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(r - <br /> Y <br /> QUARTERLY REPORT _ <br /> j August 1996 , <br /> Nomellini Construction Company <br /> ` 1:045 West Charter Way <br /> Stockton, California , <br /> 1.0. INTRODUCTIONJ <br /> 1 ; <br /> Y <br /> ,I In accordance with the request of Mr Dante John Nomellini, Advanced GeoEnvironmental, Inc ' <br /> (AGE) has prepared this Quarterly Report for the property at 1045 West Charter Way, Stockton, ' <br /> California The scope of work is to monitor the concentrations of petroleum hydrocarbons at the site <br /> This report summarizes field work performed at the site during August 1996 The location of the site <br />' in its surroundings are illustrated in Figure I - Location Map A layout of the property depicting <br /> structures and monitoring well locations are shown in Figure 2 - Site Plan <br /> I <br /> This report is prepared in accordance with the San'Joaquin County Public Health Services - w <br /> Environmental Health Division (PHS-EHD) and the Central Valley Regional Water Quality Control - <br /> Board (CVRWQCB) guidelines for the investigation of underground storage tank (UST) sites <br /> 1 - I <br /> Background information and `a summary of investigation at the site were included in a previous <br /> Quarterly Report dated 17 June 1996 prepared by AGE 1 <br /> I , <br /> 2.0. PROCEDURES <br /> 2 1 MONITORING WELL PURGE PROCEDURES , <br /> On 22 August 1996, the depth to ground water in each monitoring well wds measured to the'neares't " <br /> 0 01 foot utilizingµa Solist water level rneter The relative ground water'elevations were calculated <br /> by subtracting the depth to ground water from the relative casing elevations,surveyed from a <br /> temporary benchmark (Table I - Relative Ground Water Elevations) Relative ground water <br /> elevations were plotted'and contour4on a scaled site map (Figure 3'-Relative Elevation Ground = <br /> Water,Map) <br /> ' After water levels were measured, approximately ten to fourteen gallons (minimum of three well T <br /> f volumes) of water were purged from wells MW-,l through MW-9 utilizing a two-stage submersible <br />! pump Temperature, pH and conductivity were measured at regular intervals from each well using <br /> an ICM model 52200,water analyzer Stabilization data and field lags are in Appendix A Purged <br /> wateiw" as stored Iin 55-gallon drums ori-site in an area inaccessible Ito the general public <br /> t <br /> 22 GROUND WATER SAMPLE COLLECTION F' <br /> Monitonng wells MW' I through MW-9 were allowed to'recover for a minimum of one hour prior <br /> t <br /> a <br /> Y , <br /> � � 1 <br />