quality Control Boar <br /> g tank (UST) saes d (CVRW and <br /> ' QCB) for tnvesttgatlon of <br /> Background Information, Including <br /> s � 4uar,erlyr Report - detalis of previous sate assessment work, w <br /> AGE P Marcll4arch 1996 and Corrective flcrion plan - <br /> ' ' December 1995 both Se ted In the <br /> riF <br /> prepared by , <br /> 20- PRO <br /> CEI}URES r <br /> IT <br /> I <br /> In accordance with the'17,September 1996 v <br /> 'three wells, MW-3 � <br /> MW-4 and V ver request 114r Harlin Knoll of the pHs-E141),W-2, were sampled during the September 1996 monrtE1 ' only <br /> ng <br /> 21 <br /> A <br /> WATER PURGING PROCEDURES <br /> \ t e <br /> - x <br /> September 1996, a:Sohnst water level meter was used to <br /> In wells 1t4W_1 through meas' ° <br /> well and the hydraul c gra ent were dote and VW-2 The resat eve ground water ele ationure the Ith a ground water <br /> determined from these data points (Table 1� each monitoring <br /> After depth to water`measurements,^a minimum,of three <br /> each well using a Grur►dA s submersible well volumes of water was r"emoved from <br /> removed from MW-3, ten pump aPPxoxlmately forty-five ' <br /> removed from V W_2 gallons of water were removed from llIW_4 gallons of water were <br /> an ZCM water Temperature, pH, and conductivity were meas' and s� gallons of water were <br /> I; analyzer. Monitoring well stabilization,data and-field Measured at regular Intervals using <br /> Appendix A Purge-water produced by this procedure was stored on I eata rn sheets <br /> are Included In <br /> gallon drums. <br /> 4 <br />