AFFILIATED RESEARCHERS conducts Hydrographic and Geophysical Surveys Offshore the RASA Refineria Petrolera Acajutla, El Salvador.

AFFILIATED RESEARCHERS conducted hydrographic and magnetometer sonar surveys for Puma Energy, offshore the RASA Refineria Petrolera, Acajutla, El Salvador. These services were a critical aspect to support the engineering and environmental requirements for the necessary replacement of underwater pipes used by Puma Energy for offshore conveyance of oil products.

El SalvadorAFFILIATED RESEARCHERS utilized a locally provided vessel of opportunity to conduct the hydrographic and geophysical surveys over a 1/2 mile square offshore area. AFFILIATED RESEARCHERS utilized its Klein 5000 Hydrochart sonar equipment, Applanix Wavemaster motion sensor, and Trimble RTK-GNSS survey equipment to collect side-scan and multi-beam data in the offshore area.

The Klein 5000 Hydrochart sonar system enables multi-beam and side-scan sonar data to be collected simultaneously, and is considered “Best in Class” for accuracy and repeatability (IHO SP-44, special order surveys). The Klein 5000 Hydrochart contains an opposing pair of swath multi-beam 455 kHz transducers which produce 2100 sonar coverage; at a beam sample rate of 6600 points/swath at a swath rate of 10 swaths per second.

A Knudsen 3112 echo sounder and Trimble RTK-GNSS survey equipment was used to collect single-beam sonar and sub-bottom profiling data in the offshore area. A Geometrics 882S magnetometer and Trimble RTK-GNSS survey equipment was used to collect magnetic anomaly data in the offshore area. A ponar sediment collection dredge and Trimble RTK-GNSS survey equipment was used to collect sediments samples to provide confirmation of sediment types.

As a necessary aspect of most of its projects, AFFILIATED RESEARCHERSestablished a semi-permanent, local benchmark (at < 0.05′ horizontal and vertical accuracies) using recognized NGS OPUS methods. The local benchmark was used during the project to provide an accurate establishment of a RTK-GPS base station to provide real-time corrections to the Trimble RTK-GNSS survey equipment.

The hydrographic and RTK-GNSS data collected by AFFILIATED RESEARCHERS were compared with local NOAA tide gauge data and with local benchmarks for QAQC and to calibrate mean sea level elevations.

side scan

The hydrographic surveys were conducted in accordance recognized protocols and technical guidance provided in the US Army Corp of Engineers Engineering and Design Hydrographic Surveying manual and the NOS Hydrographic Surveys Specifications and Deliverables. A summary report containing methods, drawings, maps, and tabular data was compiled and presented by AFFILIATED RESEARCHERS.

AFFILIATED RESEARCHERS‘ highly trained personnel utilize the industry’s best technology to assure the highest quality deliverables. Since 1990, AFFILIATED RESEARCHERS has provided environmental and technical services to a wide array of clientele including government agencies, municipalities, utility districts, oil and mineral exploration, and environmental-engineering firms.