Laserfiche WebLink
1 <br /> y I <br /> Quarterly Report -- Third Quarter 2001 <br /> ' I CHAPIN BROTHERS, INC. ` <br /> 1766 Monte Diablo Avenue, Stockton, California <br /> i' 1.0. INTRODUCTION <br /> At the request of Mr Russell Chapin,Advanced GeoEnvironmental, Inc (AGE) has prepared this <br /> quarterly report of field activities conducted dun-ng the third quarter of 2001 at 1766 Monte Diablo <br /> Avenue, Stockton, California The site setting is illustrated in Figure 1 Structures and well locations <br /> on or near the site are illustrated in Figure 2 Quarterly ground water monitoring activities were <br /> t� conducted on 08 September 2001 <br /> Background information and a description of prior investigations at the site are included in the <br /> Problem Assessment Report (PAR) prepared by Science & Engineering Analysis Corporation <br /> (SEACOR) dated 22 July 1994 and in the AGE-prepared Quarterly Report - June and July 1999 <br /> t� <br /> 'dated 08 September 1999 Quarterly monitoring data from January 1994 to the present is <br /> summarized in Tables 1 and 2 in this report <br /> 2.0 PROCEDURES <br /> I <br /> j1 Ground water monitoring activities were performed in accordance with guidelines established by the ` <br /> San Joaquin County Public Health Services - Environmental Health Division (PHS-EHD) and <br /> California Regional Water Quality Control Board _ Central Valley Region(CRWQCB-CVR) and <br /> ' were performed in accordance with procedures described in the approved work plan addendums <br /> variously dated 07 April 1997, 10 May 1999 and 05-July 1999 <br /> 1 2 1 WELL MONITORING AND EVACUATION <br /> ' On 08 September 2001, a Solinst water level meter was used to measure the depth to ground water <br /> in monitoring wells MW-1 through MW-7 relative to the tops of the well casings(Table 1) <br /> After recording the depth to ground water measurements, monitoring wells MW-`l through MW-6 <br /> were purged using a two-stage purge pump and well MW-7 was evacuated utilizing a disposable <br /> Teflon bailer A minimum of three casing water-volumes of water were removed from near the top <br /> ' of the water column in each well Temperature, pH and conductivity of purged ground water were <br /> measured at regular intervals, as appropriate, using a Oak-ton water analyzer <br /> The purge pump was washed in an Alconox solution and rinsed with tap water prior to purging each <br /> well Purged water was stored in 55-gallon drums on the site Field measurements of purged ground_ <br /> water are included in,Appendlx A <br /> Advanced GeoEnvlronmental,Inc <br /> r <br /> s r <br />