Laserfiche WebLink
NNNi <br /> WALLACE- KUHL May 28, 1997 <br /> &ASSOCIATES INC <br /> Ms Jan Cordini <br /> U S RENTALS <br /> 1581 Cummins Road, Suite 155 <br /> Modesto, California 95358 <br /> QUARTERLY GROUND WATER MONITORING <br /> AND SAMPLING REPORT <br /> 1444 MARIPOSA ROAD <br /> Stockton, Callforrua 95205 <br /> WKA No 2938 03 <br /> Dear Ms Cordini, <br /> Ground water elevation measurements were obtained from the three on-site <br /> l monitoring wells on April 11, 1997 (Table 1) Based on current ground water <br /> elevation measurements, the ground water flow beneath the subject property is in a <br /> ', southeasterly direction with an estimated hydraulic gradient of 0 003 feet/foot <br /> (Plate 2) <br /> ceorechmcat Eng=veering Ground water samples were also obtained from the three wells on April 11, 1997 <br /> Prior to purging and sampling, the water level in each well was measured with an <br /> Engineering Geology <br /> electronic water level indicator and checked for visual signs of free product using <br /> Environmental Comuttmg new, clean, disposable polyethylene bailers No free product, sheen or odor was <br /> i' observed in the monitoring wells Prior to sampling, approximately three well <br /> Remediation Services <br /> volumes of water were removed from the wells by using a 3t/s-inch diameter <br /> Construction Inspection polyvinyl chloride (PVC) bailer and sampling equipment was cleaned with a <br /> solution of tnsodium phosphate and water to minimize the potential for cross- <br /> Materials Testing contamination between the wells Ground water samples were then collected using <br /> new polyethylene disposable bailers and decanted into appropriate sampling <br /> containers provided by the analytical laboratory The samples were immediately <br /> 3050 Industrial Blvd placed in an ice-chest containing ice and submitted under chain-of-custody to a <br /> Wes[Sacramento California Department of Health Services certified laboratory for analysis of Total <br /> �\ <br /> CA 95691 Petroleum Hydrocarbons (TPH) as gasoline, diesel, and motor oil using modified <br /> EPA method 8015, and Benzene, Toluene, Flhylbenzene, and Total <br /> Fax 916 372 2565 <br /> 7 916 372 1434 <br /> Recy&d paper <br />